ros开发增加clion常用模板及初始化配置(一)

旧城等待， 2023-02-22 13:49 11阅读 0赞

## clion 初始化开发配置笔记针对ros ##

数学公式网站

[https://mathpix.com/][https_mathpix.com]

[http://webdemo.myscript.com][http_webdemo.myscript.com]

1.安装ros插件

功能是创建msg文件时有提示

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70][]

2. translation 安装翻译插件

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 1][]

3.hatchery插件

功能是创建launch 文件时有提示

## ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 2][] ##

3. CommonCode插件 辅助代码功能

![20200726190808298.png][]

3.CodeGlance插件

![20200726190740840.png][]

4. 配置默认使用xml打开urdf文件;

ps: 项目第一次创建urdf文件时就可以选择xml打开,但是你第一次选择的是txt文件默认打开的话需要在这个设置里把它改过来

4.1 删除默认txt文件打开

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 3][]

4.2添加默认xml文件方式打开urdf文件

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 4][]

4.3

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 5][]

4.4

ubuntu 把pip也换成国内源

mkdir ~/.pip
     
    cd ~/.pip
     
    touch pip.conf
     
    sudo nano ~/.pip/pip.conf

打开pip.conf 文件后，添加以下内容:

[global]
     
    index-url =  http://mirrors.aliyun.com/pypi/simple/
     
     
     
    [install]
     
    trusted-host = pypi.tuna.tsinghua.edu.cn

更新一下：

sudo apt-get update

安装jupyter notebook

安装jupyter notebook
    conda install jupyter notebook
    安装jupyter notebook的代码提示功能
    pip install jupyter_contrib_nbextensions //报错就用下一行
    
    pip install --user -i https://pypi.tuna.tsinghua.edu.cn/simple  jupyter_contrib_nbextensions
    
    jupyter contrib nbextension install --user --skip-running-check
    
    启动jupyter notebook
    jupyter notebook
    
    点开 Nbextensions 的选项，并勾选 Hinterland

## 1. clion模板配置 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 6][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 7][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 8][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 9][]

## 模板数据在下面! ##

2.大小写匹配提示

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 10][]

3. 打开clion后不会进入上一次项目

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 11][]

4.opencv图片显示 ;目前只看到windows有这个功能

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 12][]

2. c++ class 模板配置

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 13][]

#parse("C File Header.h")
    #[[#ifndef]]# ${INCLUDE_GUARD}
    #[[#define]]# ${INCLUDE_GUARD}
    
    ${NAMESPACES_OPEN}
    
    class ${NAME} {
    public:
        ${NAME}();
        ~${NAME}();
    };
    
    ${NAMESPACES_CLOSE}
    
    #[[#endif]]# //${INCLUDE_GUARD}

#parse("C File Header.h")
    #[[#include]]# "${HEADER_FILENAME}"
    
    ${NAME}::${NAME}(){
        
    }
    ${NAME}::~${NAME}(){
    
    }

**3.python ros环境配置**

##  Clion的Python环境[¶][Link 1] ##

为了演示第一个程序，首先我们按照前面的例子，在workspace中创建一个`demo_py`的package，我们基于这个`demo_py`进行讲解开发。

使用clion打开`demo_py`。

### 1. 创建scripts目录[¶][Link 2] ###

在`demo_py`的目录中创建`scripts`目录，用于写python代码。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 14][]

### 2.配置Python环境[¶][Link 3] ###

打开clion的`setting`，来到`Build,Execution,Deployment`的`Python Interpreter下`,点击设置按键，点击添加。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 15][]

打开python环境设置按钮，添加python环境

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 16][]

Tip

**特别要注意\*\*的是，目前ROS Melodic版本还\*\*不支持python3**，要等到ROS N版才会支持。

因此，我们选择环境的时候\*\*选择python2.x版本\*\*。

**注意: 新建的python文件需要改权限才能运行 chmoe 777 \***

# #

**4.导入qt库**

## Qt 环境配置[¶][Link 4] ##

C++ 开发ROS项目过程中，如果要引入Qt，需要进行依赖的配置。

以新建的`demo_turtle`package为例，我们就要对`CMakeLists.txt`进行依赖配置。

### 4.1. 添加c++ 11编译的支持[¶][Link 5] ###

Tip

默认的时候，这个配置是被注释起来的，我们只要解开注释就可以。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 17][]

### 4.2 添加Qt的环境配置[¶][Link 6] ###

set(CMAKE_INCLUDE_CURRENT_DIR ON)
    set(CMAKE_AUTOMOC ON)
    
    find_package(Qt5 COMPONENTS Core Gui Widgets PrintSupport)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 18][]

tip: find\_package中，都是要加载的Qt模块，后续如果还需要添加其他的Qt模块，可以在后面追加。

### 4.3  配置CMake[¶][Link 7] ###

来到`CMakeLists.txt`文件中，添加如下:

add_executable(turtle_control src/turtle_control.cpp)
    target_link_libraries(turtle_control
            ${catkin_LIBRARIES}
            Qt5::Core
            Qt5::Gui
            Qt5::Widgets
            Qt5::PrintSupport
     )

## ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 19][] ##

## tip: ##

`add_executable`是把`turtle_control.cpp`标记为可执行的

`target_link_libraries`是为`turtle_control.cpp`提供链接库的，值得注意的是，`${catkin_LIBRARIES}`是ros的依赖库，`Qt5::Core`，`Qt5::Gui`，`Qt5::Wigets`，`Qt5::PrintSupport`是qt的依赖库。

# 5. 配置CMakeLists.txt #

改变编译程序的存储路径，生成xml的保存路径

# ![20200726192629466.png][] #

# 改变编译程序的存储路径，生成xml的保存路径
    set(OUTPUT_DIRECTORY_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/build) # ${CMAKE_BUILD_TYPE}
    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${OUTPUT_DIRECTORY_ROOT}/bin" CACHE PATH "Runtime directory" FORCE)
    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${OUTPUT_DIRECTORY_ROOT}/lib" CACHE PATH "Library directory" FORCE)
    set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${OUTPUT_DIRECTORY_ROOT}/lib" CACHE PATH "Archive directory" FORCE)

# 5. catkin 编译脚本 #

catkit\_make\_source.sh

用 source catkit\_make\_source.sh 命令启动

#!/bin/bash
    catkin_make
    if [[ $? != 0 ]]; then
    echo 'catkin_make :error'
    else
    echo 'catkin_make :ok'
    source devel/setup.bash
    echo 'source devel/setup.bash :ok'
    fi

# #

## 6.启动clion脚本 ##

clion\_start.sh

#!/bin/bash
    bash ~/CLion-2020.1.1/clion-2020.1.1/bin/clion.sh

## 7.进入指定文件夹的shell脚本 ##

inWorkspaceWorkProject.sh

用控制台命令:  source inWorkspaceWorkProject.sh  启动

或者 . ./inWorkspaceWorkProject.sh 命令运行脚本,第二个命令注意两个点之间是有空格的;

#!/bin/bash
    cd ~/workspace/ros_work5

## 8.看直播视频 ##

receiver.sh

#!/bin/bash
    bash ~/receiver/start.sh 192.168.22.255

## 9.robot.czxy.com 笔记网站 ##

[http://robot.czxy.com/car/][http_robot.czxy.com_car]

查看摄像头
    ll /dev/video*  
    查询 c++ 库中的方法函数 
    进opencv_env/opencv-3.4.9 目录下
    grep -rniI "cornerHarris(" *
    grep -rniI "cornerHarris(" * --include=*.cpp
    
    制作 命令台命令：
    通过一个命令启动
    例如：
    在 ~/.bashrc 中加入
    alias sd='source devel/setup.sh'
    在命令台中就可以使用 sd 命令

### **10.拨号上网配置** ###

sudo pppoeconf

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 20][]

断开拨号上网

sudo poff dsl-provider
    sudo dhclient

# 11. 连接不了广播时运行下面命令,重新分配ip #

sudo dhclient

###  12.运行  ###

sudo apt-get install ros-melodic-franka-ros

sudo apt-get install ros-melodic-industrial-*

sudo apt install ros-melodic-joint-state-publisher-gui

编译工具

sudo apt-get install build-essentia

摄像头端口

/dev/video*

### 12.安装多窗口控制台 Terminator ###

sudo apt-get install terminator

### ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 21][] ###

### 13.串口调试工具cutecom ###

sudo apt install cutecom

## ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 22][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 23][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 24][]

## \----------------------------------------------------------------------------------------------- ##

模板数据

## python 模板: ##

py\_ros\_main\_node节点

#!/usr/bin/env python
    # coding:utf-8
     
    import rospy
    # 导入数据
    from std_msgs.msg import String
    if __name__ == '__main__':
        # 节点名
        nodeName = 'py_publisher'
        # 初始化节点 定义匿名节点加参数 anonymous=True
        rospy.init_node(nodeName,anonymous=True)

py\_ros\_node初始化

import rospy
    
    
        # 节点名
        nodeName = 'py_publisher'
        # 初始化节点 定义匿名节点加参数 anonymous=True
        rospy.init_node(nodeName,anonymous=True)

1.py\_ros\_class\_PyQt5

#!/usr/bin/env python
    # coding:utf-8
    from PyQt5.QtWidgets import QWidget,QFormLayout,QLineEdit,QPushButton,QLabel
    from geometry_msgs.msg import Twist
    from turtlesim.msg import Pose
    import rospy
    
    class MainWindow(QWidget):
        def __init__(self,publisher):
            super(MainWindow, self).__init__()
            pass

2.py\_ros\_main\_PyQt5\_node初始化

#!/usr/bin/env python
    # coding:utf-8
    
    
    from PyQt5.QtWidgets import QApplication
    from MainWindow import MainWindow
    import sys
    import rospy
    if __name__ == '__main__':
        # 创建节点
        rospy.init_node("py_control",anonymous=True)
        # 创建Qt
        app = QApplication(sys.argv)
        # 创建窗口
        w = MainWindow()
        # 展示窗口
        w.show()
        # 等待程序结束
        sys.exit(app.exec_())

3.1server

py\_ros\_client\_main通讯

#!/usr/bin/env python
    # coding:utf-8
    import rospy
    from roscpp_tutorials.srv import TwoInts,TwoIntsRequest
    
    if __name__ == '__main__':
        # 创建节点
        rospy.init_node("py_client",anonymous=True)
        # service名字
        serviceName = 'py_service'
        # 创建客户端
        proxy = rospy.ServiceProxy(serviceName, TwoInts)
        # 等待service上线
        proxy.wait_for_service()
        # 请求数据
        req = TwoIntsRequest()
        req.a = 12
        req.b = 13
        # 调用service
        result = proxy.call(req)
        print result

py\_ros\_client通讯

import rospy    
        from roscpp_tutorials.srv import TwoInts,TwoIntsRequest
    
        # service名字
        serviceName = 'py_service'
        # 创建客户端
        proxy = rospy.ServiceProxy(serviceName, TwoInts)
        # 等待service上线
        proxy.wait_for_service()
        # 请求数据
        req = TwoIntsRequest()
        req.a = 12
        req.b = 13
        # 调用service
        result = proxy.call(req)
        print result

3.1 py\_ros\_server\_main通讯

#!/usr/bin/env python
    # coding:utf-8
    import rospy
    from roscpp_tutorials.srv import TwoInts
    
    def callBack(req):
        return req.a+req.b
    
    if __name__ == '__main__':
        # 创建节点
        rospy.init_node("py_server",anonymous=True)
        # service名字
        serviceName = 'py_service'
        # 创建server端
        service = rospy.Service(serviceName, TwoInts, callBack)
        # 阻塞
        rospy.spin()

py\_ros\_server通讯

import rospy
    from roscpp_tutorials.srv import TwoInts
    
    def callBack(req):
        return req.a+req.b
    
    # 创建节点
    rospy.init_node("py_server",anonymous=True)
    # service名字
    serviceName = 'py_service'
    # 创建server端
    service = rospy.Service(serviceName, TwoInts, callBack)
    # 阻塞
    rospy.spin()

4. topic

py\_ros\_publisher\_main\_topic通讯

#!/usr/bin/env python
    # coding:utf-8
    
    import rospy
    # 导入数据
    from std_msgs.msg import String
    if __name__ == '__main__':
    
        # 节点名
        nodeName = 'py_publisher'
        # 初始化节点
        rospy.init_node(nodeName,anonymous=True)
        # 话题名
        topicName = 'py_topic'
        # 创建发布者
        publisher = rospy.Publisher(topicName, String, queue_size=5)
        # 每一秒钟发送一条消息
        rate = rospy.Rate(1)
        i = 0
        # 循环
        while not rospy.is_shutdown():
            # 消息内容
            data = String()
            data.data = 'hello {}'.format(i)
            # 发送消息
            publisher.publish(data)
            # 增加数据
            i += 1
            rate.sleep()

py\_ros\_publisher通讯

import rospy
    # 导入数据
    from std_msgs.msg import String
    
    
        # 话题名
        topicName = 'py_topic'
        # 创建发布者
        publisher = rospy.Publisher(topicName, String, queue_size=5)
        # 每一秒钟发送一条消息
        rate = rospy.Rate(1)
        i = 0
        # 循环
        while not rospy.is_shutdown():
            # 消息内容
            data = String()
            data.data = 'hello {}'.format(i)
            # 发送消息
            publisher.publish(data)
            # 增加数据
            i += 1
            rate.sleep()

py\_ros\_subscriber\_main通讯

#!/usr/bin/env python
    # coding:utf-8
    
    import rospy
    # from std_msgs.msg import String
    from geometry_msgs.msg import Twist
    import threading
    # python订阅者回调在子线程中
    def callBack(data):
        print '接收的线程id:{}'.format(threading.current_thread().name)
        print '收到数据:{}'.format(data.linear.x)
    
    if __name__ == '__main__':
        print '主线程线程id:{}'.format(threading.current_thread().name)
        # 节点名
        nodeName = 'py_subscriber'
        # 初始化节点
        rospy.init_node(nodeName,anonymous=True)
        # topic名字
        topicName = 'py_topic'
        # 创建订阅者
        # 参数1：topic名字
        # 参数2：topic数据类型
        # 参数3：回调函数
        subscriber = rospy.Subscriber(topicName, Twist, callBack)
        # 事件处理
        rospy.spin()

py\_ros\_subscriber通讯

import rospy
    # from std_msgs.msg import String
    from geometry_msgs.msg import Twist
    
    
    def callBack(data):
        data.linear.x
        print '收到数据:{}'.format(data.linear.x)
    
      
    # topic名字
    topicName = 'py_topic'
    # 创建订阅者
    # 参数1：topic名字
    # 参数2：topic数据类型
    # 参数3：回调函数
    subscriber = rospy.Subscriber(topicName, Twist, callBack)
    # 事件处理
    rospy.spin()

py\_time

#!/usr/bin/env python
    # coding:utf-8
    import rospy
    from PyQt5.QtWidgets import *
    from PyQt5.QtCore import QTimer
     
     
    class MainWindow(QWidget):
        def __init__(self):
            super(MainWindow, self).__init__()
            self.timer = QTimer(self)
            self.timer.setInterval(100)
            self.timer.timeout.connect(self.timeout)
            self.timer.start()
     
        def timeout(self):
     #定时的槽函数 判断ros是否关闭,ros关闭后关闭窗口
            if rospy.is_shutdown():
                QApplication.quit()

py\_getThread\_Id获取多线程的线程ID

import threading
    print '接收的线程id:{}'.format(threading.current_thread().name)

**4.action标准通讯**

py\_ros\_action\_client\_main标准通讯

#!/usr/bin/env python
    # coding:utf-8
    import rospy
    from actionlib import ActionClient,ClientGoalHandle,CommState,TerminalState
    from demo_actions.msg import CountNumberAction,CountNumberGoal
     
    def transition_cb(goalHandle):
     
        commState = goalHandle.get_comm_state()
        if commState==CommState.PENDING:
            rospy.loginfo('PENDING')
        elif commState==CommState.ACTIVE:
            rospy.loginfo('ACTIVE')
        elif commState==CommState.DONE:
            rospy.loginfo('DONE')
     
     
    def feedback_cb(goalHandle,feedback):
        rospy.loginfo('feedback')
     
     
    if __name__ == '__main__':
        # 创建节点
        rospy.init_node("action_client")
        # action名字
        actionName = 'action_py'
        # 创建客户端
        client = ActionClient(actionName,CountNumberAction)
        # 等待
        client.wait_for_server()
        goal = CountNumberGoal()
        goal.max = 10
        goal.duration = 1
        # 发送指令
        goal = client.send_goal(goal,transition_cb,feedback_cb)
        # 阻塞
        rospy.spin()

py\_ros\_action\_server\_main标准通讯

#!/usr/bin/env python
    # coding:utf-8
    import rospy
    from actionlib import ActionServer,ServerGoalHandle
    from demo_actions.msg import CountNumberAction,CountNumberFeedback
     
    def goal_cb(goalHandle):
        rospy.loginfo('receive goal')
        # goal = ServerGoalHandle()
        # 接受
        goalHandle.set_accepted()
        # 获取目标
        max = goalHandle.get_goal().max
        duration = goalHandle.get_goal().duration
        for i in range(1,max):
            feed = CountNumberFeedback()
            feed.percent = float(i)/max
            # 进度
            goalHandle.publish_feedback(feed)
     
     
    def cancel_cb(goalHandle):
        rospy.loginfo('cancel goal')
     
    if __name__ == '__main__':
        # 创建节点
        rospy.init_node("action_server")
        # action名字
        actionName = 'action_py'
        # server
        server = ActionServer(actionName,CountNumberAction,goal_cb,cancel_cb,auto_start=False)
        # 开启服务
        server.start()
        # 阻塞
        rospy.spin()

py\_ros\_action\_client\_class标准通讯

#! /usr/bin/env python
    # coding: utf-8
    from PyQt5.QtWidgets import QWidget,QFormLayout,QLineEdit,QLabel,QPushButton
    from PyQt5.QtCore import QTimer
    from actionlib import ActionClient,ClientGoalHandle,CommState,TerminalState
    from demo_actions.msg import CountNumberAction,CountNumberGoal,CountNumberResult,CountNumberFeedback
    import rospy
    
    class ActionClientWindow(QWidget):
    
        def __init__(self):
            super(ActionClientWindow, self).__init__()
    
            # 自定义 timer， 负责页面更新
            # update_timer = QTimer(self)
            # update_timer.setInterval(16)
            # update_timer.start()
            # # timer事件回调
            # update_timer.timeout.connect(self.on_update)
    
            # 设置title
            self.setWindowTitle("")
    
            layout = QFormLayout()
            self.setLayout(layout)
    
            self.le_max = QLineEdit("100")
            layout.addRow("数到多少", self.le_max)
    
            self.le_duration = QLineEdit("0.1")
            layout.addRow("间隔时间", self.le_duration)
    
            self.lb_percent = QLabel()
            layout.addRow("进度显示", self.lb_percent)
    
            self.lb_result = QLabel()
            layout.addRow("结果显示", self.lb_result)
    
            self.lb_result_state = QLabel()
            layout.addRow("结果状态", self.lb_result_state)
    
            btn_send = QPushButton("发送")
            layout.addRow(btn_send)
    
            btn_cancel = QPushButton("取消执行")
            layout.addRow(btn_cancel)
    
            btn_send.clicked.connect(self.click_send)
            btn_cancel.clicked.connect(self.click_cancel)
    
            # 创建Action client
            action_name = "/hello/action"
            self.client = ActionClient(action_name, CountNumberAction)
    
            self.handle = None
    
        def click_send(self):
            goal = CountNumberGoal()
            goal.max = long(self.le_max.text())
            goal.duration = float(self.le_duration.text())
            self.handle = self.client.send_goal(goal, self.transition_cb, self.feedback_cb)
    
        def transition_cb(self, handle):
            if not isinstance(handle, ClientGoalHandle):
                return
            comm_state = handle.get_comm_state()
            if comm_state == CommState.ACTIVE:
                print "ACTIVE"
            elif comm_state == CommState.DONE:
                # 干完活后的回调
                state = handle.get_terminal_state()
                if state == TerminalState.ABORTED:
                    # sever中断
                    self.lb_result_state.setText("sever中断")
                elif state == TerminalState.PREEMPTED:
                    # client取消
                    self.lb_result_state.setText("client取消")
                elif state == TerminalState.REJECTED:
                    # client数据校验未通过
                    self.lb_result_state.setText("client数据校验未通过")
                elif state == TerminalState.SUCCEEDED:
                    # SUCCEEDED
                    self.lb_result_state.setText("SUCCEEDED")
                result = handle.get_result()
                if not isinstance(result, CountNumberResult):
                    return
                self.lb_result.setText(str(result.count))
    
        def feedback_cb(self, handle, feedback):
            if not isinstance(handle, ClientGoalHandle):
                return
            if not isinstance(feedback, CountNumberFeedback):
                return
            self.lb_percent.setText(str(feedback.percent))
    
        def click_cancel(self):
            print "cancel"
            if not isinstance(self.handle, ClientGoalHandle):
                return
            self.handle.cancel()
    
        # def on_update(self):
        #     # qt刷新
        #     self.update()
        #
        #     # 判断用户终止操作
        #     if rospy.is_shutdown():
        #         self.close()

py\_ros\_action\_server\_class标准通讯

#! /usr/bin/env python
    # coding: utf-8
    from PyQt5.QtWidgets import QWidget, QTableView, QFormLayout, QPushButton, QLabel, QLineEdit
    from PyQt5.QtGui import QStandardItemModel,QStandardItem
    from PyQt5.QtCore import QTimer,pyqtSignal,Qt
    from actionlib import ActionServer,ServerGoalHandle
    from demo_actions.msg import CountNumberAction,CountNumberGoal,CountNumberFeedback,CountNumberResult
    import rospy
    import threading
    
    
    class ActionServerWindow(QWidget):
        # 创建信号
        _update_signal = pyqtSignal()
    
        def __init__(self):
            super(ActionServerWindow, self).__init__()
    
            print threading.current_thread().name
    
            # 自定义 timer， 负责页面更新
            update_timer = QTimer(self)
            update_timer.setInterval(16)
            update_timer.start()
            # timer事件回调
            update_timer.timeout.connect(self.on_update)
    
            # 设置title
            self.setWindowTitle("")
    
            layout = QFormLayout()
            self.setLayout(layout)
    
            self.table = QTableView()
            layout.addRow(self.table)
    
            self.model = QStandardItemModel()
            self.table.setModel(self.model)
    
            # 为表格设计两个列
            self.model.setColumnCount(2)
            self.model.setHeaderData(0, Qt.Horizontal, "任务ID")
            self.model.setHeaderData(1, Qt.Horizontal, "终止操作")
    
            # 存放用户操作的数据
            self.map = {}
    
            # 绑定事件信号
            # btn = QPushButton("")
            # btn.clicked.connect(self.click)
            self._update_signal.connect(self.update_table)
    
            # 新建Action Server
            action_name = "/hello/action"
            self.server = ActionServer(action_name, CountNumberAction, self.goal_cb, self.cancel_cb, False)
            self.server.start()
    
        def goal_cb(self, handle):
            print threading.current_thread().name
    
            if not isinstance(handle, ServerGoalHandle):
                return
            # UI上需要显示 任务
            id = handle.get_goal_id().id
            self.map[id] = {
                "id": id,
                "isCanceled": False,
                "isAborted": False
            }
    
            # 在子线程中发送信号，调用ui更新
            self._update_signal.emit()
            # self.update_table()
    
            # 开启子线程，去执行任务
            thread = threading.Thread(target=self.do_goal, args=(handle,))
            thread.start()
    
        def update_table(self):
    
            # model清理
            self.model.clear()
    
            row = 0
            # 循环便利数据，将数据显示到table上
            for key in self.map.keys():
                value = self.map[key]
    
                self.model.setItem(row, 0, QStandardItem(value["id"]))
                self.model.setItem(row, 1, QStandardItem("xxxxxxxxxxxxxx"))
    
                btn = QPushButton("终止操作")
                btn.clicked.connect(lambda: self.do_aborted(value["id"]))
                self.table.setIndexWidget(self.model.index(row, 1), btn)
    
                row += 1
    
        def do_aborted(self, id):
            print "do_aborted: {}".format(id)
            # 修改记录的数据
            self.map[id]["isAborted"] = True
    
        def do_goal(self, handle):
            if not isinstance(handle, ServerGoalHandle):
                return
            # server接收到client goal指令
            id = handle.get_goal_id().id
    
            goal = handle.get_goal()
            if not isinstance(goal, CountNumberGoal):
                # 数据不符合要求
                handle.set_rejected()
                return
    
            # 1. 数据校验
            # 2. 完成业务
            # 3. 发布进度
            # 4. 发布结果
            # 5. 取消操作
            # 6. 中断操作
    
            # 1. 数据校验
            max = goal.max
            duration = goal.duration
            if max < 0 or duration < 0:
                handle.set_rejected()
                return
    
            # 数据校验成功后，手动更改状态为 Active
            handle.set_accepted()
    
            count = 0
            while not rospy.is_shutdown() and count < max:
                # 5. 取消操作:
                if self.map[id]["isCanceled"]:
                    break
    
                # 6. 中断操作
                if self.map[id]["isAborted"]:
                    break
    
                # 3. 发布进度
                feedback = CountNumberFeedback()
                feedback.percent = count * 100.0 / max
                handle.publish_feedback(feedback)
    
                # print feedback.percent
    
                # 2. 完成业务
                count += 1
                rospy.sleep(duration)
    
            # 4. 发布结果
            result = CountNumberResult()
            result.count = count
    
            if self.map[id]["isAborted"]:
                handle.set_aborted(result)
            elif self.map[id]["isCanceled"]:
                handle.set_canceled(result)
            else:
                handle.set_succeeded(result)
    
            # 清理数据
            del self.map[id]
            # 更新UI
            self._update_signal.emit()
    
        def cancel_cb(self, handle):
            if not isinstance(handle, ServerGoalHandle):
                return
    
            # 接收到取消的逻辑
            id = handle.get_goal_id().id
            # 设置数据
            self.map[id]["isCanceled"] = True
    
        def on_update(self):
            # qt刷新
            self.update()
    
            # 判断用户终止操作
            if rospy.is_shutdown():
                self.close()

py\_param\_get\_param\_names获取传的参数

result = rospy.get_param_names()
        for ele in result:
            value = rospy.get_param(ele)
            rospy.loginfo(value)

py\_qt+pyqtSignal自定义信号与曹

from PyQt5.QtCore import pyqtSignal
    
       # 自定义信号 全局变量
        updateUI = pyqtSignal()
    
            # 绑定自定义信号 定义在构造方法中
            self.updateUI.connect(self.handle)
            # 发送信号
            self.updateUI.emit()
    
        def handle(self):
            print '收到信号'

py\_qt\_connect\_class绑定信号和槽

# 绑定信号和槽
            self.btn.clicked.connect(self.click)
    
            def click(self):
                print '收到信号'

py\_thread\_class开启线程

import threading
    
            # 开启子线程，去执行任务
            thread = threading.Thread(target=self.do_goal, args=(handle,))
            thread.start()
    
            def do_goal(self, handle):
                 pass

py\_Gripper\_因时电动夹爪

# 导入串口库
    from serial import Serial
    
    class Gripper:
        def __init__(self,port):
            self.serial = Serial(port, 115200)
    
    
        def catch(self,speed=500,power=100):
            # 创建串口通讯类
            # 参数1：串口端口  /dev/ttyUSB0
            # 0xEB 0x90
            # 0x01
            # 0x05
            # 0x10
            # 0xF4 0x01 0x64 0x00
            # 校验和
            # B9
            # (1 Byte)
            # 0x6F
            b0b1 = b'\xEB\x90'
            b2 = b'\x01'
            b3 = b'\x05'
            b4 = b'\x10'
    
            # 获取低位
            b5 = bytearray([speed&0x00ff])
            b6 = bytearray([speed>>8])
            b7 = bytearray([power&0x00ff])
            b8 = bytearray([power>>8])
            # 把b2+b8 取低字节
            b9 = bytearray([(ord(b2)+ord(b3)+ord(b4)+ord(b5)+ord(b6)+ord(b7)+ord(b8))&0x00ff])
            data = b0b1+b2+b3+b4+b5+b6+b7+b8+b9
            # 写入串口数据 字节数组
            self.serial.write(data)
    
        def release(self,speed=500):
            # 0xEB 0x90
            # 0x01
            # 数据体长度
            # B3
            # (1 Byte)
            # 0x03
            # 指令号
            # B4
            # (1 Byte)
            # 0x11
            # 数据内容
            # B5B6
            # (1 Byte)
            # 0xF4 0x01
            # 校验和
            # B7
            # (1 Byte)
            # 0x0A
            b0b1 = b'\xEB\x90'
            b2 = b'\x01'
            b3 = b'\x03'
            b4 = b'\x11'
    
            b5 = bytearray([speed & 0x00ff])
            b6 = bytearray([speed >> 8])
    
            b7 = bytearray([(ord(b2)+ord(b3)+ord(b4)+ord(b5)+ord(b6))&0x00ff])
            data = b0b1 + b2 + b3 + b4 + b5 + b6 + b7
            # 写入串口数据 字节数组
            self.serial.write(data)
    
        def close(self):
            self.serial.close()
    
    gripper = Gripper('/dev/ttyUSB0')
    # gripper.catch(speed=100,power=80)
    gripper.release(speed=100)
    # catch()
    # release()

平移公式

py\_ros\_平移公式

import numpy as np
     
    # 已知的值
    # p点在b坐标系中的位置
    pb = (3, 4)
    # b坐标系的原点在a坐标系中的位置
    b = (3, 2)
    # 求救 p 在a坐标系中的位置
    matrix = np.array([  #交换矩阵
        [1, 0, b[0]],
        [0, 1, b[1]],
        [0, 0, 1],
    ])
     
    point = np.array([
        [pb[0]],
        [pb[1]],
        [1]
    ])
    pa = matrix.dot(point) #点乘

旋转公式

py\_ros\_旋转公式

import numpy as np
    from math import sqrt, sin, cos, radians
     
    # p在b坐标系中的位置
    pb = (12, 2)
     
    # b坐标系相对于a坐标系旋转的角度
    theta = radians(30)
     
    # 构建变换矩阵
    matrix = np.array([
        [cos(theta), -sin(theta)],
        [sin(theta), cos(theta)]
    ])
    point = np.array([
        [pb[0]],
        [pb[1]]
    ])
     
    # 求解
    pa = matrix.dot(point)

py\_ros\_旋转加平移公式

import numpy as np
    from math import sqrt, sin, cos, radians
     
    # p点在b坐标系中的位置
    pb = (sqrt(12), 2)
    # b坐标系相对于a坐标系的移动
    delta = (3, 2)
    # b坐标系相对于a坐标系的旋转
    theta = radians(30)
     
    # 变换矩阵
    matrix = np.array([
        [cos(theta), -sin(theta), delta[0]],
        [sin(theta), cos(theta), delta[1]],
        [0, 0, 1],
    ])
     
    point = np.array([
        [pb[0]],
        [pb[1]],
        [1]
    ])
     
    # p在a中的表达
    pa = matrix.dot(point)

# py\_ur3\_aubo5\_位置和姿态欧拉角转四元素 #

from moveit_commander import MoveGroupCommander
    
    from geometry_msgs.msg import Pose
    from tf import transformations
    from math import radians
    
    commander = MoveGroupCommander("manipulator_i5")
    //commander = MoveGroupCommander("manipulator")
     pose = Pose()
        pose.position.x = -0.282259
        pose.position.y = -0.444101
        pose.position.z = 0.580849 + 0.502
        # 欧拉角转四元素
        quat = transformations.quaternion_from_euler(radians(129.411392), radians(15.759084), radians(-33.136116))
        pose.orientation.x = quat[0]
        pose.orientation.y = quat[1]
        pose.orientation.z = quat[2]
        pose.orientation.w = quat[3]
        commander.set_pose_target(pose)

py\_ur3\_aubo5\_移动

from moveit_commander import MoveGroupCommander
    
    from geometry_msgs.msg import Pose
    from tf import transformations
    from math import radians
    
    commander = MoveGroupCommander("manipulator_i5")
    commander = MoveGroupCommander("manipulator")
    
        # commander.set_named_target("zero")
    
        pose = Pose()
        pose.position.x = -0.282259
        pose.position.y = -0.444101
        pose.position.z = 0.580849 + 0.502
        # 欧拉角转四元素
        quat = transformations.quaternion_from_euler(radians(129.411392), radians(15.759084), radians(-33.136116))
        pose.orientation.x = quat[0]
        pose.orientation.y = quat[1]
        pose.orientation.z = quat[2]
        pose.orientation.w = quat[3]
    
        commander.set_pose_target(pose)
        #
        success = commander.go()
        if success:
            rospy.loginfo("success")
        else:
            rospy.loginfo("failed")

#  opencv #

![20200717210025693.png][]

#from moviepy.editor import VideoFileClip

py\_opencv\_移动\_warpAffine

import cv2 as cv
    import numpy as np
    
    img = cv.imread("img/123.jpg" ,cv.IMREAD_COLOR)
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    # 定义位移矩阵 x移动50 y移动100
    matrixShift = np.float32([
                    [1,0,50],
                    [0,1,100]
                  ])
    # 调用api
    dstImg = cv.warpAffine(img,matrixShift,(width,height))
    
    cv.imshow("dst",dstImg)
    cv.waitKey(0)
    cv2.destroyAllWindows()

py\_opencv\_缩放\_resize

import  cv2 as cv
    
    # 读取一张图片
    img = cv.imread("img/123.jpg" , cv.IMREAD_COLOR)
    # 获取图片信息
    imgInfo = img.shape
    print(imgInfo)
    # 获取图片的高度
    height = imgInfo[0]
    # 获取图片的宽度
    width = imgInfo[1]
    # 获取图片的颜色模式,表示每个像素点由3个值组成
    mode = imgInfo[2]
    
    # 定义缩放比例
    newHeight = int(height*0.5)
    newWidth = int(width*0.5)
    # 使用api缩放
    newImg = cv.resize(img, (newWidth, newHeight))
    # 将图片展示出来
    cv.imshow("result",newImg)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_旋转\_warpAffine

img = cv.imread("img/123.jpg" ,cv.IMREAD_COLOR)
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    # 定义仿射矩阵： 参数1：中心点， 参数2：旋转角度，参数3：缩放系数
    matrixAffine = cv.getRotationMatrix2D((width * 0.5, height * 0.5), 45, 0.5)
    # 进行仿射变换
    dstImg = cv.warpAffine(img, matrixAffine, (width, height))
    
    cv.imshow("dstImg",dstImg)
    cv.waitKey(0)
    cv2.destroyAllWindows()

py\_opencv\_镜像

import cv2 as cv
    import numpy as np
    
    img = cv.imread("img/123.jpg", cv.IMREAD_COLOR)
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    
    # 创建一个两倍于原图大小的矩阵
    dstImg = np.zeros((height*2,width,3),np.uint8)
    
    # 向目标矩阵中填值
    for row in range(height):
        for col in range(width):
            # 上部分直接原样填充
            dstImg[row,col] = img[row,col]
            # 下半部分倒序填充
            dstImg[height*2-row-1,col] = img[row,col]
    
    
    # 显示图片出来
    cv.imshow("dstImg",dstImg)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_剪切

import cv2 as cv
    
    # 读取原图
    img = cv.imread("img/lena.jpg",cv.IMREAD_COLOR)
    cv.imshow("source",img)
    # 从图片（230,230） 截取一张 宽度130，高度70的图片
    dstImg = img[180:250,180:310]
    # 显示图片
    cv.imshow("result",dstImg)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_拉伸\_warpAffine

import cv2 as cv
    import numpy as np
    
    # 读取一张图片
    img = cv.imread("img/123.jpg" , cv.IMREAD_COLOR)
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    
    # 定义图片 左上角，左下角 右上角的坐标
    matrixSrc = np.float32([[0,0],[0,height-1],[width-1,0]])
    # 将原来的点映射到新的点
    matrixDst = np.float32([[50,100],[300,height-200],[width-300,100]])
    # 将两个矩阵组合在一起,仿射变换矩阵
    matrixAffine = cv.getAffineTransform(matrixSrc,matrixDst)
    
    dstImg = cv.warpAffine(img,matrixAffine,(width,height))
    
    cv.imshow("dstImg", dstImg)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_金子塔\_pyrDownUp

import cv2 as cv
    import numpy as np
    
    # 读取一张图片
    src_img = cv.imread("img/123.jpg" , cv.IMREAD_COLOR)
    imgInfo = src_img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    
    pry_down1 = cv.pyrDown(src_img)
    cv.imshow("down1",pry_down1)
    pry_down2 = cv.pyrDown(pry_down1)
    cv.imshow("down2",pry_down2)
    pry_down3 = cv.pyrDown(pry_down2)
    cv.imshow("down3",pry_down3)
    pry_down4 = cv.pyrDown(pry_down3)
    cv.imshow("down4",pry_down4)
    
    pyr_up1 = cv.pyrUp(pry_down1)
    cv.imshow("up1",pyr_up1)
    pyr_up2 = cv.pyrUp(pry_down2)
    cv.imshow("up2",pyr_up2)
    pyr_up3 = cv.pyrUp(pry_down3)
    cv.imshow("up3",pyr_up3)
    pyr_up4 = cv.pyrUp(pry_down4)
    cv.imshow("up4",pyr_up4)
    
    
    # 对比resize
    img2 = cv.resize(src_img,(int(height/2),int(width/2)))
    cv.imshow("img1/2",img2)
    
    img4 = cv.resize(src_img,(int(height/4),int(width/4)))
    cv.imshow("img1/4",img4)
    
    img8 = cv.resize(src_img,(int(height/8),int(width/8)))
    cv.imshow("img1/8",img8)
    
    img16 = cv.resize(src_img,(int(height/16),int(width/16)))
    cv.imshow("img1/16",img16)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_图像融合\_addWeighted

import cv2 as cv
    import numpy as np
    
    # 读取一张图片 两张图片尺寸需要一致
    itheima = cv.imread("img/123.jpg", cv.IMREAD_COLOR)
    cv.imshow("itheima",itheima)
    
    tony = cv.imread("img/333.jpg", cv.IMREAD_COLOR)
    cv.imshow("tony",tony)
    
    # 进行叠加时的插值
    dst = cv.addWeighted(itheima,0.5,tony,0.5,0)
    cv.imshow("dst",dst)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_灰度处理\_cvtColor

import cv2 as cv
    
    # 方式一 ： 直接以灰度图像的形式读取
    # img = cv.imread("img/123.jpg", cv.IMREAD_GRAYSCALE)
    # cv.imshow("dstImg",img)
    # cv.waitKey(0)
    
    # 方式二： 以彩图的方式读取
    img = cv.imread("img/123.jpg",cv.IMREAD_COLOR)
    # 将原图的所有颜色转成灰色
    dstImg = cv.cvtColor(img, cv.COLOR_BGR2GRAY)
    cv.imshow("dstImg",dstImg)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_灰图反转

import cv2 as cv
    import numpy as np
    
    # 将图片数据读取进来
    img = cv.imread("img/123.jpg",cv.IMREAD_GRAYSCALE)
    cv.imshow("img",img)
    # 获取原图信息
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    
    # 创建一个和原图同样大小的矩阵
    dstImg = np.zeros((height,width,1),np.uint8)
    
    for row in range(height):
        for col in range(width):
            # 获取原图中的灰度值
            gray = img[row,col]
            # 反转
            newColor = 255 - gray
            # 填充
            dstImg[row,col]=newColor
    
    cv.imshow("dstimg",dstImg)
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_彩图反转

import cv2 as cv
    import numpy as np
    
    # 将图片数据读取进来
    img = cv.imread("img/123.jpg",cv.IMREAD_COLOR)
    cv.imshow("img",img)
    # 获取原图信息
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    
    # 创建一个和原图同样大小的矩阵
    dstImg = np.zeros((height,width,3),np.uint8)
    
    for row in range(height):
        for col in range(width):
            # 获取原图中的灰度值
            (b,g,r) = img[row,col]
            # 反转
            new_b = 255-b
            new_g = 255-g
            new_r = 255-r
            # 填充
            dstImg[row,col]=(new_b,new_g,new_r)
    
    
    cv.imshow("dstimg",dstImg)
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_马赛克效果

import cv2 as cv
    import numpy as np
    
    # 将图片数据读取进来
    img = cv.imread("img/123.jpg",cv.IMREAD_COLOR)
    cv.imshow("img",img)
    # 获取原图信息
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    
    # 遍历要打马赛克的区域 宽度430 高度220
    for row in range(160,240):
        for col in range(380,670):
            # 每10×10的区域将像素点颜色改成一致
            if row%10==0 and col%10==0:
                # 获取当前颜色值
                (b,g,r) = img[row,col]
                # 将10×10区域内的颜色值改成一致
                for i in range(10):
                    for j in range(10):
                        img[row+i,col+j]= (b,g,r)
    
    # 显示效果图
    cv.imshow('dstimg',img)
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_毛玻璃效果

import cv2 as cv
    import numpy as np
    import random
    
    # 将图片数据读取进来
    img = cv.imread("img/123.jpg",cv.IMREAD_COLOR)
    cv.imshow("img",img)
    # 获取原图信息
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    
    # 创建一个和原图同样大小的空白矩阵
    dstImg = np.zeros((height,width,3),np.uint8)
    
    # 定义偏移量,表示从后面6个像素中随机选取一个颜色值
    offset=6
    
    # 向空白矩阵中填入颜色值
    for row in range(height):
        for col in range(width):
            # 计算随机数
            index = int(random.random()*offset)
            # 计算随机行号
            randomRow = row + index if row+index<height else height-1
            # 计算随机列号
            randomCol = col + index if col+index<width else width-1
            # 选择附近的一个像素点颜色
            (b,g,r) = img[randomRow,randomCol]
            # 填充到空白矩阵中
            dstImg[row,col]=(b,g,r)
    
    # 显示效果图
    cv.imshow('dstimg',dstImg)
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_图片浮雕效果

import cv2 as cv
    import numpy as np
    import random
    
    
    # 将图片数据读取进来
    img = cv.imread("img/123.jpg",cv.IMREAD_COLOR)
    cv.imshow("img",img)
    
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    
    # 将图片转成灰度图片
    grayImg = cv.cvtColor(img, cv.COLOR_BGR2GRAY)
    
    # 创建一张与原图相同大小的空白矩阵
    dstImg = np.zeros((height,width,1),np.uint8)
    
    # 向空白图片中填充内容
    for row in range(height):
        for col in range(width-1):
            # 获取当前像素值
            gray0 = grayImg[row,col]
            # 获取相邻一个像素点灰度
            gray1 = grayImg[row,col+1]
            # 计算新的灰度值
            gray = int(gray0)-int(gray1)+120
            # 校验gray是否越界
            gray = gray if gray<255 else 255
            gray = gray if gray>0 else 0
            # 将值填充到空白的矩阵中
            dstImg[row,col] = gray
    
    # 显示图片
    cv.imshow("dstimg",dstImg)
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_绘制图形\_line\_rectangle\_circle

import cv2 as cv
    import numpy as np
    import random
    
    # 创建一个空白的矩阵
    dstImg = np.zeros((400,600,3),np.uint8)
    
    # 绘制线段 参数2：起始点 参数3：结束点 参数4：颜色 参数5：线条宽度
    cv.line(dstImg,(50,10),(400,10),(255,255,0),10)
    # 扛锯齿
    cv.line(dstImg,(50,50),(400,50),(255,0,0),10,cv.LINE_AA)
    
    # 绘制一个三角形
    cv.line(dstImg,(50,350),(150,200),(255,0,0),10)
    cv.line(dstImg,(150,200),(300,350),(0,255,0),10)
    cv.line(dstImg,(300,350),(50,350),(0,0,255),10)
    
    # 绘制一个矩形 参数2： 左上角  参数3：右下角 参数4：颜色  参数5：线条宽度，若为负数，则填充整个矩形
    cv.rectangle(dstImg,(250,90),(470,180),(0,255,0),-1)
    
    # 绘制圆形 参数2：圆心  参数3：半径  参数4：颜色 参数5：线条宽度
    cv.circle(dstImg,(450,280),90,(0,0,255),5)
    
    # 显示图片
    cv.imshow("dstimg",dstImg)
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_文字图片绘制

# 将图片数据读取进来
    img = cv.imread("img/123.jpg",cv.IMREAD_COLOR)
    cv.imshow("img",img)
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    
    # 在图片上绘制矩形
    cv.rectangle(img,(380,150),(666,236),(0,255,0),5)
    
    # 绘制图片
    lenaImg = cv.imread("img/123.jpg",cv.IMREAD_COLOR)
    # 获取图片信息
    imgInfo = lenaImg.shape
    # 计算缩放图片宽高
    scale = 0.3
    height = int(imgInfo[0]*scale)
    width = int(imgInfo[1]*scale)
    # 缩放图片
    newLenaImg = cv.resize(lenaImg,(height,width))
    # 遍历
    for row in range(height):
        for col in range(width):
            img[50+row,100+col]=newLenaImg[row,col]
    
    cv.imshow('dstimg',img)
    cv.waitKey(0)
    cv.destroyAllWindows()

注意: opencv不支持中文显示,若想显示中文,需要额外安装中文字体库

py\_opencv\_直方图均衡化\_equalizeHist  美化加亮

import cv2 as cv
    import matplotlib.pyplot as plt
    img = cv.imread("img/itheima.jpg",cv.IMREAD_COLOR)
    
    b,g,r = cv.split(img)
    
    b_dst = cv.equalizeHist(b)
    g_dst = cv.equalizeHist(g)
    r_dst = cv.equalizeHist(r)
    # 会自己统计直方图，但是需要将多行数据转成单行数据
    plt.hist(equalize_img.ravel(),bins=256)
    plt.show()
    
    ret = cv.merge([b_dst,g_dst,r_dst])
    
    # 显示均衡化之后的图片
    cv.imshow("src",img)
    cv.imshow("equalize_img",ret)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_视频分解图片\_VideoCaptur

import cv2 as cv
    
    video = cv.VideoCapture("img/twotiger.avi")
    # 判断视频是否打开成功
    isOpened = video.isOpened()
    print("视频是否打开成功：",isOpened)
    # 获取图片的信息:帧率
    fps = video.get(cv.CAP_PROP_FPS)
    # 获取每帧宽度
    width = video.get(cv.CAP_PROP_FRAME_WIDTH)
    # 获取每帧的高度
    height = video.get(cv.CAP_PROP_FRAME_HEIGHT)
    print("帧率：{},宽度：{},高度：{}".format(fps,width,height))
    
    # 从视频中读取8帧信息
    count=0
    
    while count<8:
        count = count + 1
        # 读取成功or失败， 当前帧数据
        flag,frame = video.read()
        cv.imshow("frame1", frame);#显示视频
        # 将图片信息写入到文件中
        if flag:                                     # 保存图片的质量               
            cv.imwrite("img/tiger%d.jpg"%count,frame,[cv.IMWRITE_JPEG_QUALITY,100])
    
    print("图片截取完成啦！")

py\_opencv\_图片合成视频

import cv2 as cv
    
    # 读取一张图片
    img1 = cv.imread("img/tiger1.jpg",cv.IMREAD_COLOR)
    # 获取图片信息
    imgInfo = img1.shape
    # 定义宽高
    size = (imgInfo[1],imgInfo[0])
    # 定义视频写入 编码格式
    fourcc = cv.VideoWriter_fourcc(*'XVID')
    #                     输出视频名称              编码格式对象 帧率 大小
    videoWrite = cv.VideoWriter("img/tiger_copy2.avi",fourcc,4,size)
    
    for i in range(1,8):
        img = cv.imread("img/tiger%d.jpg"%i)
        videoWrite.write(img)
     
    
    # 养成良好习惯，释放资源
    videoWrite.release()
    cv.destroyAllWindows()
    
    print("生成视频结束！")

py\_opencv\_人脸识别\_detectMultiScale

import cv2 as cv
    # 第1步：加载xml文件
    faces_xml = cv.CascadeClassifier("assets/haarcascade_frontalface_default.xml")
    eyes_xml = cv.CascadeClassifier("assets/haarcascade_eye.xml")
    
    # 第2步：加载图片
    img = cv.imread("img/lena.jpg", cv.IMREAD_COLOR)
    
    # 第3步：将图片转成灰色图片
    gray = cv.cvtColor(img, cv.COLOR_BGR2GRAY)
    
    # 第4步：使用api进行人脸识别 参数2：缩放系数  参数3：至少要检测几次才算正确
    faces = faces_xml.detectMultiScale(gray, 1.3, 5)
    print("找到人脸的数量：",len(faces))
    
    # 在人脸上绘制矩形
    for (x,y,w,h) in faces:
        # 在找到人脸上画矩形
        cv.rectangle(img,(x,y),(x+w,y+h),(0,255,0),5)
    
        # 从灰色图片中找到人脸
        grayFace = gray[y:y+h,x:x+w]
        colorFace = img[y:y+h,x:x+w]
        # 在当前人脸上找到眼睛的位置
        eyes = eyes_xml.detectMultiScale(grayFace,1.3,5)
        print("当前人脸上眼睛数量：",len(eyes))
        # 在眼睛上绘制矩形
        for (e_x,e_y,e_w,e_h) in eyes:
            cv.rectangle(colorFace,(e_x,e_y),(e_x+e_w,e_y+e_h),(0,0,255),3)
    
    cv.imshow('result',img)
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_HSV颜色模型\_cvtColor

import cv2 as cv
    import numpy as np
    
    def average_brightness(img):
        """封装一个计算图片平均亮度的函数"""
        imgInfo = img.shape
        height = imgInfo[0]
        width = imgInfo[1]
    
        hsv_img = cv.cvtColor(img, cv.COLOR_BGR2HSV)
        # 提取出v通道信息
        v_day = cv.split(hsv_img)[2]
        # 计算亮度之和
        result = np.sum(v_day)
        # 返回亮度的平均值
        return result/(height*width)
    
    # 计算白天的亮度平均值
    day_img = cv.imread("assets/day.jpg", cv.IMREAD_COLOR)
    brightness1 = average_brightness(day_img)
    print("day brightness1:",brightness1);
    
    # 计算晚上的亮度平均值
    night_img = cv.imread("assets/night.jpg", cv.IMREAD_COLOR)
    brightness2 = average_brightness(night_img)
    print("night brightness2:",brightness2)
    
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_抠图合成\_inRange

import cv2 as cv
    # 1.读取绿幕图片
    green_img = cv.imread("img/lion.jpg", cv.IMREAD_COLOR)
    
    hsv_img = cv.cvtColor(green_img,cv.COLOR_BGR2HSV)
    # 2. 定义绿幕的颜色范围
    lower_green = (35,43,60)
    upper_green = (77,255,255)
    # 3. 使用inrange找出所有的背景区域
    mask_green = cv.inRange(hsv_img, lower_green, upper_green)
    
    # 复制狮子绿幕图片
    mask_img = green_img.copy()
    # 将绿幕图片，对应蒙板图片中所有不为0的地方全部改成0
    mask_img[mask_green!=0]=(0,0,0)
    cv.imshow("dst",mask_img)
    # itheima图片 对应蒙板图片为0的地方全都改成0,抠出狮子要存放的位置
    itheima_img = cv.imread("img/itheima.jpg", cv.IMREAD_COLOR)
    itheima_img[mask_green==0]=(0,0,0)
    cv.imshow("itheima",itheima_img)
    # 将抠出来的狮子与处理过的itheima图片加载一起
    result = itheima_img+mask_img
    cv.imshow("result",result)
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_简单二值图\_threshold    所使用的阈值,结果图片 = cv.threshold(img,阈值,最大值,类型)

import cv2 as cv
    """
        简单阈值
        彩图bgr（255,255,255） ---> 灰度图gray（255）---》二值图 0,1
        
        图像处理基本步骤：
         1.彩图
         2.灰度图
         3.二值图
         所使用的阈值,结果图片 = cv.threshold(img,阈值,最大值,类型)
    """
    src = cv.imread("../img/car.jpg")
    cv.imshow("src",src);
    # 转成灰度图
    gray = cv.cvtColor(src,cv.COLOR_BGR2GRAY);
    
    def onChange(val):
        # 直接调用api处理 返回值1：使用的阈值， 返回值2：处理之后的图像
        thresh, binary = cv.threshold(gray, val, 255, cv.THRESH_BINARY_INV);
        cv.imshow("binary", binary)
    
    onChange(0);
    # thresh = 120;
    # maxval = 255;
    # 直接调用api处理 返回值1：使用的阈值， 返回值2：处理之后的图像
    # thresh,binary = cv.threshold(gray,thresh,maxval,cv.THRESH_BINARY_INV);
    # cv.imshow("binary",binary)
    # 创建滑动条
    cv.createTrackbar("thresh","binary",0,255,onChange);
    
    cv.waitKey();
    cv.destroyAllWindows()

py\_opencv\_自适应二值图\_adaptiveThreshold

import cv2 as cv
    #自适应阈值
    # 读取图像
    img = cv.imread("assets/thresh1.jpg",cv.IMREAD_GRAYSCALE)
    # 显示图片
    cv.imshow("gray",img)
    # 获取图片信息
    imgInfo = img.shape
    
    # 直接调用api处理 参数1：图像数据 参数2：最大值  参数3：计算阈值的方法， 参数4：阈值类型 参数5：处理块大小  参数6：算法需要的常量C
    thresh_img = cv.adaptiveThreshold(img,255,cv.ADAPTIVE_THRESH_GAUSSIAN_C,cv.THRESH_BINARY,11,5)
    
    # 显示修改之后的图片
    cv.imshow("thresh",thresh_img);
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_自适应二值图大类间方差法\_THRESH\_OTSU

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 25][]

import cv2 as cv
    
    # 读取图像
    img = cv.imread("assets/otsu_test.png",cv.IMREAD_GRAYSCALE)
    cv.imshow("src",img)
    #所使用的阈值,结果图片 = cv.threshold(img,阈值,最大值,类型)
    # 直接调用api处理 返回值1：使用的阈值， 返回值2：处理之后的图像
    ret,thresh_img = cv.threshold(img, 225, 255, cv.THRESH_BINARY_INV)
    cv.imshow("normal", thresh_img);
    
    gaussian_img = cv.GaussianBlur(img,(5,5),0)
    cv.imshow("g",gaussian_img)
    # 直接调用api处理 返回值1：使用的阈值， 返回值2：处理之后的图像
    ret,thresh_img = cv.threshold(gaussian_img, 0, 255, cv.THRESH_BINARY|cv.THRESH_OTSU)
    cv.imshow("otsu", thresh_img);
    
    print("阈值：",ret)
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_均值滤波\_blur

import cv2 as cv
    
    img = cv.imread("./assets/itheima.jpg", cv.IMREAD_COLOR)
    cv.imshow("src",img)
    # 参数2: 滤波器的大小应该是奇数，这样它才有一个中心，例如3x3，5x5或者7x7
    dst = cv.blur(img, (3,3))
    cv.imshow("dst",dst)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_图片卷积\_filter2D

import cv2 as cv
    import numpy as np
    
    src = cv.imread("../img/itheima_salt.jpg");
    
    # 自定义卷积核
    kernel = np.array([[1,0,0],
                       [-2,9,0],
                       [1,-2,1]])
    print(kernel)
    
    dst = cv.filter2D(src,-1,kernel);
    cv.imshow("dst",dst);
    cv.imshow("src",src);
    cv.waitKey();
    cv.destroyAllWindows()

py\_opencv\_高斯模糊\_GaussianBlur

import cv2 as cv
    
    # 回调函数
    def updateSigma(val):
        # 高斯模糊   参数1:图像  参数2:卷积核大小, 参数3:标准差越大，去除高斯噪声能力越强，图像越模糊
        gaussian_blur = cv.GaussianBlur(img, (5,5), val)
        cv.imshow("gaussian",gaussian_blur)
    
    img = cv.imread("assets/itheima.jpg", cv.IMREAD_GRAYSCALE)
    cv.imshow("src",img)
    # 创建一个窗口
    cv.namedWindow("gaussian",cv.WINDOW_AUTOSIZE)
    # 创建一个窗口进度条: 参数1:名称 参数2:窗口名称  参数3: 起始值  参数4: 最大值, 参数5:回调函数
    cv.createTrackbar("sigma","gaussian",0,255,updateSigma)
    
    updateSigma(0)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_中值滤波\_medianBlur

import cv2 as cv
    img = cv.imread("./assets/itheima_salt.jpg", cv.IMREAD_COLOR)
    cv.imshow("src",img)
    # 参数2:3*3的像素
    dst = cv.medianBlur(img, 3)
    cv.imshow("dst",dst)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_Sobel算子边缘检测

import cv2 as cv
    
    img = cv.imread("./assets/brain.jpg",cv.IMREAD_GRAYSCALE)
    cv.imshow("src",img)
    
    # sobel算子  参数1:图像, 参数2:图像的深度 -1表示和原图相同, 参数3: x方向求导的阶数 参数4: y方向求导的阶数
    x_sobel = cv.Sobel(img, cv.CV_32F, 1, 0)
    # 将图像转成8位int
    x_sobel = cv.convertScaleAbs(x_sobel)
    
    cv.imshow("x sobel",x_sobel)
    
    
    # sobel算子
    #y_sobel = cv.Sobel(img, cv.CV_16S, 0, 1)
    # 将图像转成8位int
    #y_sobel = cv.convertScaleAbs(y_sobel)
    #cv.imshow("y_sobel",y_sobel)
    
    y_sobel = cv.Sobel(img,-1,0,1);#参数2 -1表示和原图相同,就不需要转8位int了
    cv.imshow("y_sobel",y_sobel);
    
    
    # 将x，y方向的内容叠加起来
    x_y_sobel = cv.addWeighted(x_sobel, 0.5, y_sobel, 0.5,0)
    cv.imshow("x,y sobel",x_y_sobel)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

y\_sobel = cv.Sobel(img,-1,0,1);\#参数2 -1表示和原图相同,就不需要转8位int了  
cv.imshow("y\_sobel",y\_sobel);

py\_opencv\_Scharr算子边缘检测

import cv2 as cv
    
    img = cv.imread("./assets/brain.jpg",cv.IMREAD_GRAYSCALE)
    cv.imshow("src",img)
    
    # sobel算子
    x_scharr = cv.Scharr(img, cv.CV_32F, 1, 0)
    # 将图像转成8位int
    x_scharr = cv.convertScaleAbs(x_scharr)
    cv.imshow("x scharr",x_scharr)
    
    # # sobel算子
    #y_scharr = cv.Scharr(img, cv.CV_16S, 0, 1)
    # 将图像转成8位int
    #y_scharr = cv.convertScaleAbs(y_scharr)
    #cv.imshow("y scharr",y_scharr)
    
    y_sobel = cv.Scharr(img,-1,0,1);#参数2 -1表示和原图相同,就不需要转8位int了
    cv.imshow("y_sobel",y_sobel);
    
    
    
    # 将x，y方向的内容叠加起来
    xy_scharr = cv.addWeighted(x_scharr, 0.5, y_scharr, 0.5,0)
    cv.imshow("x,y scharr",xy_scharr)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_Laplacian拉普拉斯算子边缘检测

import cv2 as cv
    
    img = cv.imread("./assets/grbq.jpg",cv.IMREAD_GRAYSCALE)
    cv.imshow("src",img)
    
    # 使用拉普拉斯算子
    #dst = cv.Laplacian(img,cv.CV_32F)
    # 取绝对值，将数据转到uint8类型
    #dst = cv.convertScaleAbs(dst)
    
    
    # 使用拉普拉斯算子
    dst = cv.Laplacian(img,-1)#参数2 -1表示和原图相同,就不需要转8位int了
    
    cv.imshow("dst",dst)
    
    cv.waitKey(0)
    cv.destroyAllWindows();

py\_opencv\_canny边缘检测 常用

import cv2 as cv
    import numpy as np
    import random
    
    # 将图片数据读取进来
    img = cv.imread("img/123.jpg",cv.IMREAD_COLOR)
    cv.imshow("img",img)
    
    # 1. 将图片转成灰度图片
    grayImg = cv.cvtColor(img, cv.COLOR_BGR2GRAY)
    
    # 2. canny算法  参数2: T2:T1 = 3:1 / 2:1 T2为高阈值，T1为低阈值
    dstImg = cv.Canny(grayImg,50,180)
    
    
    # 显示效果图
    cv.imshow('dstimg',dstImg)
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_bilateralFilter双边滤波磨皮

cv.bilateralFilter(输入图像, d, sigmaColor, sigmaSpace)

src: 输入图像  d: 表示在过滤过程中每个像素邻域的直径范围。如果这个值是非正数，则函数会从sigmaSpace计算该值。  sigmaColor: 颜色空间过滤器的sigma值，这个参数的值越大，表明该像素邻域内有越宽广的颜色会被混合到一起，产生较大的半相等颜色区域。 sigmaSpace: 坐标空间中滤波器的sigma值，如果该值较大，则意味着越远的像素将相互影响，从而使更大的区域中足够相似的颜色获取相同的颜色.

import cv2 as cv
    '''
    cv.bilateralFilter(输入图像, d, sigmaColor, sigmaSpace)
    
    src: 输入图像  d: 表示在过滤过程中每个像素邻域的直径范围。如果这个值是非正数，则函数会从sigmaSpace计算该值。  sigmaColor: 颜色空间过滤器的sigma值，这个参数的值越大，表明该像素邻域内有越宽广的颜色会被混合到一起，产生较大的半相等颜色区域。 sigmaSpace: 坐标空间中滤波器的sigma值，如果该值较大，则意味着越远的像素将相互影响，从而使更大的区域中足够相似的颜色获取相同的颜色.
    
    '''
    # 将图片数据读取进来
    img = cv.imread("img/timg.jpg",cv.IMREAD_COLOR)
    cv.imshow('img',img)
    # 双边滤波
    dstImg = cv.bilateralFilter(img, 10, 50, 50)
    # 显示改变之后的图像
    cv.imshow('newimg',dstImg)
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_filter2D锐化滤波

import cv2 as cv
    import numpy as np
    
    
    img = cv.imread("./assets/hehua.jpg",cv.IMREAD_COLOR)
    cv.imshow("src",img)
    
    kernel = np.array([
                        [-1,-1,-1],
                        [-1,9,-1],
                        [-1,-1,-1]])
    
    dst = cv.filter2D(img,-1,kernel)
    
    cv.imshow("sharpness filter",dst)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_HoughLinesP霍夫直线

import cv2 as cv
    import matplotlib.pyplot as plt
    import numpy as np
    
    # 1. 将图片以灰度的方式读取进来
    img = cv.imread("assets/weiqi.jpg", cv.IMREAD_COLOR)
    cv.imshow("src",img)
    
    gray_img = cv.cvtColor(img,cv.COLOR_BGR2GRAY)
    # cv.imshow("gray",gray_img)
    # 
    flag,thresh_img = cv.threshold(gray_img,100,255,cv.THRESH_BINARY_INV)
    cv.imshow("thresh_img",thresh_img)
    
    
    # 3. 霍夫变换
    #  线段以像素为单位的距离精度，double类型的，推荐用1.0
    rho = 1
    # 线段以弧度为单位的角度精度，推荐用numpy.pi/180
    theta = np.pi/180
    # 累加平面的阈值参数，int类型，超过设定阈值才被检测出线段，值越大，基本上意味着检出的线段越长，检出的线段个数越少。
    threshold=10
    # 线段以像素为单位的最小长度
    min_line_length=25
    # 同一方向上两条线段判定为一条线段的最大允许间隔（断裂），超过了设定值，则把两条线段当成一条线段，值越大，允许线段上的断裂越大，越有可能检出潜在的直线段
    max_line_gap = 3
    
    lines = cv.HoughLinesP(thresh_img,rho,theta,threshold,minLineLength=min_line_length,maxLineGap=max_line_gap)
    
    dst_img = img.copy()
    
    for line in lines:
        x1,y1,x2,y2 = line[0]
        cv.line(dst_img,(x1,y1),(x2,y2),(0,0,255),2)
    
    cv.imshow("dst img",dst_img)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_HoughCircles霍夫直线

import cv2 as cv
    import numpy as np
    
    
    img = cv.imread("assets/weiqi.jpg", cv.IMREAD_COLOR)
    cv.imshow("src",img)
    # 将图片转成灰色图片
    gray_img = cv.cvtColor(img,cv.COLOR_BGR2GRAY)
    
    
    # 霍夫圆形检测
    def hough_circle(gray_img):
        # 定义检测图像中圆的方法。目前唯一实现的方法是cv2.HOUGH_GRADIENT
        method = cv.HOUGH_GRADIENT
        # 累加器分辨率与图像分辨率的反比。例如，如果dp = 1，则累加器具有与输入图像相同的分辨率。如果dp = 2，则累加器的宽度和高度都是一半。
        dp = 1
        # 检测到的圆的圆心之间最小距离。如果minDist太小，则可能导致检测到多个相邻的圆。如果minDist太大，则可能导致很多圆检测不到。
        minDist = 20
        # param1 Canny算法阈值上线
        # param2 cv2.HOUGH_GRADIENT方法的累加器阈值。阈值越小，检测到的圈子越多。
        # minRadius : 最小的半径，如果不确定，则不指定
        # maxRadius : 最大的半径，若不确定，则不指定
        circles = cv.HoughCircles(gray_img,method,dp,minDist=minDist,param1=70,param2=30,minRadius=0,maxRadius=20)
    
        for circle in circles[0,:]:
            # 圆心坐标，半径
            x,y,r = circle
            # 绘制圆心
            cv.circle(img,(x,y),2,(0,255,0),1)
            # 绘制圆形
            cv.circle(img,(x,y),r,(0,0,255),2)
    
        cv.imshow("result",img)
    
    # 调用函数，寻找霍夫圆
    hough_circle(gray_img)
    
    cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_使用matplotlib绘制直方图有两种方式  -----------------------------

方式一:
        # 使用api将直方图数据计算好 图片 通道  掩膜  数量  值的范围
        hist = cv.calcHist([grayImg],[0],None,[256],[0.0,255.0])
        # 调用plot函数显示
        plt.plot(hist,color="green")
        plt.show()
    方式二:
        # 1.使用Img.ravel()将多行的矩阵转成单行的矩阵
        # 2. 然后调用matplot的hist函数自动计算直方图,bins表示像素区间数量
        plt.hist(grayImg.ravel(),color="red",bins=256)
        plt.show()

py\_opencv\_findContours边缘与轮廓\_及轮廓信息

import cv2 as cv
    # 彩图 ---》 灰度图 ---》 二值图
    src = cv.imread("../img/shape.jpg");
    
    gray = cv.cvtColor(src,cv.COLOR_BGR2GRAY);
    
    # 将灰度图转成二值图
    thresh , binary = cv.threshold(gray,0,255,cv.THRESH_BINARY_INV|cv.THRESH_OTSU);
    
    # 查找轮廓 4.x 3.4
    _,contours,hierarchy = cv.findContours(binary,cv.RETR_EXTERNAL,cv.CHAIN_APPROX_SIMPLE);
    
    
    
    print("找到的轮廓数量：",len(contours));
    #hierarchy[i][3]，分别表示第i个轮廓的后一个轮廓、前一个轮廓、父轮廓、内嵌轮廓的索引编号
    print("轮廓的层级关系：",hierarchy);
    
    print("第0个轮廓点的数量：",len(contours[0]))
    #                           轮廓的索引   -1 绘制所有轮廓
    cv.drawContours(src,contours,0,(255,255,0),2);
    
    # 遍历每一个轮廓
    for contour in contours:
        # 计算轮廓的面积
        area = cv.contourArea(contour);
        print("面积：",area);
        # 外切圆
        center,radius = cv.minEnclosingCircle(contour);
        x = int(center[0])
        y = int(center[1])
        radius = int(radius)
        cv.circle(src,(x,y),radius,(255,0,0),2);
        # 包围矩形
        rect = cv.boundingRect(contour);
        x,y,w,h = rect;
        cv.rectangle(src,(x,y),(x+w,y+h),(0,255,0),2);
    
        # 最小包围矩形
        ratationRect = cv.minAreaRect(contour);
        # print(ratationRect);
    
        length = cv.arcLength(contour,True);
        print("周长：",length);
    
    cv.imshow("src",src);
    cv.imshow("binary",binary);
    # cv.imshow("gray",gray);
    cv.waitKey();
    cv.destroyAllWindows()

py\_opencv\_dilate膨胀

import cv2 as cv
    
    # src = cv.imread("../img/morph-j.jpg")
    src = cv.imread("../img/lena.jpg")
    
    kernel = cv.getStructuringElement(cv.MORPH_RECT,(10,10));
    print(kernel)
    # 膨胀
    dst = cv.dilate(src,kernel);
    
    cv.imshow("dst",dst);
    cv.imshow("src",src);
    cv.waitKey();
    cv.destroyAllWindows()

py\_opencv\_erode腐蚀

import cv2 as cv
    
    src = cv.imread("../img/morph-j.jpg")
    src = cv.imread("../img/lena.jpg")
    
    kernel = cv.getStructuringElement(cv.MORPH_RECT,(5,5));
    
    dst = cv.erode(src,kernel);
    cv.imshow("dst",dst);
    cv.imshow("src",src);
    cv.waitKey();
    cv.destroyAllWindows()

py\_opencv\_morphologyEx\_开操作Opening

import cv2 as cv
    
    src = cv.imread("../img/morph-opening.jpg")
    
    
    # blur_img = cv.medianBlur(src,5)
    # cv.imshow("blur img",blur_img)
    kernel = cv.getStructuringElement(cv.MORPH_RECT,(3,3))
    
    # 开操作 : 先腐蚀，后膨胀
    dst = cv.morphologyEx(src,cv.MORPH_OPEN,kernel)
    cv.imshow("dst",dst)
    
    # # 腐蚀
    # erode_img = cv.erode(src,kernel)
    # cv.imshow("erode_img",erode_img)
    #
    # # 膨胀
    # dilate_img = cv.dilate(erode_img,kernel)
    # cv.imshow("dilate_img",dilate_img)
    
    cv.imshow("src",src)
    cv.waitKey()
    cv.destroyAllWindows()

py\_opencv\_morphologyEx\_闭操作Closing

import cv2 as cv
    
    src = cv.imread("../img/morph-closing.jpg")
    
    kernel = cv.getStructuringElement(cv.MORPH_RECT,(3,3))
    # 先对图像进行膨胀
    # dilate_img = cv.dilate(src,kernel)
    # cv.imshow("dilate",dilate_img)
    #
    # # 腐蚀
    # erode_img = cv.erode(dilate_img,kernel)
    # cv.imshow("erode_img",erode_img)
    
    dst = cv.morphologyEx(src,cv.MORPH_CLOSE,kernel)
    
    cv.imshow("dst",dst)
    cv.imshow("src",src)
    cv.waitKey()
    cv.destroyAllWindows()

py\_opencv\_matchTemplate模板匹配

import cv2 as cv
    
    # 原图
    src = cv.imread("../img/zhaonimei.jpg")
    # 模板图
    temp = cv.imread("../img/mei.jpg")
    h,w = temp.shape[0:2]
    
    # 模板匹配
    res = cv.matchTemplate(src,temp,cv.TM_SQDIFF_NORMED)
    print(res)
    # 找出最小值出现的位置
    minVal, maxVal, minLoc, maxLoc = cv.minMaxLoc(res)
    print("最小值：{}，最大值：{}，minLoc={},maxloc={}".format(minVal,maxVal,minLoc,maxLoc))
    
    
    # 绘制找到的位置
    cv.circle(src,minLoc,2,(0,0,255),2)
    cv.rectangle(src,minLoc,(minLoc[0]+w,minLoc[1]+h),(255,255,0),2)
    
    
    cv.imshow("src",src)
    cv.imshow("temp",temp)
    cv.waitKey()
    cv.destroyAllWindows()

py\_opencv\_normalize将结果进行归一化处理

# 将结果进行归一化处理
    cv.normalize(result,result,0,1,cv.NORM_MINMAX)

py\_opencv\_createBackgroundSubtractorMOG2背景消除

import numpy as np
    import numpy.random as rnd;
    import cv2
    
    cap = cv2.VideoCapture('../img/vtest.avi')
    
    fgbg = cv2.createBackgroundSubtractorMOG2(detectShadows=True);
    
    while(1):
        ret, frame = cap.read()
    
        fgmask = fgbg.apply(frame)
    
        blur_img = cv2.medianBlur(fgmask,5);
    
        cv2.imshow('frame',blur_img)
    
        _,contours,_ = cv2.findContours(blur_img,cv2.RETR_EXTERNAL,cv2.CHAIN_APPROX_SIMPLE);
        for contour in contours:
            area = cv2.contourArea(contour);
            if area >1000:
                x,y,w,h = cv2.boundingRect(contour);
                cv2.rectangle(frame,(x,y),(x+w,y+h),(rnd.randint(0,255),rnd.randint(0,255),rnd.randint(0,255)),2)
    
        cv2.imshow("src",frame);
        k = cv2.waitKey(30) & 0xff
        if k == 27:
            break
    
    cap.release()
    cv2.destroyAllWindows()

py\_opencv\_fillPoly绘制多边形

# 绘制多边形  三角形的三个点
        polygon = np.array([[[260,height],[1100,height],[570,283]]])
    
        # 创建一个空白的画布
        mask_img = np.zeros_like(img);
        # 填充空白的画布： 三角形 . 绘制一个填充的三角形
        cv.fillPoly(mask_img,polygon,255);
    
        cv.imshow("mask",mask_img);

py\_opencv\_convertScaleAbs数据类型转换

# 使用拉普拉斯算子
    #dst = cv.Laplacian(img,cv.CV_32F)
    # 取绝对值，将数据转到uint8类型
    #dst = cv.convertScaleAbs(dst)

py\_opencv\_glob获取路径下所有文件

import numpy as np
        import cv2
        import glob
        for fname in glob.glob('image_*.jpg'):
            img = cv2.imread(fname)
            gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
            ret, corners = cv2.findChessboardCorners(gray, (6, 9), None)

py\_opencv\_fillPoly\_bitwise\_and填充ROI掩膜\_将感兴趣区域填充成白色

h, w = img.shape[:2]
        lower = 150
        upper = 255
        dst = cv2.Canny(img2, lower, upper)
        roi = np.array([
            [200, 20], [600, 20],
            [600, 320], [200, 320]
        ], dtype=np.int32)
        # 创建纯黑的原图掩膜
        roi_mask = np.zeros([h, w], np.uint8)
        # 填充ROI掩膜，将感兴趣区域填充成白色
        cv.fillPoly(roi_mask, [roi], 255)
        # 通过像素位与操作保留刚刚掩膜中白色的区域
         img_roi = cv.bitwise_and(dst, roi_mask)

py\_opencv\_inRange\_createTrackbar\_HSV多参数调参

i1 = 0
    i2 = 0
    i3 = 0
    i4 = 0
    i5 = 0
    i6 = 0
    def onChange(a,b):
        print(a)
        print(b)
        global i1,i2,i3,i4,i5,i6
        if a==1:
            i1 = b
        elif a==2:
            i2 = b
        elif a == 3:
            i3 = b
        elif a == 4:
            i4 = b
        elif a == 5:
            i5 = b
        elif a == 6:
            i6 = b
        lowerb = (i1, i2, i3)
        upperb = (i4, i5, i6)
        mask = cv.inRange(hsv, lowerb, upperb)
        cv.imshow("mask", mask)
        print(i1,i2,i3,i4,i5,i6)
    
    if __name__ == '__main__':
        img = cv.imread("data/pic9.png")
        cv.imshow("img", img)
        hsv=cv.cvtColor(img,cv.COLOR_BGR2HSV)
        cv.namedWindow("mask")
        cv.createTrackbar("h1", "mask", 0, 255, lambda a : onChange(1,a))
        cv.createTrackbar("s1", "mask", 0, 255, lambda a: onChange(2, a))
        cv.createTrackbar("v1", "mask", 0, 255, lambda a: onChange(3, a))
        cv.createTrackbar("h2", "mask", 0, 255, lambda a: onChange(4, a))
        cv.createTrackbar("s2", "mask", 0, 255, lambda a: onChange(5, a))
        cv.createTrackbar("v2", "mask", 0, 255, lambda a: onChange(6, a))
        cv.waitKey(0)
    cv.destroyAllWindows()

py\_opencv\_findContours\_minAreaRect\_getRotationMatrix2D查找轮廓按最小矩形旋转   ====

_, contours, hierarchy = cv2.findContours(binary, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
        print(len(contours))
        for contour in contours:
            rect=cv2.minAreaRect(contour)
            x1=int(rect[0][0])
            y1=int(rect[0][1])
            w1=int(rect[1][0])
            h1=int(rect[1][1])
            angle=rect[2]
            robot =cv2.getRotationMatrix2D((x1,y1),angle,1)
            img_rotated_by_alpha = cv2.warpAffine(img, robot, (img.shape[1], img.shape[0]))
            print("img_rotated_by_alpha{}".format(img_rotated_by_alpha))
            cv2.imshow("robot", img_rotated_by_alpha)
       cv2.destroyAllWindows()

py\_opencv\_findContours查找轮廓绘画矩形\_最小矩形\_外切园

_, contours, hierarchy = cv2.findContours(binary, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
    print("找到轮廓个数:", len(contours))
    temp_img = img.copy()
    cv2.drawContours(temp_img, contours, -1, (0, 255, 255), 3)
    for i, cnt in enumerate(contours):
        # cv2.drawContours(img, contours, i, (0, 255, 255), 2)
        # 获取矩形区域
        x, y, w, h = cv2.boundingRect(cnt)
    
        # 计算多边形的矩
        mm = cv2.moments(cnt)
        if mm['m00'] == 0:
            continue
        cx = mm['m10'] / mm['m00']
        cy = mm['m01'] / mm['m00']
    
        # 计算周长
        cnt_len = cv2.arcLength(cnt, True)
        # 获取近似曲线
        # 参数2：epsilon 逼近程度阈值
        # 参数1：close 是否为闭合区域
        approxCurve = cv2.approxPolyDP(cnt, cnt_len * 0.02, True)
        curve = approxCurve.shape[0]
    
        # 计算轮廓的面积
        area = cv2.contourArea(cnt)
        print(cv2.isContourConvex(cnt))
        # 面积大于1000, 边个数至少4个
        if area > 1000 and curve >= 4:
            # 绘制正矩形框
            cv2.rectangle(final_img,(x,y),(x+w,y+h),(0,255,0),3)
            # 绘制中心
            cv2.circle(final_img, (np.int(cx), np.int(cy)), 5, (0, 0, 255), -1)
            # 计算最小矩形区域
            rect = cv2.minAreaRect(cnt)
            # 获取盒子顶点
            # 绘制最小矩形 1.对应左下角，2.对应左上角，3.对应右上角，4对应右下角
            # box: [[464 311] 1.对应左下角
            #       [246 237] 2.对应左上角
            #       [263 186] 3.对应右上角
            #       [481 259]]4对应右下角
            box = cv2.boxPoints(rect)
            # 转成long类型
            box = np.int0(box)
            # 绘制最小矩形
            cv2.drawContours(final_img, [box], 0, (255, 0, 0), 2)
            # cv2.drawContours(final_img, contours, i, (255, 0, 0), 3)
            print("{}------宽高比: {} 中心: {} 面积: {} 边个数：{}".format(i, min(w, h) / max(w, h), \
                                                                (round(cx,2),(round(cy,2))), area, curve))

py\_opencv\_findContours查找轮廓最小矩形外切矩形

#binary 二值图
     _, contours, hierarchy = cv2.findContours(binary, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
        for contour in contours:
            # 计算最小矩形区域
            rect=cv2.minAreaRect(contour)
            x1 = int(rect[0][0]) #中心点
            y1 = int(rect[0][1]) #中心点
            w1 = int(rect[1][0]) #宽
            h1 = int(rect[1][1]) #高
            angle = rect[2]  # 角度
            # 获取盒子顶点
            box = cv2.boxPoints(rect)
            # 转成long类型
            box = np.int0(box)
            # 绘制最小矩形 1.对应左下角，2.对应左上角，3.对应右上角，4对应右下角
            # box: [[464 311] 1.对应左下角
            #       [246 237] 2.对应左上角
            #       [263 186] 3.对应右上角
            #       [481 259]]4对应右下角
            cv2.drawContours(img, [box], 0, (255, 0, 255), 2)
    
        x3=int(box[0][0])   #左下角 宽 cols w
        y3=int(box[0][1])   #左下角 高 rows h
        x2=int(box[1][0])   #左上角 宽 cols w
        y2=int(box[1][1])   #左上角 高 rows h
        x1=int(box[2][0])   #右上角 宽 cols w
        y1=int(box[2][1])   #右上角 高 rows h
        x4=int(box[3][0])   #右下角 宽 cols w
        y4=int(box[3][1])   #右下角 高 rows h
        # 边框
        cv2.drawContours(image_copy, [box], 0, (255, 0, 255), 2)
        #cv2.line(image_copy,(x2-x1,y2-y1),(x3-x4,y3-y4),(255,255,0),1)
        print("x2-x1:{}".format(x2-x1))
        y = int((y3 - y2) / 2)  #取高度的中间点 2分之一的线段长度
        x = int((x4 - x3) / 2)  #取高度的中间点 2分之一的线段长度
        #cv2.line(image_copy, (y2,  x2), (y1,  x1), (255,0 , 0), 3)
        # 分成4格
        cv2.line(image_copy, (x1  ,  y1+y), (x2  ,y1+y), (255,255, 0), 3)  # 中心横线
        cv2.line(image_copy, (x2+x, y2   ), (x3+x, y3 ), (255,255, 0), 3)  #左中心竖线
        # 边框
        cv2.line(image_copy, (x1 , y1 ), (x2 , y1), (255, 0, 0), 3)    # 上边框
        cv2.line(image_copy, (x2 , y2),  (x3 , y3), (255, 0, 0), 3)    # 左边框
        cv2.line(image_copy, (x3 , y3),  (x4 , y4), (255, 0, 0), 3)    # 下边框
        cv2.line(image_copy, (x4 , y4),  (x1 , y1), (255, 0, 0), 3)    # 右边框
        #中心点  4分之一的线段长度
        x_4= int((x4 - x3) / 4)  # 取宽度的中间点  4分之一的线段长度
        y_4 = int((y3 - y2) / 4)  # 取高度的中间点 4分之一的线段长度
         # 1.中心点 坐标
        x_z=x2 + x # 宽 cols w
        y_z=y1 + y # 高 rows h
        cv2.circle(image_copy, (x_z, y_z), 5, (255, 0, 255), -1)

py\_opencv\_findContours查找轮廓最小矩形\_绘制中心点\_及各边框\_分格

_,contours, hierarchy = cv2.findContours(image_OPEN,cv2.RETR_EXTERNAL,cv2.CHAIN_APPROX_SIMPLE)
        print(len(contours))
        maxarea=0
        maxarea_index=0
        for index,contour in enumerate(contours):
            area = cv2.contourArea(contour)
            print(area)
            if area >maxarea:
                maxarea=area
                maxarea_index=index
                print("index{}".format(index))
        # 最小矩形
        rect = cv2.minAreaRect(contours[maxarea_index])
        x1 = int(rect[0][0]) #中心点
        y1 = int(rect[0][1]) #中心点
        w1 = int(rect[1][0]) #宽
        h1 = int(rect[1][1]) #高
        angle = rect[2]  # 角度
        #cv2.drawContours(image_copy,contours,maxarea_index,(255,0,0),1)
        box = cv2.boxPoints(rect)
        box= np.int0(box)
        print("box：{}".format(box))
        x3=int(box[0][0])   #左下角 宽 cols w
        y3=int(box[0][1])   #左下角 高 rows h
        x2=int(box[1][0])   #左上角 宽 cols w
        y2=int(box[1][1])   #左上角 高 rows h
        x1=int(box[2][0])   #右上角 宽 cols w
        y1=int(box[2][1])   #右上角 高 rows h
        x4=int(box[3][0])   #右下角 宽 cols w
        y4=int(box[3][1])   #右下角 高 rows h
        # 边框
        cv2.drawContours(image_copy, [box], 0, (255, 0, 255), 2)
        #cv2.line(image_copy,(x2-x1,y2-y1),(x3-x4,y3-y4),(255,255,0),1)
        print("x2-x1:{}".format(x2-x1))
        y = int((y3 - y2) / 2)  #取高度的中间点 2分之一的线段长度
        x = int((x4 - x3) / 2)  #取高度的中间点 2分之一的线段长度
        #cv2.line(image_copy, (y2,  x2), (y1,  x1), (255,0 , 0), 3)
        # 分成4格
        cv2.line(image_copy, (x1  ,  y1+y), (x2  ,y1+y), (255,255, 0), 3)  # 中心横线
        cv2.line(image_copy, (x2+x, y2   ), (x3+x, y3 ), (255,255, 0), 3)  #左中心竖线
        # 边框
        cv2.line(image_copy, (x1 , y1 ), (x2 , y1), (255, 0, 0), 3)    # 上边框
        cv2.line(image_copy, (x2 , y2),  (x3 , y3), (255, 0, 0), 3)    # 左边框
        cv2.line(image_copy, (x3 , y3),  (x4 , y4), (255, 0, 0), 3)    # 下边框
        cv2.line(image_copy, (x4 , y4),  (x1 , y1), (255, 0, 0), 3)    # 右边框
        #中心点  4分之一的线段长度
        x_4= int((x4 - x3) / 4)  # 取宽度的中间点  4分之一的线段长度
        y_4 = int((y3 - y2) / 4)  # 取高度的中间点 4分之一的线段长度
         # 1.中心点 坐标
        x_z=x2 + x # 宽 cols w
        y_z=y1 + y # 高 rows h
        cv2.circle(image_copy, (x_z, y_z), 5, (255, 0, 255), -1)
        string_lup = "x {}  y {}".format(x_z, y_z)
        cv2.putText(image_copy, string_lup, (x_z - 50, y_z - 20), cv2.FONT_HERSHEY_SIMPLEX,
                    0.5, (255, 0, 255), 1, cv2.LINE_AA)
        # 1.左上
        x_lup = x2+x_4 # 宽 cols w
        y_lup = y1+y_4 # 高 rows h
        cv2.circle(image_copy,(x_lup,y_lup),5,(255,0,0),-1)
        string_lup="x {}  y {}".format(x_lup,y_lup)
        cv2.putText(image_copy, string_lup, (x_lup-50, y_lup-20), cv2.FONT_HERSHEY_SIMPLEX,
                    0.5, (255,0, 0), 1, cv2.LINE_AA)
        # 1.左下
        x_ld=  x2 + x_4 # 宽 cols w
        y_ld = y1 + y_4 + y # 高 rows h
        cv2.circle(image_copy, (x_ld, y_ld), 5, (255, 0, 0), -1)
        string_lup = "x {}  y {}".format(x_ld, y_ld)
        cv2.putText(image_copy, string_lup, (x_ld - 50, y_ld - 20), cv2.FONT_HERSHEY_SIMPLEX,
                    0.5, (255, 0, 0), 1, cv2.LINE_AA)
        # 1.右上
        x_rup = x2 + x_4 +x # 宽 cols w
        y_rup = y1 + y_4 # 高 rows h
        cv2.circle(image_copy, (x_rup, y_rup), 5, (255, 0, 0), -1)
        string_lup = "x {}  y {}".format(x_rup, y_rup)
        cv2.putText(image_copy, string_lup, (x_rup - 50, y_rup - 20), cv2.FONT_HERSHEY_SIMPLEX,
                    0.5, (255, 0, 0), 1, cv2.LINE_AA)
        # 1.右下
        x_rd= x2 + x_4 + x # 宽 cols w
        y_rd = y1 + y_4+ y # 高 rows h
        cv2.circle(image_copy, (x_rd, y_rd), 5, (255, 0, 0), -1)
        string_lup = "x {}  y {}".format(x_rd, y_rd)
        cv2.putText(image_copy, string_lup, (x_rd - 50, y_rd - 20), cv2.FONT_HERSHEY_SIMPLEX,
                    0.5, (255, 0, 0), 1, cv2.LINE_AA)
        cv2.imshow("image_copy_drawContours", image_copy)
        cv2.destroyAllWindows()

py\_opencv\_warpPerspective透视拉伸

# 将目标区域梯形转成 300x300 正方形区域
                dst_found = True
                #原
                pts1 = np.float32([rst_optimited[0], rst_optimited[3], rst_optimited[1],  rst_optimited[2]])
                #300 300
                pts2 = np.float32([[0, 0], [rows, 0], [0, rows], [rows, rows]])
                M = cv2.getPerspectiveTransform(pts1, pts2)
                dst_area = cv2.warpPerspective(src, M, (rows, rows))

py\_opencv\_np\_zeros创建新的空图片

dstImg = np.zeros((height, width, 1), np.uint8)
        # 定义图片 左上角，左下角 右上角的坐标
        matrixSrc = np.float32([[0, 0], [0, height - 1], [width - 1, 0]])
        # 将原来的点映射到新的点
        matrixDst = np.float32([[50, 100], [300, height - 200], [width - 300, 100]])

py\_opencv\_保留感兴趣区域ROI

h, w = img2.shape[:2]
    roi = np.array([
        [200, 20], [600, 20],
        [600, 320],[200, 320]
    ], dtype=np.int32)
    # 创建纯黑的原图掩膜
    roi_mask = np.zeros([h,w], np.uint8)
    # 填充ROI掩膜，将感兴趣区域填充成白色
    cv2.fillPoly(roi_mask, [roi], 255)
    # 通过像素位与操作保留刚刚掩膜中白色的区域
    img_roi = cv2.bitwise_and(dst, roi_mask)
    #=====================================
    # 获取上半段工作台图
    dstImg[:int(rows/2),:]=255
    image_copy=cv2.bitwise_and(image_copy2,dstImg)

py\_opencv\_bitwise二值文件黑白颠倒

cv2.bitwise_not(image_OPEN, image_OPEN)# 颜色反转 二值文件黑白颠倒

c++ 模板:

cpp\_ros\_main\_node节点初始化

#include <iostream>
    #include <ros/ros.h>
    using namespace std;
    
    int main(int argc,char *argv[]){
        //节点名
        string nodeName = "$args1$";
        //初始化节点
        ros::init(argc,argv,nodeName);
        //创建节点
        ros::NodeHandle node;
        $args2$
        //事件轮询
        ros::spin();
        return 0;
    }

cpp\_ros\_node节点

//创建节点
        ros::NodeHandle node;

1.  cpp\_qt\_class\_source\_Qt5

#include <QWidget>
    #include <QVBoxLayout>
    #include <QHBoxLayout>
    #include <QPushButton>
    #include <QLineEdit>
    #include <QCheckBox>
    #include <ros/ros.h>
    #include <std_srvs/Empty.h>
    #include <turtlesim/Spawn.h>
    #include <turtlesim/Kill.h>
    #include <turtlesim/SetPen.h>
    #include <turtlesim/TeleportAbsolute.h>
    #include <turtlesim/TeleportRelative.h>
    #include <iostream>
    #include "MainWindow.h"
    
    MainWindow::MainWindow(ros::NodeHandle node, QWidget *parent) : QWidget(parent), node(node)
    {
        
    }
    
    MainWindow::~MainWindow() {
    ros::shutdown();
    }

2.   cpp\_qt\_class\_head\_Qt5

#include <QWidget>
    #include <QVBoxLayout>
    #include <QHBoxLayout>
    #include <QPushButton>
    #include <QLineEdit>
    #include <QCheckBox>
    #include <ros/ros.h>
    #include <std_srvs/Empty.h>
    #include <turtlesim/Spawn.h>
    #include <turtlesim/Kill.h>
    #include <turtlesim/SetPen.h>
    #include <turtlesim/TeleportAbsolute.h>
    #include <turtlesim/TeleportRelative.h>
    #include <iostream>
    
    using namespace std;
    class MainWindow: public QWidget {
    
    public:
        explicit MainWindow(ros::NodeHandle node,QWidget* parent = Q_NULLPTR);
    
        ~MainWindow() override;
    
    };

**3.server  **

cpp\_ros\_client\_main通讯

#include <iostream>
    #include <ros/ros.h>
    #include <roscpp_tutorials/TwoInts.h>
    using namespace std;
    
    int main(int argc,char *argv[]){
        //节点名
        string nodeName = "cpp_client";
        //初始化节点
        ros::init(argc,argv,nodeName,ros::init_options::AnonymousName);
        //创建节点
        ros::NodeHandle node;
        //service名字
        string serviceName = "cpp_service";
        //创建client
        ros::ServiceClient client = node.serviceClient<roscpp_tutorials::TwoInts>(serviceName);
        //等待server端上线
        client.waitForExistence();
        //定义数据
        roscpp_tutorials::TwoInts service;
        service.request.a = 12;
        service.request.b = 13;
        //调用service
        client.call(service);
        ROS_INFO_STREAM("result:"<<service.response.sum);
        //事件轮询
        ros::spin();
        return 0;
    }

cpp\_ros\_client通讯

#include <iostream>
    #include <ros/ros.h>
    #include <roscpp_tutorials/TwoInts.h>
    using namespace std;
    
    
        //service名字
        string serviceName = "cpp_service";
        //创建client
        ros::ServiceClient client = node.serviceClient<roscpp_tutorials::TwoInts>(serviceName);
        //等待server端上线
        client.waitForExistence();
        //定义数据
        roscpp_tutorials::TwoInts service;
        service.request.a = 12;
        service.request.b = 13;
        //调用service
        client.call(service);
        ROS_INFO_STREAM("result:"<<service.response.sum);
        //事件轮询
        ros::spin();

3.1

cpp\_ros\_server\_main通讯

#include <iostream>
    #include <ros/ros.h>
    #include <roscpp_tutorials/TwoInts.h>
    using namespace std;
    
    bool callBack(roscpp_tutorials::TwoIntsRequest& req,roscpp_tutorials::TwoIntsResponse& res){
        //从请求中获取两个参数
        //把和通过res返回出去
        res.sum = req.a+req.b;
        return true;
    }
    
    int main(int argc,char *argv[]){
        //节点名
        string nodeName = "cpp_server";
        //初始化节点
        ros::init(argc,argv,nodeName);
        //创建节点
        ros::NodeHandle node;
        //service名字
        string serviceName = "cpp_service";
        //创建server端
        const ros::ServiceServer &server = node.advertiseService(serviceName, callBack);
        //事件轮询
        ros::spin();
        return 0;
    }

cpp\_ros\_server通讯

#include <iostream>
    #include <ros/ros.h>
    #include <roscpp_tutorials/TwoInts.h>
    using namespace std;
    
    bool callBack(roscpp_tutorials::TwoIntsRequest& req,roscpp_tutorials::TwoIntsResponse& res){
        //从请求中获取两个参数
        //把和通过res返回出去
        res.sum = req.a+req.b;
        return true;
    }
    
    
       
        //service名字
        string serviceName = "cpp_service";
        //创建server端
        const ros::ServiceServer &server = node.advertiseService(serviceName, callBack);
        //事件轮询
        ros::spin();

**4 topic**

cpp\_ros\_publisher\_main通讯

#include <iostream>
    #include <ros/ros.h>
    #include <std_msgs/String.h>
    using namespace std;
    int main(int argc,char *argv[]){
        //节点名
        string nodeName = "cpp_publisher";
        //初始化节点 匿名节点
        ros::init(argc,argv,nodeName,ros::init_options::AnonymousName);
        //创建节点
        ros::NodeHandle node;
        //节点名
        string topicName = "cpp_topic";
        //创建topic发送者
        //参数1：节点名
        //参数2：消息队列容量
        const ros::Publisher &publisher = node.advertise<std_msgs::String>(topicName, 5);
        //每隔一秒钟发送一条消息
        ros::Rate rate(1);
        int i = 0;
        while (ros::ok()){
            std_msgs::String data;
            data.data = "hello "+to_string(i);
            //发送一条消息
            publisher.publish(data);
            //增加i
            i+=1;
            //睡眠
            rate.sleep();
        }
        return 0;
    }

cpp\_ros\_publishe通讯

#include <iostream>
    #include <ros/ros.h>
    #include <std_msgs/String.h>
    using namespace std;
    
    
    
        //节点名
        string topicName = "cpp_topic";
        //创建topic发送者
        //参数1：节点名
        //参数2：消息队列容量
        const ros::Publisher &publisher = node.advertise<std_msgs::String>(topicName, 5);
        //每隔一秒钟发送一条消息
        ros::Rate rate(1);
        int i = 0;
        while (ros::ok()){
            std_msgs::String data;
            data.data = "hello "+to_string(i);
            //发送一条消息
            publisher.publish(data);
            //增加i
            i+=1;
            //睡眠
            rate.sleep();
        }

cpp\_ros\_subscriber\_main通讯

#include <iostream>
    #include <std_msgs/String.h>
    #include <ros/ros.h>
    #include <thread>
    using namespace std;
    //c++ 订阅者的回调在主线程中
    void callBack(std_msgs::String::ConstPtr data){
        cout<<"回调:"<<this_thread::get_id()<<endl;
        cout<<"收到消息:"<<data->data<<endl;
    }
    
    int main(int argc, char *argv[]) {
        cout<<"主线程:"<<this_thread::get_id()<<endl;
        //节点名
        string nodeName = "cpp_subscriber";
    //    string nodeName = "cpp_publisher";
        //初始化节点
        ros::init(argc, argv, nodeName,ros::init_options::AnonymousName);
        //创建节点
        ros::NodeHandle node;
        //topic名字
        string topicName = "cpp_topic";
        //订阅者
        //参数1：topic名字
        //参数2：队列长度
        //参数3：回调函数
        //注意：返回的Subscriber必须要接收,如果不接受 可能收不到消息
        const ros::Subscriber &subscriber = node.subscribe<std_msgs::String>(topicName, 5, callBack);
        //ros::spin 处理事件
        ros::spin();
        return 0;
    }

cpp\_ros\_subscriber通讯

cpp\_QTimer定时器

#include <QApplication>
    #include <ros/ros.h>
    #include <QTimer>
    using namespace std;
    
        QTimer timer;
     
        MainWindow::MainWindow(){
       //定时器
        timer.setInterval(10);
        timer.start();
        //定时信号
        connect(&timer,&QTimer::timeout,this,&MainWindow::timeout);
    }
     
     
        //定时的槽函数 判断ros是否关闭,ros关闭后关闭窗口
        void MainWindow::timeout(){
          //处理消息
         if(ros::isShuttingDown()){
            QApplication::quit();
        }
       }

cpp\_getThread\_Id 获取线程ID

#include <thread>
    std::cout<<this_thread::get_id()<<endl;

**4.action标准通讯**

cpp\_ros\_action\_client\_main标准通讯

//
    // Created by wt on 2020/7/6.
    //
    #include <iostream>
    #include <ros/ros.h>
    #include <actionlib/client/action_client.h>
    #include <demo_actions/CountNumberAction.h>
    #include <thread>
     
    using namespace std;
     
    //状态改变
    void transition_cb(actionlib::ClientGoalHandle<demo_actions::CountNumberAction> goalHandle) {
     
    //    ROS_INFO_STREAM("transition cb");
        const actionlib::CommState &commState = goalHandle.getCommState();
        //等待
        if (commState == actionlib::CommState::PENDING) {
            ROS_INFO_STREAM("pending");
        } else if (commState == actionlib::CommState::ACTIVE) {//激活
            ROS_INFO_STREAM("active");
        } else if (commState == actionlib::CommState::DONE) {//结束
            const actionlib::TerminalState &state = goalHandle.getTerminalState();
            if (state == actionlib::TerminalState::REJECTED) {
                ROS_INFO_STREAM("reject");
            } else if (state == actionlib::TerminalState::PREEMPTED) {
                ROS_INFO_STREAM("preempt");
            } else if (state == actionlib::TerminalState::ABORTED) {
                ROS_INFO_STREAM("aborted "<<goalHandle.getResult()->count);
            } else if (state == actionlib::TerminalState::SUCCEEDED) {
                ROS_INFO_STREAM("succeed "<<goalHandle.getResult()->count);
            } else if (state == actionlib::TerminalState::LOST) {//服务端没有做任何处理
                ROS_INFO_STREAM("lost");
            }
        }
     
    }
     
    //进度回调
    void feedback_cb(actionlib::ClientGoalHandle<demo_actions::CountNumberAction> goalHandle,
                     const demo_actions::CountNumberFeedback::ConstPtr &feedback) {
        ROS_INFO_STREAM("feedback "<<feedback->percent);
        ROS_INFO_STREAM("feedback "<<this_thread::get_id());
    }
     
    int main(int argc, char *argv[]) {
        ROS_INFO_STREAM("main "<<this_thread::get_id());
        //节点名
        string nodeName = "action_client";
        //初始化节点
        ros::init(argc, argv, nodeName,ros::init_options::AnonymousName);
        //创建节点
        ros::NodeHandle node;
        /*-------------------------- asy --------------------------*/
        ros::AsyncSpinner spinner(1);
        spinner.start();
        /*-------------------------- action --------------------------*/
        //action名字
        string actionName = "action_gui";
        actionlib::ActionClient<demo_actions::CountNumberAction> client(node, actionName);
        //等到服务开启(阻塞线程 一直查看服务是否已经开启)
        client.waitForActionServerToStart();
        //目标
        demo_actions::CountNumberGoal goal;
        goal.max = 10;
        goal.duration = 1;
        //发送目标
        actionlib::ActionClient<demo_actions::CountNumberAction>::GoalHandle handle =
                client.sendGoal(goal,
                                transition_cb, feedback_cb);
        /*-------------------------- 取消 --------------------------*/
        ros::Rate rate(0.3);
        rate.sleep();
    //    handle.cancel();
    //    client.cancelAllGoals();
     
        //客户端不要停下来
        ros::waitForShutdown();
        return 0;
    }

cpp\_ros\_action\_server\_main标准通讯

//
    // Created by wt on 2020/7/6.
    //
    #include <iostream>
    #include <ros/ros.h>
    #include <actionlib/server/action_server.h>
    #include <demo_actions/CountNumberAction.h>
    #include <thread>
     
     
    using namespace std;
    //被取消
    bool isCancel = false;
     
    void done_cb(actionlib::ServerGoalHandle<demo_actions::CountNumberAction> goalHandle);
     
    void done_cb(actionlib::ServerGoalHandle<demo_actions::CountNumberAction> goalHandle) {//2.处理
        long max = goalHandle.getGoal()->max;
        double duration = goalHandle.getGoal()->duration;
        ros::Rate rate(duration);
     
        //结果
        demo_actions::CountNumberResult result;
        for (int i = 1; i < max; ++i) {
            /*-------------------------- 中断状态 --------------------------*/
    //        if(i==7){
    //            //中断
    //            result.count = i;
    //            goalHandle.setAborted(result);
    //            return;
    //        }
            /*-------------------------- 取消 --------------------------*/
            if(isCancel){
                result.count = i;
                goalHandle.setCanceled(result);
                return;
            }
            //进度
            demo_actions::CountNumberFeedback feedback;
            feedback.percent = (double)i/max;
            //回调进度
            goalHandle.publishFeedback(feedback);
            //睡眠
            rate.sleep();
        }
        /*-------------------------- 成功状态 --------------------------*/
        //成功
        result.count = max;
        goalHandle.setSucceeded(result);
    }
     
    //收到目标回调
    void goal_cb(actionlib::ServerGoalHandle<demo_actions::CountNumberAction> goalHandle){
        ROS_INFO_STREAM("goal cb "<<this_thread::get_id());
        ROS_INFO_STREAM("receive goal");
        //拒绝
    //    goalHandle.setRejected();
        //1.决定是否要接受任务
        goalHandle.setAccepted();
        //开启新线程
        new std::thread(done_cb,goalHandle);
    }
     
     
    //收到取消指令
    void cancel_cb(actionlib::ServerGoalHandle<demo_actions::CountNumberAction> goalHandle){
        ROS_INFO_STREAM("cancel goal");
        goalHandle.getGoalID().id;
        isCancel = true;
    }
    int main(int argc,char *argv[]){
        ROS_INFO_STREAM("thread "<<this_thread::get_id());
        //节点名
        string nodeName = "action_server";
        //初始化节点
        ros::init(argc,argv,nodeName);
        //创建节点
        ros::NodeHandle node;
        /*-------------------------- action --------------------------*/
        //action名字
        string actionName = "action_gui";
        actionlib::ActionServer<demo_actions::CountNumberAction> server(node,actionName,goal_cb,cancel_cb, false);
        //开启server
        server.start();
        //事件轮询
        ros::spin();
        return 0;
    }

cpp\_ros\_action\_client\_class标准通讯

#include <QWidget>
    #include <QLineEdit>
    #include <QPushButton>
    #include <QFormLayout>
    #include <QLabel>
    #include <actionlib/client/action_client.h>
    #include <demo_actions/CountNumberAction.h>
    
    MainWindowClient::MainWindowClient(ros::NodeHandle node, QWidget *parent) : QWidget(parent), sendBtn("发送"),
                                                                                preemptBtn("取消") {
        //设置布局
        setLayout(&layout);
        //默认值
        maxEdit.setText("10");
        durationEdit.setText("1");
        //添加控件
        layout.addRow("max:", &maxEdit);
        layout.addRow("duration:", &durationEdit);
        layout.addRow("进度:", &feedLabel);
        layout.addRow("激活状态:", &activeLabel);
        layout.addRow("完成状态:", &doneLabel);
        layout.addRow("", &sendBtn);
        layout.addRow("", &preemptBtn);
    
        //创建client
        client = new actionlib::ActionClient<demo_actions::CountNumberAction>(node, "action_gui");
        //阻塞当前线程  服务是否连接上
    //    client->waitForActionServerToStart();
        //信号和槽
        connect(&sendBtn, &QPushButton::clicked, this, &MainWindowClient::send);
        connect(&preemptBtn, &QPushButton::clicked, this, &MainWindowClient::cancel);
    }
    
    MainWindowClient::~MainWindowClient() {
    
    }
    
    void MainWindowClient::send() {
        //发送目标
        demo_actions::CountNumberGoal goal;
        goal.max = maxEdit.text().toInt();
        goal.duration = durationEdit.text().toDouble();
        //一定要保存成员变量
        handle = client->sendGoal(goal, boost::bind(&MainWindowClient::transition_cb, this, _1),
                                  boost::bind(&MainWindowClient::feedback_cb, this, _1, _2));
    }
    
    void MainWindowClient::transition_cb(actionlib::ClientGoalHandle<demo_actions::CountNumberAction> goalHandle) {
        const actionlib::CommState &comState = goalHandle.getCommState();
        if (comState == actionlib::CommState::ACTIVE) {
            activeLabel.setText("激活");
        } else if (comState == actionlib::CommState::DONE) {
            const actionlib::TerminalState &terState = goalHandle.getTerminalState();
            if (terState == actionlib::TerminalState::REJECTED) {
                doneLabel.setText("拒绝");
            } else if (terState == actionlib::TerminalState::ABORTED) {
                doneLabel.setText("中止");
            } else if (terState == actionlib::TerminalState::PREEMPTED) {
                doneLabel.setText("取消");
            } else if (terState == actionlib::TerminalState::SUCCEEDED) {
                doneLabel.setText("成功");
            }
        } else if (comState == actionlib::CommState::PENDING) {
            activeLabel.setText("等待");
        }
    }
    
    void MainWindowClient::feedback_cb(actionlib::ClientGoalHandle<demo_actions::CountNumberAction> goalHandle,
                                       const demo_actions::CountNumberFeedback::ConstPtr &feedback) {
        feedLabel.setText(QString::number(feedback->percent));
    }
    
    void MainWindowClient::cancel() {
        handle.cancel();
    }

cpp\_ros\_action\_server\_class标准通讯

#include <QWidget>
    #include <actionlib/server/action_server.h>
    #include <demo_actions/CountNumberAction.h>
    #include <thread>
    #include <QVBoxLayout>
    #include <QPushButton>
    #include <QTableView>
    #include <iostream>
    #include <QStandardItemModel>
    
    MainWindowServer::MainWindowServer(ros::NodeHandle node, QWidget *parent) : QWidget(parent), aboredAllBtn("中止") {
        //创建server
        server = new actionlib::ActionServer<demo_actions::CountNumberAction>(node, "action_gui",
                                                                              boost::bind(&MainWindowServer::goal_cb, this,
                                                                                          _1),
                                                                              boost::bind(&MainWindowServer::cancel_cb,
                                                                                          this, _1), false);
        server->start();
        /*-------------------------- 初始化ui --------------------------*/
        setLayout(&layout);
        layout.addWidget(&aboredAllBtn);
        layout.addWidget(&tableView);
        //设置model
        tableView.setModel(&model);
        //表头
        model.setHorizontalHeaderItem(0, new QStandardItem("ID"));
        model.setHorizontalHeaderItem(1, new QStandardItem("操作"));
        /*-------------------------- 绑定信号和槽 --------------------------*/
        connect(this, &MainWindowServer::updateUI, this, &MainWindowServer::updateTableView);
        connect(&aboredAllBtn,&QPushButton::clicked,[this]{
            //把所有的任务的isAborted变成true
            for (auto i = goals.begin(); i != goals.end(); ++i) {
                i->second.isAborted = true;
            }
        });
    }
    
    void MainWindowServer::done_cb(actionlib::ServerGoalHandle<demo_actions::CountNumberAction> goalHandle) {
        //获取当前任务状态,是否被取消
        string id = goalHandle.getGoalID().id;
    
        long max = goalHandle.getGoal()->max;
        double duration = goalHandle.getGoal()->duration;
        ros::Rate rate(duration);
            
        //结果
        demo_actions::CountNumberResult result;
        for (int i = 1; i < max; ++i) {
            /*-------------------------- 中断状态 --------------------------*/
            if(goals[id].isAborted){
                //中断
                result.count = i;
                goalHandle.setAborted(result);
                //删除当前任务
                goals.erase(id);
                // 再更新ui
                emit updateUI();
                return;
            }
            /*-------------------------- 取消 --------------------------*/
            if(goals[id].isCanceled){
                result.count = i;
                goalHandle.setCanceled(result);
                //删除当前任务
                goals.erase(id);
                // 再更新ui
                emit updateUI();
                return;
            }
            //进度
            demo_actions::CountNumberFeedback feedback;
            feedback.percent = (double) i / max;
            //回调进度
            goalHandle.publishFeedback(feedback);
            //睡眠
            rate.sleep();
        }
        /*-------------------------- 成功状态 --------------------------*/
        //成功
        result.count = max;
        goalHandle.setSucceeded(result);
        //删除当前任务
        goals.erase(id);
        // 再更新ui
        emit updateUI();
    }
    
    void MainWindowServer::goal_cb(actionlib::ServerGoalHandle<demo_actions::CountNumberAction> goalHandle) {
        ROS_INFO_STREAM("goal cb  " << this_thread::get_id());
        //1.决定是否要接受任务
        goalHandle.setAccepted();
        /*-------------------------- 添加到任务map中，更新界面 --------------------------*/
        Goal goal;
        string id = goalHandle.getGoalID().id;
        goal.id = id;
        //添加到map
        goals.insert({id, goal});
        //更新界面(主线程更新) 在主线程中更新
        //发送更新信号
        emit updateUI();
    //    updateTableView();
    
        //开启线程处理
        new std::thread(&MainWindowServer::done_cb, this, goalHandle);
    }
    
    //取消
    void MainWindowServer::cancel_cb(actionlib::ServerGoalHandle<demo_actions::CountNumberAction> goalHandle) {
        //获取任务id
        string id = goalHandle.getGoalID().id;
        //停下里任务,修改当前任务的isCanceled状态
        goals[id].isCanceled = true;
    }
    
    MainWindowServer::~MainWindowServer() {
    
    }
    
    //子线程更新界面就会出现问题
    void MainWindowServer::updateTableView() {
        //清理列表
        model.clear();
        //表头
        model.setHorizontalHeaderItem(0, new QStandardItem("ID"));
        model.setHorizontalHeaderItem(1, new QStandardItem("操作"));
    
        int row = 0;
        //把所有的任务展示出来
        for (auto i = goals.begin(); i != goals.end(); ++i) {
            string id = i->second.id;
            //添加一条数据
            model.setItem(row, 0, new QStandardItem(QString(id.c_str())));
            model.setItem(row, 1, new QStandardItem(""));
            //按钮
            QPushButton *btn = new QPushButton("中止");
            //中止点击事件
            connect(btn,&QPushButton::clicked,[i]{
                //修改中止状态
                i->second.isAborted = true;
            });
            //把后面的控件替换成按钮
            tableView.setIndexWidget(model.index(row, 1), btn);
            ++row;
        }
    }

**param参数:**

cpp\_ros\_param获取参数,外部传参

/*-------------------------- 设置param --------------------------*/
        node.setParam("/heihei",123);
        /*-------------------------- param --------------------------*/
        //获取所有的param
        //定义vector保存所有的param的名字
        vector<string> names;
        string value;
        int a;
        node.getParam("heihei",a);
        ROS_INFO_STREAM("HEIHEI----"<<a);
    
        //node.getParam("/turtlesim/background_b",value);
        //ROS_INFO_STREAM("turtlesim  key----------------- "<<value);
        //获取所有的param的名字
        if (node.getParamNames(names)) {
            //获取每一个key:value
            for (string ele:names) {
                ROS_INFO_STREAM("names----"<<ele);
                //前提 需要知道当前数据类型
                //定义value
                string value;
                if(node.getParam(ele,value)){
                    ROS_INFO_STREAM("key "<<ele<<"  value  "<<value);
               }
            }

launch

**信号与曹:**

cpp\_qt\_connect\_class信号和槽绑定

//信号和槽绑定
        connect(&clearBtn, &QPushButton::clicked, this, &MainWindow::clear);

**多线程:**

cpp\_thread\_class开启多线程

#include <thread>    
    //开启线程处理
        new std::thread(&MainWindowServer::done_cb, this, goalHandle);
    
    void MainWindowServer::done_cb(actionlib::ServerGoalHandle<demo_actions::CountNumberAction> goalHandle) {
        
    }

**TF坐标转换:**

cpp\_ros\_TF\_TransformBroadcaster\_main\_TF坐标转换

#include <iostream>
    #include <ros/ros.h>
    #include <turtlesim/Pose.h>
    #include <tf/transform_broadcaster.h>
    using namespace std;
    
    void callBack(const turtlesim::Pose::ConstPtr &pose,tf::TransformBroadcaster *broadcaster){
    //    ROS_INFO_STREAM("receive turtle1 pose");
        //发送的数据(位置和姿态)
        tf::Transform transform;
        //设置位置
        transform.setOrigin(tf::Vector3{pose->x,pose->y,0});
        //设置姿态 rx ry rz  rpy（欧拉角）
        //四元数 可以表示姿态 (欧拉角可以和四元数相互转换)
        //四元数
        tf::Quaternion quaternion;
        quaternion.setRPY(0,0,pose->theta);
        transform.setRotation(quaternion);
        //发送给tf
        broadcaster->sendTransform(tf::StampedTransform(transform,ros::Time().now(),"world","turtle1"));
    }
    
    int main(int argc,char *argv[]){
        //节点名
        string nodeName = "demo01_turtle1";
        //初始化节点
        ros::init(argc,argv,nodeName);
        //创建节点
        ros::NodeHandle node;
        /*-------------------------- 创建broadcast --------------------------*/
        tf::TransformBroadcaster broadcaster;
        /*-------------------------- 获取小乌龟1坐标 --------------------------*/
        ros::Subscriber subscriber = node.subscribe<turtlesim::Pose>("/turtle1/pose", 5, boost::bind(callBack,_1,&broadcaster));
    
        //事件轮询
        ros::spin();
        return 0;
    }

cpp\_ros\_TF\_TransformListener\_main\_TF坐标转换

#include <iostream>
    #include <ros/ros.h>
    #include <turtlesim/Spawn.h>
    #include <turtlesim/Pose.h>
    #include <tf/transform_broadcaster.h>
    #include <tf/transform_listener.h>
    
    using namespace std;
    
    void callBack(const turtlesim::Pose::ConstPtr &pose, tf::TransformBroadcaster *broadcaster) {
    //    ROS_INFO_STREAM("receive turtle2 pose");
        //发送的数据(位置和姿态)
        tf::Transform transform;
        //设置位置
        transform.setOrigin(tf::Vector3{pose->x, pose->y, 0});
        //设置姿态 rx ry rz  rpy（欧拉角）
        //四元数 可以表示姿态 (欧拉角可以和四元数相互转换)
        //四元数
        tf::Quaternion quaternion;
        quaternion.setRPY(0, 0, pose->theta);
        transform.setRotation(quaternion);
        //发送给tf
        broadcaster->sendTransform(tf::StampedTransform(transform, ros::Time().now(), "world", "turtle2"));
    }
    
    int main(int argc, char *argv[]) {
        //节点名
        string nodeName = "demo01_turtle2";
        //初始化节点
        ros::init(argc, argv, nodeName);
        //创建节点
        ros::NodeHandle node;
        /*-------------------------- asy --------------------------*/
        ros::AsyncSpinner spinner(1);
        spinner.start();
        /*-------------------------- 创建小乌龟 --------------------------*/
        ros::ServiceClient client = node.serviceClient<turtlesim::Spawn>("/spawn");
        //等待服务
        client.waitForExistence();
        //数据
        turtlesim::Spawn spawn;
        spawn.request.x = 3.0;
        spawn.request.y = 3.0;
        spawn.request.theta = 0.0;
        spawn.request.name = "turtle2";
        //调用服务
        client.call(spawn);
    
        /*-------------------------- 创建broadcast --------------------------*/
        tf::TransformBroadcaster broadcaster;
        /*-------------------------- 获取小乌龟2坐标 --------------------------*/
        ros::Subscriber subscriber = node.subscribe<turtlesim::Pose>("/turtle2/pose", 5,
                                                                     boost::bind(callBack, _1, &broadcaster));
    ros::Publisher publisher = node.advertise<geometry_msgs::Twist>("/turtle2/cmd_vel", 5);
        /*-------------------------- 获取小乌龟相对位置 --------------------------*/
        tf::TransformListener listener;
        while (ros::ok()){
            //接收结果
            tf::StampedTransform transform;
            try {
                //参数1：最终表达的坐标系
                //参数2：需要表示的坐标系
                //参数3：时间戳  传(0)最近时间
                //参数4：接收最终数据
                listener.lookupTransform("turtle2", "turtle1", ros::Time(0), transform);
                //获取坐标
                double x = transform.getOrigin().x();
                double y = transform.getOrigin().y();
                ROS_INFO_STREAM("x--------- "<<x<<"    y------- "<<y);
                tf::Quaternion quaternion = transform.getRotation();
                double z = quaternion.z();
                geometry_msgs::Twist twist;
                double distance = sqrt(pow(x, 2) + pow(y, 2));
                double angular = atan2(y, x);
                ///turtle1/cmd_vel 跟着乌龟１走
                twist.linear.x=distance*0.5;
                twist.angular.z=angular*3;
                publisher.publish(twist);
    
            } catch (exception e) {
    //            ROS_INFO_STREAM("exception");
            }
        }
    
        //等待程序停止
    //    ros::waitForShutdown();
        return 0;
    }

cpp\_ros\_TF\_TransformBroadcaster\_TF坐标转换

#include <iostream>
    #include <ros/ros.h>
    #include <turtlesim/Pose.h>
    #include <tf/transform_broadcaster.h>
    using namespace std;
    
        /*--------------- 创建broadcast 需要在cmakeList.txt中导入 tf库 -----------------*/
        tf::TransformBroadcaster broadcaster;
        
       //发送的数据(位置和姿态)
        tf::Transform transform;
        //设置位置 x y z 
        double x=  1.0; // 位置坐标
        double y = 5.0;
        double z = 0.0;
        transform.setOrigin(tf::Vector3{x,y,z});
        //设置姿态 rx ry rz  rpy（欧拉角）
        //四元数 可以表示姿态 (欧拉角可以和四元数相互转换)
        //四元数 z=ztheta角度
        tf::Quaternion quaternion;
        double xtheta=0.0; //角度
        double ytheta=0.0;
        double ztheta=2.0;
        quaternion.setRPY(xtheta,ytheta,ztheta);
        transform.setRotation(quaternion);
        //发送给tf  world=事件坐标 名为turtle1的坐标
     broadcaster.sendTransform(tf::StampedTransform(transform,ros::Time().now(),"world","turtle1"));

cpp\_ros\_TF\_TransformListener\_TF坐标转换

#include <iostream>
    #include <ros/ros.h>
    #include <turtlesim/Spawn.h>
    #include <turtlesim/Pose.h>
    #include <tf/transform_broadcaster.h>
    #include <tf/transform_listener.h>
    
    using namespace std;
    
        //创建节点
        ros::NodeHandle node;
        /*----------- 获取小乌龟相对位置 需要在cmakeList.txt中导入 tf库--------------------*/
       ros::Publisher publisher = node.advertise<geometry_msgs::Twist>("/turtle2/cmd_vel", 5);
        tf::TransformListener listener;
        while (ros::ok()){
            //接收结果
            tf::StampedTransform transform;
            try {
                //参数1：最终表达的坐标系
                //参数2：需要表示的坐标系
                //参数3：时间戳  传(0)最近时间
                //参数4：接收最终数据
                //获取已turtle2为坐标原点的坐标系中 turtle1的相对坐标,ros::Time(0)最近时间的坐标
                listener.lookupTransform("turtle2", "turtle1", ros::Time(0), transform);
                //获取坐标
                double x = transform.getOrigin().x();
                double y = transform.getOrigin().y();
                ROS_INFO_STREAM("x--------- "<<x<<"    y------- "<<y);
                tf::Quaternion quaternion = transform.getRotation();
                double z = quaternion.z();
                geometry_msgs::Twist twist;
                double distance = sqrt(pow(x, 2) + pow(y, 2));//勾股定理
                double angular = atan2(y, x);//取角度
                ///turtle1/cmd_vel 跟着乌龟１走
                twist.linear.x=distance*0.5;//线速度
                twist.angular.z=angular*3;//角速度
                publisher.publish(twist);
    
            } catch (exception e) {
    //            ROS_INFO_STREAM("exception");
            }
        }

cpp\_ros\_pid

// 算离坐标点的的距离[自动扫地]
    float MainWindow::distance(float curx, float cury, float dstx, float dsty) {
        return sqrt(pow(curx - dstx, 2) + pow(cury - dsty, 2));
    }
    
    
    /**
     * 计算需要转的角度 [自动扫地]
     * @param dstx
     * @param dsty
     * @param curx
     * @param cury
     * @param theta 小乌龟当前角度
     * @return
     */
    float MainWindow::caclAngle(float dstx,float dsty,float curx,float cury,float theta){
        float angle = atan2(dsty-cury,dstx-curx)-theta;
        //角度范围在0-180 -180-0
        if(angle>M_PI){
            angle -= 2*M_PI;
        } else if (angle<-M_PI){
            angle += 2*M_PI;
        }
        return angle;
    }
     /**
     * pid [自动扫地]
     * @param dstx
     * @param dsty
     * @param curx
     * @param cury
     */
       //走的距离
        float dst = distance(curx, cury, dstx, dsty);
        //走的时间
        float time = 5.0;
        //调头时间
        float turnTime = time/12;
        //频率
        float hz = 10;
        //频率
        ros::Rate rate(hz);
        //当前速度
        float curSpeed = 0;
        //记录上一次误差
        float lastError = 0;
        //总误差
        float totalError = 0;
        //kp系数
        float kp = kpEdit.text().toFloat();
        //kd系数
        float kd = kdEdit.text().toFloat();
        //ki系数
        float ki = kiEdit.text().toFloat();
     
        geometry_msgs::Twist data;
        while (distance(curx, cury, dstx, dsty) > 0.1) {
            //目标速度
            float tarSpeed = distance(curx, cury, dstx, dsty) / time;
            /*-------------------------- p --------------------------*/
            //误差
            float pError = tarSpeed - curSpeed;
            //调节速度
            curSpeed += pError * kp;
            /*-------------------------- d --------------------------*/
            float dError = pError - lastError;
            curSpeed += dError * kd;
            lastError = pError;
            /*-------------------------- i --------------------------*/
            totalError += pError;
            curSpeed+=totalError*ki;
     
            //数据
            data.linear.x = curSpeed;
            //角速度
            data.angular.z = caclAngle(dstx,dsty,curx,cury,curTheta)/turnTime;
    }

cpp\_ros\_distance\_离坐标点的的距离\_求向量

float MainWindow::distance(float curx, float cury, float dstx, float dsty) {
        return sqrt(pow(curx - dstx, 2) + pow(cury - dsty, 2));
    }

cpp\_ros\_caclAngle\_计算需要转的角度

/**
     * 计算需要转的角度 [自动扫地]
     * @param dstx
     * @param dsty
     * @param curx
     * @param cury
     * @param theta 小乌龟当前角度
     * @return
     */
    float MainWindow::caclAngle(float dstx,float dsty,float curx,float cury,float theta){
        float angle = atan2(dsty-cury,dstx-curx)-theta;
        //角度范围在0-180 -180-0
        if(angle>M_PI){
            angle -= 2*M_PI;
        } else if (angle<-M_PI){
            angle += 2*M_PI;
        }
        return angle;
    }

cpp\_ros\_Gripper\_因时电动夹爪

#include "Gripper.h"
    // 需要在CMakeLists.txt中导入 rs232.cpp的库   add_executable(jaw main.cpp rs232.cpp Gripper.cpp)
    Gripper::Gripper(char *port,int btl):rs232(port,btl) {
    
    }
    
    Gripper::~Gripper() {
    
    }
    
    void Gripper::catchJaw(int speed, int power) {
        unsigned char data[10];
        data[0] = 0xEB;
        data[1] = 0x90;
        data[2] = 0x01;
        data[3] = 0x05;
        data[4] = 0x10;
        data[5] = speed&0x00ff;
        data[6] = speed>>8;
        data[7] = power&0x00ff;
        data[8] = power>>8;
        data[9] = data[2]+data[3]+data[4]+data[5]+data[6]+data[7]+data[8];
        rs232.Write(data,sizeof(data)/sizeof(unsigned char));
    }
    
    void Gripper::release(int speed) {
        unsigned char data[8];
        data[0] = 0xEB;
        data[1] = 0x90;
        data[2] = 0x01;
        data[3] = 0x03;
        data[4] = 0x11;
        data[5] = speed&0x00ff;
        data[6] = speed>>8;
        data[7] = data[2]+data[3]+data[4]+data[5]+data[6];
        rs232.Write(data,sizeof(data)/sizeof(unsigned char));
    }

urdf模拟仿真制作文件

urdf

<?xml version="1.0" encoding="UTF-8" ?>
    <robot name="box">
         
       
        <material name="c1">
            <color rgba="0.8 0.4 0 0.8"/>
        </material>
    
        <material name="c2">
            <color rgba="0 0 1 0.8"/>
        </material>
    
        
        <link name="base">
            <visual>
                <geometry>
                    <box size="0.2 0.2 0.6"/>
                </geometry>
                <material name="c1"/>
            </visual>
        </link>
    
        
        <link name="link2">
            <visual>
                <origin xyz="0 0 0.5"/>
                <geometry>
                    <box size="0.3 0.3 1"/>
                </geometry>
                <material name="c2"/>
            </visual>
        </link>
        
        <joint name="joint1" type="fixed">
            <origin xyz="0 0 0.3" rpy="0 0 0"/>
            <parent link="base"/>
            <child link="link2"/>
        </joint>
    
        
        <joint name="joint1" type="revolute">
            <origin xyz="0 0 0.3" rpy="0 0 0"/>
            <parent link="base"/>
            <child link="link2"/>
            
            <axis xyz="0 1 0"/>
            
    
            <limit effort="30" velocity="1.0" lower="-3.1415926" upper="3.1415926" />
        </joint>
    
       
        <joint name="joint1" type="continuous">
            <origin xyz="0 0 0.3" rpy="0 0 0"/>
            <parent link="base"/>
            <child link="link2"/>
    
            <axis xyz="0 1 0"/>
    
        
        </joint>
             
            <joint name="joint1" type="prismatic">
            <origin xyz="0 0 0.3" rpy="0 0 0"/>
            <parent link="base"/>
            <child link="link2"/>
    
            <axis xyz="0 0 1"/>
           
            <limit effort="30" velocity="1.0" lower="-1.5" upper="1.5" />
        </joint>
    </robot>

xacro模拟仿真制作文件

xacro

<?xml version="1.0" encoding="UTF-8" ?>
    <robot xmlns:xacro="http://www.ros.org/wiki/xacro" name="box">
    
      
        
        
        <xacro:macro name="MyColor" params="name">
            <material name="${name}">
                <xacro:if value="${name=='red'}">
                    <color rgba="1.0 0 0 1.0"/>
                </xacro:if>
                <xacro:if value="${name=='green'}">
                    <color rgba="0 1.0 0 1.0"/>
                </xacro:if>
                <xacro:if value="${name=='blue'}">
                    <color rgba="0 0 1.0 1.0"/>
                </xacro:if>
                <xacro:if value="${name=='white'}">
                    <color rgba="1.0 1.0 1.0 1.0"/>
                </xacro:if>
            </material>
    
        </xacro:macro>
    
        
                    
                    <box size="1 2 3"/>
                    
                    
                    
                    
                    
                    
                    
    
         
    
            
         <xacro:macro name="mylink" params="name size colorname xyz:='0 0 0'">
            <link name="${name}">
                <visual>
                    
                 
               
                    <origin xyz="${xyz}" />
                    <geometry>
                        
                        <box size="${size}"/>
                    </geometry>
                  <xacro:MyColor name="${colorname }"/>
                </visual>
            </link>
        </xacro:macro>
    
        <xacro:mylink name="base" size="0.2 0.2 0.6" color="red"/>
    
        <xacro:mylink name="link2" size="0.3 0.3 1" xyz="0 0 0.5" color="blue"/>
    
        
        
        
        
        <joint name="joint1" type="revolute">
            <origin xyz="0 0 0.3" rpy="0 0 0"/>
            <parent link="base"/>
            <child link="link2"/>
    
            
            <axis xyz="0 1 0"/>
    
            
            <limit effort="30" velocity="1.0" lower="-3.1415926" upper="3.1415926" />
        </joint>
    
    </robot>

**urdf与xacro模拟仿真启动配置launch文件**

launch\_ros\_urdf\_xacro模拟仿真启动配置

启动: roslaunch demo\_tf config.launch mode:=geometry\_box.urdf 后面参数自己改,不传的话默认geometry\_box.urdf

cpp\_ros\_ur3\_aubo5\_移动

#include <moveit/move_group_interface/move_group_interface.h>
    #include <geometry_msgs/Pose.h>
    
    moveit::planning_interface::MoveGroupInterface group("manipulator_i5");//aubo5
    //moveit::planning_interface::MoveGroupInterface group("manipulator");//ur3
        //设置目标
    //    group.setNamedTarget("home");
        // 设置随机位置
    //    group.setRandomTarget();
    
        //去到具体的位置
        geometry_msgs::Pose pose;
        // 位置
        pose.position.x = 0.3;
        pose.position.y = 0.4;
        pose.position.z = 0.2;
        // 姿态(四元素)(欧拉角转四元素)
        tf::Quaternion quat;
        quat.setRPY(deg2rad(0), deg2rad(90), deg2rad(90));
        pose.orientation.x = quat.x();
        pose.orientation.y = quat.y();
        pose.orientation.z = quat.z();
        pose.orientation.w = quat.w();
    
        group.setPoseTarget(pose);
    
        //移动
        group.move();

cpp\_\_ros\_ur3\_aubo5\_轨迹规划

#include <moveit/move_group_interface/move_group_interface.h>
    #include <geometry_msgs/Pose.h>
    
    #include <tf/LinearMath/Quaternion.h>
    #include "moveit_visual_tools/moveit_visual_tools.h"
    
    moveit::planning_interface::MoveGroupInterface group("manipulator_i5");//aubo5
    //moveit::planning_interface::MoveGroupInterface group("manipulator");//ur3
    
     moveit::planning_interface::MoveGroupInterface::Plan plan;
        const moveit::planning_interface::MoveItErrorCode &code = group.plan(plan);
        if (code == moveit::planning_interface::MoveItErrorCode::SUCCESS) {
            // 成功
            ROS_INFO_STREAM("计划成功: Success");
    
            string frame = group.getPlanningFrame();
            moveit_visual_tools::MoveItVisualTools tools(frame);
    
            const moveit::core::JointModelGroup *jointModelGroup = group.getCurrentState()->getJointModelGroup("manipulator");
            tools.publishTrajectoryLine(plan.trajectory_, jointModelGroup);
    
            tools.trigger();
    
            group.move();
        } else {
            // 失败
            ROS_INFO_STREAM("计划失败: Failed");
        }

cpp\_\_ros\_ur3\_aubo5\_断点调试\_tools\_promp

cpp\_\_ros\_ur3\_aubo5\_障碍物环境

//moveit环境引入
    #include <moveit/move_group_interface/move_group_interface.h>
    #include <geometry_msgs/Pose.h>
    
    #include <tf/LinearMath/Quaternion.h>
    #include <moveit/planning_scene_interface/planning_scene_interface.h>
    
     moveit::planning_interface::MoveGroupInterface group("manipulator_i5");
    //moveit::planning_interface::MoveGroupInterface group("manipulator");//ur3
        //场景管理器
        moveit::planning_interface::PlanningSceneInterface scene;
    
        //障碍物集合
        std::vector<moveit_msgs::CollisionObject> objects;
    
        //单个障碍物
        moveit_msgs::CollisionObject obj;
        //操作类型
        obj.operation = obj.ADD;
        obj.id = "box";
        obj.header.frame_id = group.getPlanningFrame();//坐标系
        //形状
        shape_msgs::SolidPrimitive shape;
        shape.type = shape.BOX;//盒子形状
        shape.dimensions.push_back(1);
        shape.dimensions.push_back(2);
        shape.dimensions.push_back(3);
        obj.primitives.push_back(shape);
        //位置和姿态
        geometry_msgs::Pose pose;
        pose.position.x = 0.1;
        pose.position.y = 0.2;
        pose.position.z = 0.3;
        // 姿态(四元素)(欧拉角转四元素)
        tf::Quaternion quat;
        quat.setRPY(deg2rad(0), deg2rad(0), deg2rad(0));
        pose.orientation.x = quat.x();
        pose.orientation.y = quat.y();
        pose.orientation.z = quat.z();
        pose.orientation.w = quat.w();
        obj.primitive_poses.push_back(pose);
    
        objects.push_back(obj);
    
        std::vector<moveit_msgs::ObjectColor> colors;
        moveit_msgs::ObjectColor color;
        color.id = "box";
        // [0,255] int, float32 [0, 1]
        color.color.r = 255 / 255.0;
        color.color.g = 0;
        color.color.b = 0;
        color.color.a = 1;
        colors.push_back(color);
    
        //在场景中添加障碍物
    //    scene.addCollisionObjects(objects);
        scene.applyCollisionObjects(objects, colors);

cpp\_\_ros\_ur3\_aubo5\_位置和姿态欧拉角转四元素

#include <tf/LinearMath/Quaternion.h>
    
    double deg2rad(double deg) {
        return deg * M_PI / 180.0;
    }
    
        //位置和姿态
        geometry_msgs::Pose pose;
        pose.position.x = 0.1;
        pose.position.y = 0.2;
        pose.position.z = 0.3;
        // 姿态(四元素)(欧拉角转四元素)
        tf::Quaternion quat;
        quat.setRPY(deg2rad(0), deg2rad(0), deg2rad(0));
        pose.orientation.x = quat.x();
        pose.orientation.y = quat.y();
        pose.orientation.z = quat.z();
        pose.orientation.w = quat.w();
        obj.primitive_poses.push_back(pose);

**  opencv**

estimateRigidTransform()：计算多个二维点对或者图像之间的最优仿射变换矩阵 （2行x3列），H可以是部分自由度，比如各向一致的切变。
    
    getAffineTransform()：计算3个二维点对之间的仿射变换矩阵H（2行x3列），自由度为6.
    
    warpAffine()：对输入图像进行仿射变换
    
    findHomography： 计算多个二维点对之间的最优单映射变换矩阵 H（3行x3列） ，使用最小均方误差或者RANSAC方法 。
    
    getPerspectiveTransform()：计算4个二维点对之间的透射变换矩阵 H（3行x3列）
    
    warpPerspective()： 对输入图像进行透射变换
    
    perspectiveTransform()：对二维或者三维矢量进行透射变换，也就是对输入二维坐标点或者三维坐标点进行投射变换。
    
    estimateAffine3D：计算多个三维点对之间的最优三维仿射变换矩阵H （3行x4列）
    
    transform()：对输入的N维矢量进行变换，可用于进行仿射变换、图像色彩变换.
    
    findFundamentalMat：计算多个点对之间的基矩阵H。

cpp\_opencv\_convertTo数据类型转换  --------------------------

Mat data = src.reshape(src.channels(),src.rows*src.cols);
    data.convertTo(data,CV_32FC3);

cpp\_opencv\_zeros创建空白的图片

// 创建一张空白的图片
        // CV_8UC3 ----> CV_32FC3
        //Mat data = Mat::zeros(src.rows*src.cols,1,CV_32FC3);  
    	// 创建一张空白的图片， 用于接收kmeans聚类结果
        //Mat distImg(src.size(),src.type());
        //Mat labelimg = Mat::zeros(src.size(),CV_8UC3);

cpp\_opencv\_reshape数据打扁

// 数据打扁
        Mat data = src.reshape(src.channels(),src.rows*src.cols);
        //data.convertTo(data,CV_32FC3);//看情况是否需要转换类型 CV_8UC3 ----> CV_32FC3
    
    
        /* 方式2
        Mat src =  imread("../img/zhengjianzhao0.jpg");
        cout<<"src.size(): "<<src.size()<<endl;
        Mat data = Mat::zeros(src.rows*src.cols,1,CV_32FC3);
        //填充数据
        for (int i = 0; i < src.rows; ++i) {
            for (int j = 0; j < src.cols; ++j) {
                Vec3b color = src.at<Vec3b>(i,j);
                int index=i*src.cols+j;
                data.at<Vec3f>(index)=color;
            }
        }
        */

cpp\_opencv\_RNG随机数

RNG rng(12345678);
        Vec3b colors[]={
            Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
            Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
            Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
            Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
            Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
        };

cpp\_opencv\_kmeans替换背景

#include <opencv2/opencv.hpp>
    #include <iostream>
    
    using namespace cv;
    using namespace std;
    /**
     *
     * 替换背景
     */
    int main(){
        Mat src = imread("../img/zhengjianzhao0.jpg");
        imshow("src0",src);
    	
    	// 创建一张空白的图片
        // CV_8UC3 ----> CV_32FC3
        //Mat data = Mat::zeros(src.rows*src.cols,1,CV_32FC3);  
        // 将数据打扁 写法1
        /*for (int row = 0; row < src.rows; ++row) {
            for (int col = 0; col < src.cols; ++col) {
                // 获取每一个像素点的颜色
                Vec3b color = src.at<Vec3b>(row,col);
                // 将数据封装到Data中
                int index = row*src.cols +;
                data.at<Vec3f>(index) = color;
            }
        }*/
    	
    	// 将数据打扁 写法2
        Mat data = src.reshape(src.channels(),src.rows*src.cols);
    	// CV_8UC3 ----> CV_32FC3
        data.convertTo(data,CV_32FC3);
    
        int k = 4; // 分几类
        Mat labels; // 输出的结果 对数据打标签
        // 终止条件TermCriteria   参数1:类型 COUNT根据次数来停止, EPS根据预值来停止,COUNT +EPS 次数+预值;  
    	//参数2:最大次数  参数3:预值   (停止的方式可以是最大次数,可以是预值,具体看参数1)
        TermCriteria termCriteria(TermCriteria::COUNT + TermCriteria::EPS,10,0.1);
        Mat centers;
    	// K-means算法; 参数1:data: 输入的数据 参数2:k :分几类  参数3:labels:输出的结果,对数据打标签  参数4:termCriteria:终止条件
    	//参数4:执行几次kmeans算法  参数5: 选择中心点 参数6:center中心有一个输出
        kmeans(data,k,labels,termCriteria,3,KMEANS_RANDOM_CENTERS,centers);
    
        // ---------start-----------  根据labels绘制图像 预显示 分类颜色填充的图片
        Mat labelimg = Mat::zeros(src.size(),CV_8UC3);
    
        RNG rng(12345678);
        Vec3b colors[]={
            Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
            Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
            Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
            Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
            Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
        };
        for (int row = 0; row < labelimg.rows; ++row) {
            for (int col = 0; col < labelimg.cols; ++col) {
                int index = row*labelimg.cols + col;
                // 获取当前位置对应的标签
                int label = labels.at<int>(index);
                // 根据label绘制不同的颜色
                labelimg.at<Vec3b>(row,col) = colors[label];
            }
        }
    	// ---------end-----------  预显示 分类颜色填充的图片
        imshow("labelimg",labelimg);
    
        // 获取当前的背景
        Vec3b backgroundColor = labelimg.at<Vec3b>(0,0);
        // 获取背景对应的标签
        int backgroundlabel = labels.at<int>(0);
    
    
        // 修改原图
        for (int row = 0; row < src.rows; ++row) {
            for (int col = 0; col < src.cols; ++col) {
                // 根据当前位置标签来修改背景颜色
                int currentLabel = labels.at<int>(row*src.cols+col);
                // 判断当前的label是否等于backgroundLabel
                if(currentLabel == backgroundlabel){
                    src.at<Vec3b>(row,col) = Vec3b(255,255,0);
                }
            }
        }
    
    
        imshow("src",src);
        waitKey();
        return 0;
    }

cpp\_opencv\_distanceTransform距离变换

#include <opencv2/opencv.hpp>
    #include <iostream>
    
    using namespace cv;
    using namespace std;
    /**
     *
     * @return
     */
     /*
     计算距离的方法
    DIST_USER	User defined distance.
    DIST_L1	distance = |x1-x2| + |y1-y2|
    DIST_L2	the simple euclidean distance
    DIST_C	distance = max(|x1-x2|,|y1-y2|)
    DIST_L12	L1-L2 metric: distance = 2(sqrt(1+x*x/2) - 1))
    DIST_FAIR	distance = c^2(|x|/c-log(1+|x|/c)), c = 1.3998
    DIST_WELSCH	distance = c^2/2(1-exp(-(x/c)^2)), c = 2.9846
    DIST_HUBER	distance = |x|<c ? x^2/2 : c(|x|-c/2), c=1.345
    */
    int main(){
        Mat src = imread("../img/shape.jpg");
    
        // 彩图 --》 灰度图
        Mat gray;
        cvtColor(src,gray,COLOR_BGR2GRAY);
    
        Mat binary;
        threshold(gray,binary,0,255,THRESH_BINARY_INV|THRESH_TRIANGLE);
        imshow("binary",binary);
    
        Mat distanceResult;
    	//参数1: 输入图像  参数2: 输出图像 参数3: 计算距离的方法  参数4: 掩膜的大小，一般为3x3 或者 5x5 ;  参数5:   dstType = CV_32F 选用默认值即可
        distanceTransform(binary,distanceResult,DIST_L2,3);
    
        // 将数据进行归一化 0,~1
        Mat normalResult;
        normalize(distanceResult,normalResult,0,1.0,NORM_MINMAX);
        cout<<normalResult<<endl;
        // 0 ~1.0 自动显示   0-255
        imshow("distance",normalResult);
    
        imshow("src",src);
        waitKey();
        return 0;
    }

cpp\_opencv\_resize缩放

Mat src = imread("../img/02_qiebian.jpg",IMREAD_COLOR);
        Mat mat1;
        resize(src,mat1,Size(src.cols/2,src.rows/2));
        imshow("mat1",mat1);

cpp\_opencv\_warpAffine仿射\_旋转

Mat src = imread("../img/02_qiebian.jpg",IMREAD_COLOR);
        Point2f center(src.cols/2,src.rows/2);
        // 定义仿射矩阵： 参数1：中心点， 参数2：旋转角度 90度，参数3：缩放系数
        Mat matrix =getRotationMatrix2D(Point2f(src.cols/2,src.rows/2),90,1);
        Mat out;
        //1.原始图像,2.变换矩阵,3.(高度,宽度)
        warpAffine(src,out,matrix,src.size());
        imshow("out",out);

cpp\_opencv\_warpAffine仿射\_平移

Mat src = imread("../img/02_qiebian.jpg",IMREAD_COLOR);
        # 定义位移变换矩阵 
        Mat matrixShif =(Mat_<double>(2,3)<<1,0,100,0,1,100);
        cout<<"matrixShif   = "<<matrixShif<<endl;
        /*matrixShif  =
           [1, 0, 100;
           0, 1, 100]   */
        Mat dst;
        //1.原始图像,2.变换矩阵,3.(高度,宽度)
        warpAffine(src,dst,matrixShif,src.size());
        imshow("dst",dst);

cpp\_opencv\_Mat\_matrix自定义卷积核矩阵

# 定义变换矩阵
     // 定义卷积核
    // Mat kernel = (Mat_<char>(3,3)<<-1,-1,-1,-1,9,-1,-1,-1,-1); 
    Mat matrixShift  =(Mat_<double>(2,3)<<1,0,100,0,1,100);
        cout<<"m  = "<<endl<<m<<endl<<endl;
        /*m  =
       [1, 0, 100;
       0, 1, 100]*/

cpp\_opencv\_erode腐蚀

// 腐蚀去噪点 
        Mat erodesrc; //返回图形
        //MORPH_RECT 矩形, MORPH_ELLIPSE 椭圆形, MORPH_CROSS	十字型
        Mat kernel = getStructuringElement(MORPH_RECT,Size(5,5));
        erode(thresrc,erodesrc,kernel);
        imshow("erodesrc",erodesrc);

cpp\_opencv\_dilate\_膨胀

// 膨胀去噪点 
        Mat erodesrc; //返回图形
        //MORPH_RECT 矩形, MORPH_ELLIPSE 椭圆形, MORPH_CROSS	十字型
        Mat kernel = getStructuringElement(MORPH_RECT,Size(5,5));
        dilate(thresrc,erodesrc,kernel);
        imshow("erodesrc",erodesrc);

cpp\_opencv\_morphologyEx\_开操作

// 开操作
        Mat dst;
        Mat kernel = getStructuringElement(MORPH_RECT,Size(5,5));
        morphologyEx(src,dst,MORPH_OPEN,kernel);

cpp\_opencv\_morphologyEx\_闭操作

// 闭操作
        Mat dst;
        Mat kernel = getStructuringElement(MORPH_RECT,Size(5,5));
        morphologyEx(src,dst,MORPH_CLOSE,kernel);

cpp\_opencv\_HoughLinesP霍夫直线

// 霍夫直线
        vector<Vec4i> lines;
        //参数１：图　参数２：返回的线段点　参数３：线段以像素为单位的距离精度，double类型的，推荐用1.0　参数３：// 线段以弧度为单位的角度精度，推荐用CV_PI/180　
        // 参数５：累加平面的阈值参数，int类型，超过设定阈值才被检测出线段，值越大，基本上意味着检出的线段越长，检出的线段个数越少。
        HoughLinesP(dilateSrc,lines,1,CV_PI/180,30,20,10);
        for (int i = 0; i < lines.size(); ++i) {
            Vec4i li =  lines[i];
            int x1=li[0];
            int y1=li[1];
            int x2=li[2];
            int y2=li[3];
            cout<<x1<<endl;
            //绘制线段
            line(src,Point(x1,y1),Point(x2,y2),Scalar(255,0,0),2);
        }

cpp\_opencv\_line绘制线段

Mat src = imread("../img/engline.jpg",IMREAD_COLOR);
    //绘制线段
    line(src,Point(x1,y1),Point(x2,y2),Scalar(255,0,0),2);

cpp\_opencv\_HoughCircles霍夫圆

/*
        参数1: grayImg 8-bit 单通道图片
        参数2: circles Vec3f 返回圆的参数
        参数3: method 检测方法, 当前只有HOUGH_GRADIENT
        参数4: dp 累加器分辨率和图像分辨率的反比例, 例如:
            如果 dp=1 累加器和输入图像分辨率相同. 
            如果 dp=2 累加器宽高各为输入图像宽高的一半相同. 
        参数5: minDist 检测到圆的圆心之间的最小距离。
            如果参数太小，除了真实的一个之外，可能错误地检测到多个相邻的圆圈。
            如果参数太大，可能会遗漏一些圆
        参数6:  100
            它是两个传递给Canny边缘检测器的较高阈值（较低的阈值是此值的一半）
        参数7:, 它是检测阶段圆心的累加器阈值。
            它越小，会检测到更多的假圆圈。较大累加器值对应的圆圈将首先返回。
        参数8: minRadius 最小圆半径.
        参数9: maxRadius 最大圆半径. 
            如果<=0, 会使用图片最大像素值
            如果< 0, 直接返回圆心, 不计算半径
        */
    
        vector<Vec3f> circles;
        HoughCircles(grayImg, circles, HOUGH_GRADIENT, 1, 10, 100, 30, 5, 30);
    
    
        for (int i = 0; i < circles.size(); ++i) {
            Vec3f c = circles.at(i);
            Point center(c[0], c[1]);
            float radius = c[2];
            cout << radius << endl;
           //画圆 参数1:图 参数2:中心点 参数3:半径 参数4:颜色 参数5:线条宽度 参数6:抗锯齿
            circle(frame, center, radius, Scalar(0, 255, 0), 2, LINE_AA);
        }
    
    
        imshow("rest", frame);

cpp\_opencv\_circle画圆

for (int i = 0; i < circles.size(); ++i) {
            Vec3f c = circles.at(i);
            Point center(c[0], c[1]);
            float radius = c[2];
            cout << radius << endl;
           //画圆 参数1:图 参数2:中心点 参数3:半径 参数4:颜色 参数5:线条宽度 参数6:抗锯齿
            circle(frame, center, radius, Scalar(0, 255, 0), 2, LINE_AA);
        }

cpp\_opencv\_findContours查找轮廓

std::vector<std::vector<cv::Point> > Contours;
        findContours(thresOutsrc,Contours,cv::RetrievalModes::RETR_EXTERNAL,cv::ContourApproximationModes::CHAIN_APPROX_SIMPLE);
        double maxarea=0;
        int y=0;
        cout<<"Contours.size()"<<Contours.size()<<endl;
        for (int i = 0; i < Contours.size(); ++i) {
            double area = contourArea(Contours[i]);
            if(area>maxarea){
                maxarea=area;
                y=i;
            }
        }
        Rect rect = boundingRect(Contours[y]);
        //drawContours(src,Contours,y,Scalar(255,255,0),1);
        Mat m=src(rect);

cpp\_opencv\_warpPerspective透视变换

/**
     图片的透视变换
    
     # 左上角
    pt1 = (120,90)
    # 右上角
    pt2 = (350,90)
    
    # 左下角
    pt3 = (60,470)
    # 右下角
    pt4 = (430,470)
     */
    #include <iostream>
    #include <opencv2/opencv.hpp>
    
    using namespace std;
    using namespace cv;
    
    int main(int argc,char** argv){
        string path = "/home/kaijun/Pictures/zhengjianzhao.png";
    
        Mat src = imread(path,IMREAD_COLOR);
    
        imshow("src",src);
    
        vector<Point2f> sourcePoint={Point2f(120,90),Point2f(350,90),Point2f(60,470),Point2f(430,470)};
    
        // 处理完成之后，将图像映射到新的空间中去
        vector<Point2f> dstPoint = {Point2f(0,0),Point2f(480,0),Point2f(0,600),Point2f(480,600)};
    
        // 计算透视变换的转换矩阵
        Mat matrix = getPerspectiveTransform(sourcePoint,dstPoint);
    
        // 调用转换函数
        Mat dst;
        warpPerspective(src,dst,matrix,Size(480,600));
    
        imshow("dst",dst);
    
        waitKey(0);
        return 0;
    }

cpp\_opencv\_equalizeHist直方图均衡化

Mat src = imread("../img/itheima.jpg");
        vector<Mat> srcChannels;
        // 切割 ， 将BGR 拆成 单个通道
        split(src,srcChannels);
    
        Mat channel0;
        Mat channel1;
        Mat channel2;
    
        equalizeHist(srcChannels[0],channel0);
        equalizeHist(srcChannels[1],channel1);
        equalizeHist(srcChannels[2],channel2);
    
        vector<Mat> resChannels = {channel0,channel1,channel2};
        Mat dst;
        // 合并BGR
        merge(resChannels,dst);
    
    
        imshow("src",src);
        imshow("dst",dst);

cpp\_opencv\_matchTemplate模板匹配

// 读取原图
        Mat src = imread("../assets/zhaonimei.jpg",IMREAD_COLOR);
        imshow("src",src);
    
        // 模板
        Mat temp = imread("../assets/mei.jpg",IMREAD_COLOR);
        imshow("teamplate",temp);
        // 调用api查找内容
        int width = src.cols - temp.cols;
        int height = src.rows - temp.rows;
        Mat result(height,width,CV_8UC1);
        matchTemplate(src,temp,result,TM_SQDIFF);
    
        // 将结果进行归一化处理  , 可做可不做
        normalize(result,result,0,1,NORM_MINMAX);
    
        Point minLoc,maxLoc;
        double min,max;
        // 求最大值最小值
        minMaxLoc(result,&min,&max,&minLoc,&maxLoc);
    
        printf("min:%f ,max:%f..\n",min,max);
        //画矩形
        rectangle(src,Rect(minLoc.x,minLoc.y,temp.cols,temp.rows),Scalar(0,0,255),2,LINE_AA);
    
    
        imshow("dst",src);

cpp\_opencv\_rectangle画矩形

//画矩形
        rectangle(src,Rect(minLoc.x,minLoc.y,temp.cols,temp.rows),Scalar(0,0,255),2,LINE_AA);

cpp\_opencv\_filter2D图像的卷积

#include <iostream>
    #include <opencv2/opencv.hpp>
    
    using namespace std;
    using namespace cv;
    
    int main(){
        Mat img = imread("../assets/lena.jpg",IMREAD_COLOR);
        imshow("src",img);
    
        // 定义卷积核
        Mat kernel = (Mat_<char>(3,3)<<-1,-1,-1,
                                            -1,9,-1,
                                            -1,-1,-1);
    
        // 进行图像的卷积操作
        Mat dst;
        filter2D(img,dst,-1,kernel);
    
        imshow("dst",dst);
    
        waitKey(0);
        destroyAllWindows();
        return 0;
    }

cpp\_opencv\_GaussianBlur高斯模糊

Mat gray; //返回值
        cvtColor(src_img,gray,COLOR_BGR2GRAY);
        // 高斯模糊   参数1:图像  参数3:卷积核大小, 参数4:标准差越大，去除高斯噪声能力越强，图像越模糊
        GaussianBlur(gray,gray,Size(3,3),0);

cpp\_opencv\_Scharr算子

Scharr(gray,xgray,CV_16S,1,0);

cpp\_opencv\_findContours轮廓提取\_比较全

#include <iostream>
    #include <opencv2/opencv.hpp>
    #include <stdio.h>
    
    using namespace std;
    using namespace cv;
    
    
    Mat img;
    
    void changeThresh(int val,void* userdata){
        // 1. 定义结果矩阵
        Mat cannyImg;
    
        // 使用Canny算法获取图像的边缘信息
        Canny(img,cannyImg,50,val);
    
        // 调用api从canny图像上查找轮廓
        vector<vector<Point>> contours;
        vector<Vec4i> hierachy;
    
        findContours(cannyImg,contours,hierachy,RETR_EXTERNAL,CHAIN_APPROX_NONE);
    
        Mat dst = Mat::zeros(img.size(), img.type());
        drawContours(dst,contours,-1,Scalar(255,255,0),2,LINE_AA);
    
    
        // 绘制轮廓
        for(int i=0;i<contours.size();i++){
           vector<Point> c = contours[i];
           // 计算面积
           double area = contourArea(c);
           cout<<"面积为："<<area<<endl;
           // 计算弧长
           double arc = arcLength(c,true);
           cout<<"弧长为："<<endl;
    
           // 计算外切圆
           Point2f center;
           float radius;
           minEnclosingCircle(c,center,radius);
           cout<<"圆心坐标："<<center<<"  半径："<<radius;
    
           circle(dst,center,radius,Scalar(0,0,255),2,LINE_AA);
        }
    
        imshow("dst",dst);
        int i = *static_cast<int *>(userdata);
        cout<<val<<"======"<<(i)<<endl;
    
    }
    
    int main(){
        img = imread("../assets/shape.jpg", IMREAD_COLOR);
    
        imshow("src",img);
    
        int thresh=104;
        int userdata=100;
    
        cout<<userdata<<"=="<<&userdata<<endl;
        namedWindow("dst");
        createTrackbar("thresh","dst",&thresh,255,changeThresh,&userdata);
        changeThresh(104,&userdata);
    //    imshow("dst",img);
    
    
        waitKey(0);
        destroyAllWindows();
        return 0;
    }

cpp\_opencv\_floodFill泛洪填充/漫水填充

/*
    int cv::floodFill   (   
        InputOutputArray    image, 输入图像
        Point   seedPoint,         种子点位置
        Scalar  newVal,            填充颜色值  
        Rect *  rect = 0,          输出填充区域的boundingbox
        Scalar  loDiff = Scalar(), 颜色的最小差异
        Scalar  upDiff = Scalar(), 颜色的最大差异
        int     flags = FLOODFILL_FIXED_RANGE  常用的是按照颜色差异范围来填充 
    )  
    */ 
    
    #include <iostream>
    #include <opencv2/opencv.hpp>
    using namespace std;
    using namespace cv;
    
    
    Mat src;
    RNG rng(123456);
    
    void onMouse(int event, int x, int y, int flags, void* userdata){
        // 如果鼠标左键被按下，就在这里打个点开始填充
        if(event == CV_EVENT_LBUTTONDOWN){
            // 构建一个随机的颜色
            Scalar randomColor = Scalar(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255));
    
            Rect rect;
            //       输入图  种子点            填充颜色      输出填充大小           最小差异                        最大差异                            按照范围填充
            floodFill(src,Point(x,y),randomColor,&rect,Scalar(20,20,20),Scalar(100,100,100),FLOODFILL_FIXED_RANGE);
    
            cout<<rect.size()<<endl;
    
            imshow("src",src);
        }
    }
    
    int main(int argc,char** argv){
        string path = "/home/kaijun/Documents/resource/opencv/zp.jpg";
        // 读取图片
        src = imread(path,IMREAD_COLOR);
    
        // 定义窗口
        namedWindow("src",WINDOW_NORMAL);
        setMouseCallback("src",onMouse);
        imshow("src",src);
    
        waitKey(0);
        return 0;
    }

cpp\_opencv\_watershed图像分水岭

//
    // Created by itcast on 7/22/20.
    //
    
    #include <opencv2/opencv.hpp>
    #include <iostream>
    
    using namespace cv;
    using namespace std;
    /**
     * 图像分水岭
     */
    Mat src = imread("../img/wan.png");
    Mat markers = Mat::zeros(src.rows,src.cols,CV_32SC1);
    // 只是为了显示markers的标记
    Mat img = Mat::zeros(src.rows,src.cols,CV_8UC1);
    int n = 1;
    RNG rng(123451325);
    void onMouse(int event, int x, int y, int flags, void* userdata){
    
        // 如果用户按下左键 就给makers打标记
        if(event == EVENT_LBUTTONDOWN){
            // 打的是标记
            circle(markers,Point(x,y),50,Scalar(n++),-1);
    
            // 显示颜色
            circle(img,Point(x,y),50,Scalar(255),-1);
            imshow("img",img);
        }else if(event == EVENT_RBUTTONDOWN){
            // 执行分水岭算法
            watershed(src,markers);
            cout<<"markers:"<<markers<<endl;
    
            vector<Vec3b> colors = {
                    Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
                    Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
                    Vec3b(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)),
            };
    
            // 展现最终分割结果
            Mat dst = Mat::zeros(src.rows,src.cols,CV_8UC3);
            for (int row = 0; row < markers.rows; ++row) {
                for (int col = 0; col < markers.cols; ++col) {
                    int label = markers.at<int>(row,col);
    
                    if(label>0 && label < n){
                        dst.at<Vec3b>(row,col) = colors[label];
                    }else{
                        dst.at<Vec3b>(row,col) = Vec3b(0,0,255);
                    }
                }
            }
            imshow("dst",dst);
    
        }
    }
    
    int main(){
    
        imshow("src",src);
    
    
    
    
        setMouseCallback("src",onMouse);
    
        waitKey();
        return 0;
    }

cpp\_time时间格式化

time_t tm;
        time(&tm);
        struct tm *t2 = localtime(&tm);
        char buf[1024];
        strftime(buf, sizeof(buf), "%c", t2);

cpp\_opencv\_VideoCapture视频处理

vector<Mat> frames;//储存图片
        VideoCapture video(0); //从摄像头获取数据
        //VideoCapture video("./data/twotiger.avi"); //从视频文件读取数据
        bool isOpened = video.isOpened();
        if (isOpened) {
            cout << "视频是否打开成功：" << isOpened << endl;
            //  获取图片的信息:帧率
            double fps = video.get(CAP_PROP_FPS);
            //获取每帧宽度
            double width = video.get(CAP_PROP_FRAME_WIDTH);
            //获取每帧的高度
            double height = video.get(CAP_PROP_FRAME_HEIGHT);
            cout << "帧率：：" << fps << endl;
            cout << "宽度：" << width << endl;
            cout << "高度" << height << endl;
            //从视频中读取8帧信息
            int count = 0;
            while (count < 8) {
                count = count + 1;
                // 读取成功or失败， 当前帧数据
                Mat frame;
                bool flag = video.read(frame);
                //将图片信息写入到文件中
                if (flag) {
                    frames.push_back(frame);
                }
                cout << "图片截取完成啦" << endl;
            }
        }

cpp\_opencv\_findChessboardCorners相机标定查找及保存角点

/*查找及保存角点 方格图*/  
    /*视频读取图片*/
        /*vector<Mat> frames;//储存图片
        VideoCapture video(0); //从摄像头获取数据
        //VideoCapture video("./data/twotiger.avi"); //从视频文件读取数据
        bool isOpened = video.isOpened();
        if (isOpened) {
            cout << "视频是否打开成功：" << isOpened << endl;
            //  获取图片的信息:帧率
            double fps = video.get(CAP_PROP_FPS);
            //获取每帧宽度
            double width = video.get(CAP_PROP_FRAME_WIDTH);
            //获取每帧的高度
            double height = video.get(CAP_PROP_FRAME_HEIGHT);
            cout << "帧率：：" << fps << endl;
            cout << "宽度：" << width << endl;
            cout << "高度" << height << endl;
            //从视频中读取8帧信息
            int count = 0;
            while (count < 8) {
                count = count + 1;
                // 读取成功or失败， 当前帧数据
                Mat frame;
                bool flag = video.read(frame);
                //将图片信息写入到文件中
                if (flag) {
                    frames.push_back(frame);
                }
                cout << "图片截取完成啦" << endl;
            }
        }*/
    
    
    //储存所有图片路径
        vector<String> filePaths;
    //加载所有图片路径
        cv::glob("./data/image_*.jpg", filePaths);
        Size patternsize(6, 9);//图片角点　方格与方格的角点
        int square_size = 20;//方格的尺寸
        Size imageSize;//图片大小
        vector<vector<Point3f>> objectPoints;
        vector<vector<Point2f>> imagePoints;
    //遍历图片路径，读取所有图片
        for (String filePath:filePaths) {
            //读取图片
            Mat image = imread(filePath, IMREAD_COLOR);
            cout << image.size() << endl;
            Mat img, gray;//复制图片　，及创建灰度图
            image.copyTo(img);
            imageSize = img.size();
            // 创建灰度图
            cvtColor(img, gray, COLOR_BGR2GRAY);
            vector<Point2f> corners; //找到的角点　this will be filled by the detected corners
            //找到这些图片的角点，（（绘制）2D
            //参数１：图片的灰度图　参数２：patternsize　图片的角点　[宽(列)，高(行)] 参数3：corners 找到的角点　 参数４：都加上，CALIB_CB_ADAPTIVE_THRESH ， CALIB_CB_FAST_CHECK:快速图片检测
            bool patternfound = findChessboardCorners(gray, patternsize, corners,
                                                      CALIB_CB_ADAPTIVE_THRESH + CALIB_CB_NORMALIZE_IMAGE
                                                      + CALIB_CB_FAST_CHECK);
            if (patternfound)//优化查找的结果　官方代码
                cornerSubPix(gray, corners, Size(11, 11), Size(-1, -1),
                             TermCriteria(CV_TERMCRIT_EPS + CV_TERMCRIT_ITER, 30, 0.1));
            //画上角点　　　　　　　　　　　
            //参数１：图片的灰度图　参数２：patternsize　图片的角点　[宽(列)，高(行)] 参数3：corners 找到的角点　参数４：findChessboardCorners查找角点的返回值
            drawChessboardCorners(img, patternsize, corners, patternfound);
    
            //生成对应的３ｄ坐标
            vector<Point3f> obj_points;
            /**
             * x,y,z (列，行，ｚ)
            * [0, 0, 0] [1, 0, 0], [2, 0, 0] ... [5, 0, 0]
            * [0, 1, 0] [1, 1, 0], [2, 1, 0] ... [5, 1, 0]
            * ...
            * [0, 8, 0] [1, 8, 0], [2, 8, 0] ... [5, 8, 0]
            */
            // 高度
            for (int i = 0; i < patternsize.height; ++i) {
                // 宽度
                for (int j = 0; j < patternsize.width; ++j) {
                    //  obj_points.push_back(Point3f(j* square_size,i* square_size,0));
                    //square_size 方格的尺寸
                    obj_points.emplace_back(j * square_size, i * square_size, 0);
                }
            }
            objectPoints.push_back(obj_points);//再次封装３ｄ坐标　　格式：vector<vector<Point3f>> objectPoints;
            imagePoints.push_back(corners);    // 再次封装找到的角点　格式：vector<vector<Point2f>> imagePoints;
            // imshow("img",img);
            // waitKey(0);
        }
        cv::destroyAllWindows();
    
        Mat cameraMatrix; // 相机内参
        Mat distCoeffs;   // 畸变系数
        Mat rvecs, tvecs; // 标定板旋转，平移姿态
        // * 4. 执行标定 -> 相机内参+畸变系数
        //参数１：３ｄ坐标　参数２：３ｄ坐标找到的角点　参数３：图片大小　参数４：相机内参　参数５：畸变系数　参数６：rvecs标定板旋转　参数７：tvecs平移姿态
        double rms = calibrateCamera(objectPoints, imagePoints, imageSize, cameraMatrix, distCoeffs, rvecs, tvecs);
    
        std::cout << "cameraMatrix相机内参: \n" << cameraMatrix << std::endl;
        std::cout << "distCoeffs畸变系数: \n" << distCoeffs << std::endl;
        std::cout << "rms: \n" << rms << std::endl;
    
        //    * 5. 保存这些内参
        time_t tm;
        time(&tm);
        struct tm *t2 = localtime(&tm);
        char buf[1024];
        strftime(buf, sizeof(buf), "%c", t2);
    
        // 图片宽高，标定版数量，标定版尺寸，格子大小，时间
        // FileStorage fs("./calibration.xml", FileStorage::WRITE);
        FileStorage fs("./calibration.yml", FileStorage::WRITE);
        fs << "time" << buf;//时间标定版尺寸
        fs << "rms" << rms;
        fs << "board_count" << (int) filePaths.size();//图片数量
        fs << "board_size" << patternsize;   // 标定版尺寸
        fs << "board_square" << square_size; // 格子大小
        fs << "image_width" << imageSize.width;//图片宽带
        fs << "image_height" << imageSize.height;//图片高度
        fs << "cameraMatrix" << cameraMatrix;//相机内参
        fs << "distCoeffs" << distCoeffs;//畸变系数
        fs.release();

cpp\_opencv\_CommandLineParser获取键盘输入的参数

int main(int argc, char **argv) {    
      //获取键盘输入的参数
        cv::CommandLineParser parser(argc, argv, "{@arg1||}{@arg2||}{@arg3||}{@arg4|15|}"
                                                 "{scale s|1.0|}{flip f||}{help h||}");//导入opencv2
        if (parser.has("h")) {//从键盘获取 判断用户是否输入的h值
            printHelp();
            return 0;
        }
        int board_width = parser.get<int>(0);//从键盘获取用户输入的第一位数字
        int board_height = parser.get<int>(1);//从键盘获取用户输入的第2位数字
        int square_size = parser.get<int>(2);//从键盘获取用户输入的第3位数字
        int board_num = parser.get<int>(3); //从键盘获取用户输入的第3位数字；ps：最大图片采集数量
        float image_scale = parser.get<float>("scale");//从键盘获取用户输入的scale 的值
        bool flipHorizontal = parser.has("f");//从键盘获取用户输入的f或flip 的值
    }

cpp\_opencv\_glob获取路径下的所有文件

// 图片像素尺寸
        Size imgSize;
        // 图片路径
        cv::String src_path = "./data/image_*.jpg";
        std::vector<String> filenames;
        cv::glob(src_path, filenames);//获取路径下所有文件名
        cout << "filenames.size:" << filenames.size() << endl;
        for (auto& imgName : filenames) {
            // 读取图片
            Mat img = imread(imgName, IMREAD_COLOR);
            // 获取图片像素尺寸
            imgSize = img.size();
            imshow("src",img);
            std::cout << "name: " << imgName<< " imgSize: " << imgSize << std::endl;
            //...
            waitKey(0); 
        }

cpp\_opencv\_findContours\_minAreaRect\_getRotationMatrix2D查找轮廓\_外切矩形\_按最小矩形旋转

// 查找轮廓
        vector<vector<Vec2i>> contours;
        vector<Vec4i> hierarchy;
        findContours(binary,contours,hierarchy,CV_RETR_EXTERNAL,CV_CHAIN_APPROX_NONE);
    
    
        RotatedRect resultRect;
    
        // 遍历轮廓，求轮廓的最大外切矩形
        for(int i = 0; i<contours.size();i++){
            // 取到当前遍历轮廓
            RotatedRect rect = minAreaRect(contours[i]);
            if(rect.size.width > img.size().width*0.75){
                // 绘制轮廓
                //drawContours(img,contours,i,Scalar(255,0,255),2,LINE_AA);
                // 记录外切矩形
                resultRect = rect;
            }
        }
    
        // 打印图片需要旋转的角度
        cout<<resultRect.angle<<endl;
    
        // 先对图片进行旋转
        Point2f center(img.cols/2,img.rows/2);
        Mat matrix = getRotationMatrix2D(center,(resultRect.angle)+90,1);
    
        warpAffine(img,outputImg,matrix,img.size());
    
        imshow("rotateimg",outputImg);

cpp\_pcl\_main\_CloudViewer3d点云main

#include <iostream>
    #include <pcl/io/io.h>
    #include <pcl/io/pcd_io.h>
    #include <pcl/visualization/cloud_viewer.h>
    
    int main(int argc, char **argv) {
    
        // 创建PointCloud的智能指针
        pcl::PointCloud<pcl::PointXYZRGBA>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZRGBA>);
        // 加载pcd文件到cloud
        pcl::io::loadPCDFile("./data/pcl_logo.pcd", *cloud);
        pcl::visualization::CloudViewer viewer("Cloud Viewer");
        //这里会一直阻塞直到点云被渲染
        viewer.showCloud(cloud);
    
        // 循环判断是否退出
        while (!viewer.wasStopped()) {
            // 你可以在这里对点云做很多处理
        }
        return 0;
    }

cpp\_main纯

#include <iostream>
    
    int main(int argc, char *argv[]) {
    
        return 0;
    }

cpp\_pcl\_CloudViewer点云设置背景色添加文字，形状

#include <pcl/visualization/cloud_viewer.h>
    #include <iostream>
    #include <pcl/io/io.h>
    #include <pcl/io/pcd_io.h>
    
    int user_data;
    
    void
    viewerOneOff(pcl::visualization::PCLVisualizer &viewer) {
        // 设置背景色为粉红色
        viewer.setBackgroundColor(1.0, 0.5, 1.0);
        pcl::PointXYZ o;
        o.x = 1.0;
        o.y = 0;
        o.z = 0;
        //    添加一个圆心为o，半径为0.25m的球体 最后以为 参数1的时候不显示图片
        viewer.addSphere(o, 0.25, "sphere", 0);
        std::cout << "i only run once" << std::endl;
    }
    
    void
    viewerPsycho(pcl::visualization::PCLVisualizer &viewer) {
        static unsigned count = 0;
        std::stringstream ss;
        ss << "Once per viewer loop: " << count++;
        // 每次刷新时，移除text，添加新的text
        viewer.removeShape("text", 0);
        viewer.addText(ss.str(), 200, 300, "text", 0);
    
        //FIXME: possible race condition here:
        user_data++;
    }
    
    int
    main() {
        pcl::PointCloud<pcl::PointXYZRGBA>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZRGBA>);
        pcl::io::loadPCDFile("./data/pcl_logo.pcd", *cloud);
        pcl::visualization::CloudViewer viewer("Cloud Viewer");
    
        //这里会一直阻塞直到点云被渲染
        viewer.showCloud(cloud);
    
        // 只会调用一次 (非必须)
        viewer.runOnVisualizationThreadOnce (viewerOneOff);
        // 每次可视化迭代都会调用一次（频繁调用） (非必须)
        viewer.runOnVisualizationThread (viewerPsycho);
        while (!viewer.wasStopped()) {
            user_data++;
        }
        return 0;
    }

cpp\_pcl\_PCLVisualizer\_viewer点云点云设置个纯色添加一个坐标系\_main

#include <pcl/io/io.h>
    #include <pcl/io/pcd_io.h>
    #include <pcl/visualization/pcl_visualizer.h>
    
    int main(int argc, char **argv) {
        pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
        pcl::io::loadPCDFile("./data/bunny.pcd", *cloud);
    
        pcl::PointCloud<pcl::PointXYZRGB>::Ptr cloud_milk(new pcl::PointCloud<pcl::PointXYZRGB>);
        pcl::io::loadPCDFile("./data/milk_color.pcd", *cloud_milk);
    
        // 创建PCLVisualizer
        boost::shared_ptr<pcl::visualization::PCLVisualizer> viewer (new pcl::visualization::PCLVisualizer ("3D Viewer"));
    
        // 设置背景色为灰色（非必须）
        viewer->setBackgroundColor (0.05, 0.05, 0.05, 0);
    
        // 添加一个普通点云 (可以设置指定颜色，也可以去掉single_color参数不设置)
        pcl::visualization::PointCloudColorHandlerCustom<pcl::PointXYZ> single_color(cloud, 0, 255, 0);
        viewer->addPointCloud<pcl::PointXYZ> (cloud, single_color, "sample cloud");
        viewer->setPointCloudRenderingProperties (pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 2, "sample cloud");
    
        // 再添加一个彩色点云及配置
        pcl::visualization::PointCloudColorHandlerRGBField<pcl::PointXYZRGB> rgb(cloud_milk);
        viewer->addPointCloud<pcl::PointXYZRGB> (cloud_milk, rgb, "sample cloud milk");
        viewer->setPointCloudRenderingProperties (pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 3, "sample cloud milk");
    
        // 添加一个0.5倍缩放的坐标系（非必须）
        viewer->addCoordinateSystem (0.5);
    
        // 直到窗口关闭才结束循环
        while (!viewer->wasStopped()) {
            // 每次循环调用内部的重绘函数
            viewer->spinOnce();
        }
        return 0;
    }

cpp\_pcl\_PCLVisualizer\_viewer点云点云设置个纯色添加一个坐标系

pcl::visualization::PCLVisualizer::Ptr viewer(new pcl::visualization::PCLVisualizer("3D_Viewer"));
    viewer->setBackgroundColor(0.05, 0.05, 0.05, 0);
        // 给点云设置个纯色
        pcl::visualization::PointCloudColorHandlerCustom<pcl::PointXYZ> single_color(cloud, 255, 255, 0);
        viewer->addPointCloud<pcl::PointXYZ>(cloud, single_color, "sample_cloud");
        viewer->setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 2, "sample_cloud");
     // 添加一个坐标系
        viewer->addCoordinateSystem(0.5);
        while (!viewer->wasStopped()) {
            // 每次循环手动调用渲染函数
            viewer->spinOnce();
        }

cpp\_pcl\_矩阵变换旋转平移\_main

#include <iostream>
    
    #include <pcl/io/pcd_io.h>
    #include <pcl/io/ply_io.h>
    #include <pcl/point_cloud.h>
    #include <pcl/console/parse.h>
    #include <pcl/common/transforms.h>
    #include <pcl/visualization/pcl_visualizer.h>
    
    /**
     * 旋转并平移
     * @param argc
     * @param argv
     * @return
     */
    int
    main(int argc, char **argv) {
    
    
        // Load file | Works with PCD and PLY files
        pcl::PointCloud<pcl::PointXYZ>::Ptr source_cloud(new pcl::PointCloud<pcl::PointXYZ>());
    
        if (pcl::io::loadPCDFile(argv[1], *source_cloud) < 0) {
            std::cout << "Error loading point cloud " << argv[1] << std::endl << std::endl;
            return -1;
        }
    
        /* Reminder: how transformation matrices work :
    
                 |-------> This column is the translation
          | 1 0 0 x |  \
          | 0 1 0 y |   }-> The identity 3x3 matrix (no rotation) on the left
          | 0 0 1 z |  /
          | 0 0 0 1 |    -> We do not use this line (and it has to stay 0,0,0,1)
    
          METHOD #1: Using a Matrix4f
          This is the "manual" method, perfect to understand but error prone !
        */
        Eigen::Matrix4f transform_1 = Eigen::Matrix4f::Identity();
    
        // Define a rotation matrix (see https://en.wikipedia.org/wiki/Rotation_matrix)
        float theta = M_PI / 4; // The angle of rotation in radians
        transform_1(0, 0) = cos(theta);
        transform_1(0, 1) = -sin(theta);
        transform_1(1, 0) = sin(theta);
        transform_1(1, 1) = cos(theta);
        //    (row, column)
    
        // Define a translation of 2.5 meters on the x axis.
        transform_1(0, 3) = 2.5;
    
        // Print the transformation
        printf("Method #1: using a Matrix4f\n");
        std::cout << transform_1 << std::endl;
    
        /*  METHOD #2: Using a Affine3f
          This method is easier and less error prone
        */
        Eigen::Affine3f transform_2 = Eigen::Affine3f::Identity();
    
        // Define a translation of 0.8 meters on the x axis.
        transform_2.translation() << 0.8, 0.0, 0.0;
    
        // The same rotation matrix as before; theta radians arround Z axis
        transform_2.rotate(Eigen::AngleAxisf(theta, Eigen::Vector3f::UnitZ()));
    
        // Print the transformation
        printf("\nMethod #2: using an Affine3f\n");
        std::cout << transform_2.matrix() << std::endl;
    
        // Executing the transformation
        pcl::PointCloud<pcl::PointXYZ>::Ptr transformed_cloud(new pcl::PointCloud<pcl::PointXYZ>());
        // You can either apply transform_1 or transform_2; they are the same
        pcl::transformPointCloud(*source_cloud, *transformed_cloud, transform_2);
    
        // Visualization
        printf("\nPoint cloud colors :  white  = original point cloud\n"
               "                        red  = transformed point cloud\n");
        pcl::visualization::PCLVisualizer viewer("Matrix transformation example");
    
        // Define R,G,B colors for the point cloud
        pcl::visualization::PointCloudColorHandlerCustom<pcl::PointXYZ> source_cloud_color_handler(source_cloud, 255, 255,
                                                                                                   255);
        // We add the point cloud to the viewer and pass the color handler
        viewer.addPointCloud(source_cloud, source_cloud_color_handler, "original_cloud");
    
        pcl::visualization::PointCloudColorHandlerCustom<pcl::PointXYZ> transformed_cloud_color_handler(transformed_cloud,
                                                                                                        230, 20, 20); // Red
        viewer.addPointCloud(transformed_cloud, transformed_cloud_color_handler, "transformed_cloud");
    
        // 设置坐标系系统
        viewer.addCoordinateSystem(0.5, "cloud", 0);
        // 设置背景色
        viewer.setBackgroundColor(0.05, 0.05, 0.05, 0); // Setting background to a dark grey
        // 设置渲染属性（点大小）
        viewer.setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 2, "original_cloud");
        // 设置渲染属性（点大小）
        viewer.setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 2, "transformed_cloud");
        //viewer.setPosition(800, 400); // Setting visualiser window position
    
        while (!viewer.wasStopped()) { // Display the visualiser until 'q' key is pressed
            viewer.spinOnce();
        }
    
        return 0;
    }

cpp\_pcl\_矩阵变换旋转平移2种方法

/* Reminder: how transformation matrices work :
                 |-------> This column is the translation
          | 1 0 0 x |  \
          | 0 1 0 y |   }-> The identity 3x3 matrix (no rotation) on the left
          | 0 0 1 z |  /
          | 0 0 0 1 |    -> We do not use this line (and it has to stay 0,0,0,1)
          METHOD #1: Using a Matrix4f
          This is the "manual" method, perfect to understand but error prone !
        */
        Eigen::Matrix4f transform_1 = Eigen::Matrix4f::Identity();
     // 绕z轴顺时针旋转45°
        float theta = - M_PI / 4;
        transform_1(0, 0) = cos(theta);
        transform_1(0, 1) =-sin(theta);
        transform_1(1, 0) = sin(theta);
        transform_1(1, 1) = cos(theta);
        // 在x轴方向上平移1.5m
        transform_1(0, 3) = 1.5;
    
        std::cout << "transform_1:\n" << transform_1 << std::endl;
    
        // 方式二：使用Eigen提供的仿射变换对象 ---------------------------------------------------
        Eigen::Affine3f transform_2 = Eigen::Affine3f::Identity();
        // 执行旋转操作 z逆时针30度
        transform_2.rotate(Eigen::AngleAxisf(DEG2RAD(30), Eigen::Vector3f::UnitZ()));
    
        // 执行x平移操作 平移1m
        transform_2.translation() << 1.0, 0, 0;
        std::cout << "transform_2:\n" << transform_2.matrix() << std::endl;
    
        // 执行变换并将之输出到transformed_cloud中
        pcl::PointCloud<pcl::PointXYZ>::Ptr transformed_cloud(new pcl::PointCloud<pcl::PointXYZ>);
        pcl::transformPointCloud(*cloud, *transformed_cloud, transform_2);
       // pcl::transformPointCloud(*cloud, *transformed_cloud, transform_1);
        //显示
        viewer->addPointCloud<pcl::PointXYZ>(transformed_cloud, "sample_cloud1");
        //viewer->addPointCloud<pcl::PointXYZ>(transformed_cloud, "sample_cloud2");
        // 添加一个坐标系
        viewer->addCoordinateSystem(0.5);
    
        while (!viewer->wasStopped()) {
            // 每次循环手动调用渲染函数
            viewer->spinOnce();
        }

cpp\_pcl\_反序列化\_main

#include <iostream>
    #include <pcl/io/pcd_io.h>
    #include <pcl/point_types.h>
    
    int
    main(int argc, char **argv) {
        // 准备pcl::PointXYZ类型的点云
        pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
        // 将pcd中的数据加载到cloud中
        if (pcl::io::loadPCDFile<pcl::PointXYZ>("./data/bunny.pcd", *cloud) == -1) //* load the file
        {
            PCL_ERROR ("Couldn't read file bunny.pcd \n");
            return (-1);
        }
        std::cout << "Loaded "
                  << cloud->width * cloud->height
                  << " data points from test_pcd.pcd with the following fields: "
                  << std::endl;
        for (size_t i = 0; i < cloud->points.size(); ++i)
            std::cout << "    " << cloud->points[i].x
                      << " " << cloud->points[i].y
                      << " " << cloud->points[i].z << std::endl;
    
        return (0);
    }

cpp\_pcl\_序列化\_main

#include <iostream>
    #include <pcl/io/io.h>
    #include <pcl/io/pcd_io.h>
    
    using namespace std;
    
    /**
     * 点云的序列化
     */
    int main(int argc, char *argv[]) {
    
        pcl::PointCloud<pcl::PointXYZ> cloud;
    
        cloud.width = 5;
        cloud.height = 1;
        cloud.is_dense = false;
        uint32_t points_count = cloud.width * cloud.height;
        cloud.points.resize(points_count);
    
        // 生成一些随机数， 写到文件
        for (int i = 0; i < points_count; ++i) {
            //  (0 -> 1.0) * 1024.0f >> 0 -> 1024.0f
            cloud.points[i].x = 1024.0f * (rand() / (RAND_MAX + 1.0f));
            cloud.points[i].y = 1024.0f * (rand() / (RAND_MAX + 1.0f));
            cloud.points[i].z = 1024.0f * (rand() / (RAND_MAX + 1.0f));
            std::cout <<
                    "x: " << cloud.points[i].x <<
                    " y: " << cloud.points[i].y <<
                    " z: " << cloud.points[i].z <<
                    std::endl;
        }
        pcl::io::savePCDFileASCII("./output/pcd_ascii.pcd", cloud);
        pcl::io::savePCDFileBinary("./output/pcd_binary.pcd", cloud);
        pcl::io::savePCDFileBinaryCompressed("./output/pcd_binary_compressed.pcd", cloud);
        pcl::io::savePCDFile("./output/pcd_save.pcd", cloud, true); // savePCDFileBinary
    
    
    }

cpp\_pcl\_k-dtree-两种方法main

#include <pcl/point_cloud.h>
    #include <pcl/kdtree/kdtree_flann.h>
    
    #include <iostream>
    #include <vector>
    #include <ctime>
    //#include <pcl/search/kdtree.h>
    //#include <pcl/search/impl/search.hpp>
    #include <pcl/visualization/cloud_viewer.h>
    
    int
    main(int argc, char **argv) {
        // 用系统时间初始化随机种子
        srand(time(NULL));
    
        pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
    
        // 生成点云数据1000个
        cloud->width = 1000;
        cloud->height = 1;  // 1 表示点云为无序点云
        cloud->points.resize(cloud->width * cloud->height);
    
        // 给点云填充数据 0 - 1023
        for (size_t i = 0; i < cloud->points.size(); ++i) {
            cloud->points[i].x = 1024.0f * rand() / (RAND_MAX + 1.0f);
            cloud->points[i].y = 1024.0f * rand() / (RAND_MAX + 1.0f);
            cloud->points[i].z = 1024.0f * rand() / (RAND_MAX + 1.0f);
        }
    
        // 创建KdTree的实现类KdTreeFLANN (Fast Library for Approximate Nearest Neighbor)
        pcl::KdTreeFLANN<pcl::PointXYZ> kdtree;
        // pcl::search::KdTree<pcl::PointXYZ> kdtree;
        // 设置搜索空间，把cloud作为输入
        kdtree.setInputCloud(cloud);
    
        // 初始化一个随机的点，作为查询点
        pcl::PointXYZ searchPoint;
        searchPoint.x = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.y = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.z = 1024.0f * rand() / (RAND_MAX + 1.0f);
    
        // K nearest neighbor search
        // 方式一：搜索K个最近邻居
    
        // 创建K和两个向量来保存搜索到的数据
        // K = 10 表示搜索10个临近点
        // pointIdxNKNSearch        保存搜索到的临近点的索引
        // pointNKNSquaredDistance  保存对应临近点的距离的平方
        int K = 10;
        std::vector<int> pointIdxNKNSearch(K);
        std::vector<float> pointNKNSquaredDistance(K);
    
        std::cout << "K nearest neighbor search at (" << searchPoint.x
                  << " " << searchPoint.y
                  << " " << searchPoint.z
                  << ") with K=" << K << std::endl;
    
        if (kdtree.nearestKSearch(searchPoint, K, pointIdxNKNSearch, pointNKNSquaredDistance) > 0) {
            for (size_t i = 0; i < pointIdxNKNSearch.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxNKNSearch[i]].x
                          << " " << cloud->points[pointIdxNKNSearch[i]].y
                          << " " << cloud->points[pointIdxNKNSearch[i]].z
                          << " (距离平方: " << pointNKNSquaredDistance[i] << ")" << std::endl;
        }
    
        // Neighbors within radius search
        // 方式二：通过指定半径搜索
        std::vector<int> pointIdxRadiusSearch;
        std::vector<float> pointRadiusSquaredDistance;
    
        // 创建一个随机[0,256)的半径值
        float radius = 256.0f * rand() / (RAND_MAX + 1.0f);
    
        std::cout << "Neighbors within radius search at (" << searchPoint.x
                  << " " << searchPoint.y
                  << " " << searchPoint.z
                  << ") with radius=" << radius << std::endl;
    
    
        if (kdtree.radiusSearch(searchPoint, radius, pointIdxRadiusSearch, pointRadiusSquaredDistance) > 0) {
            for (size_t i = 0; i < pointIdxRadiusSearch.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxRadiusSearch[i]].x
                          << " " << cloud->points[pointIdxRadiusSearch[i]].y
                          << " " << cloud->points[pointIdxRadiusSearch[i]].z
                          << " (距离平方:: " << pointRadiusSquaredDistance[i] << ")" << std::endl;
        }
    
        pcl::visualization::PCLVisualizer viewer("PCL Viewer");
        viewer.setBackgroundColor(0.0, 0.0, 0.5);
        viewer.addPointCloud<pcl::PointXYZ>(cloud, "cloud");
    
        pcl::PointXYZ originPoint(0.0, 0.0, 0.0);
        // 添加从原点到搜索点的线段
        viewer.addLine(originPoint, searchPoint);
        // 添加一个以搜索点为圆心，搜索半径为半径的球体
        viewer.addSphere(searchPoint, radius, "sphere", 0);
        // 添加一个放到200倍后的坐标系
        viewer.addCoordinateSystem(200);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
        }
    
        return 0;
    }

cpp\_pcl\_k-dtree\_nearestKSearch邻近法搜索

// 创建KdTree的实现类KdTreeFLANN (Fast Library for Approximate Nearest Neighbor)
        pcl::KdTreeFLANN<pcl::PointXYZ> kdtree;
        // pcl::search::KdTree<pcl::PointXYZ> kdtree;
        // 设置搜索空间，把cloud作为输入
        kdtree.setInputCloud(cloud);
    
        // 初始化一个随机的点，作为查询点
        pcl::PointXYZ searchPoint;
        searchPoint.x = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.y = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.z = 1024.0f * rand() / (RAND_MAX + 1.0f);
    
        // K nearest neighbor search
        // 方式一：搜索K个最近邻居
    
        // 创建K和两个向量来保存搜索到的数据
        // K = 10 表示搜索10个临近点
        // pointIdxNKNSearch        保存搜索到的临近点的索引
        // pointNKNSquaredDistance  保存对应临近点的距离的平方
        int K = 10;
        std::vector<int> pointIdxNKNSearch(K);
        std::vector<float> pointNKNSquaredDistance(K);
    
        std::cout << "K nearest neighbor search at (" << searchPoint.x
                  << " " << searchPoint.y
                  << " " << searchPoint.z
                  << ") with K=" << K << std::endl;
       // 执行knn -> k邻域搜索， 返回值邻居的个数
        if (kdtree.nearestKSearch(searchPoint, K, pointIdxNKNSearch, pointNKNSquaredDistance) > 0) {
            for (size_t i = 0; i < pointIdxNKNSearch.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxNKNSearch[i]].x
                          << " " << cloud->points[pointIdxNKNSearch[i]].y
                          << " " << cloud->points[pointIdxNKNSearch[i]].z
                          << " (距离平方: " << pointNKNSquaredDistance[i] << ")" << std::endl;
        }
    
      // 显示
       pcl::visualization::PCLVisualizer viewer("PCL Viewer");
        viewer.setBackgroundColor(0.0, 0.0, 0.5);
        viewer.addPointCloud<pcl::PointXYZ>(cloud, "cloud");
       // 添加从原点到搜索点的线段
        viewer.addLine(originPoint, searchPoint);
        // 添加一个放到200倍后的坐标系
        viewer.addCoordinateSystem(200);
    
      while (!viewer.wasStopped()) {
            viewer.spinOnce();
        }

cpp\_pcl\_k-dtree\_radiusSearch半径搜索

// Neighbors within radius search
        // 方式二：通过指定半径搜索
        std::vector<int> pointIdxRadiusSearch;
       // 准备好输出结果列表 - 邻居距离平方的列表
        std::vector<float> pointRadiusSquaredDistance;
    
        // 创建一个随机[0,256)的半径值
        float radius = 256.0f * rand() / (RAND_MAX + 1.0f);
    
        std::cout << "Neighbors within radius search at (" << searchPoint.x
                  << " " << searchPoint.y
                  << " " << searchPoint.z
                  << ") with radius=" << radius << std::endl;
    
    
        if (kdtree.radiusSearch(searchPoint, radius, pointIdxRadiusSearch, pointRadiusSquaredDistance) > 0) {
            for (size_t i = 0; i < pointIdxRadiusSearch.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxRadiusSearch[i]].x
                          << " " << cloud->points[pointIdxRadiusSearch[i]].y
                          << " " << cloud->points[pointIdxRadiusSearch[i]].z
                          << " (距离平方:: " << pointRadiusSquaredDistance[i] << ")" << std::endl;
        }
        //显示
        pcl::visualization::PCLVisualizer viewer("PCL Viewer");
        viewer.setBackgroundColor(0.0, 0.0, 0.5);
        viewer.addPointCloud<pcl::PointXYZ>(cloud, "cloud");
    
        pcl::PointXYZ originPoint(0.0, 0.0, 0.0);
        // 添加一个以搜索点为圆心，搜索半径为半径的球体
        viewer.addSphere(searchPoint, radius, "sphere", 0);
        // 添加一个放到200倍后的坐标系
        viewer.addCoordinateSystem(200);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
        }

cpp\_pcl\_octree八叉树搜索\_main

#include <pcl/point_cloud.h>
    #include <pcl/octree/octree_search.h>
    
    #include <iostream>
    #include <vector>
    #include <ctime>
    #include <pcl/visualization/cloud_viewer.h>
    
    int
    main(int argc, char **argv) {
        srand((unsigned int) time(NULL));
    
        pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
    
        // Generate pointcloud data
        cloud->width = 1000;
        cloud->height = 1;
        cloud->points.resize(cloud->width * cloud->height);
    
        for (size_t i = 0; i < cloud->points.size(); ++i) {
            cloud->points[i].x = 1024.0f * rand() / (RAND_MAX + 1.0f);
            cloud->points[i].y = 1024.0f * rand() / (RAND_MAX + 1.0f);
            cloud->points[i].z = 1024.0f * rand() / (RAND_MAX + 1.0f);
        }
    
    //    float resolution = 0.01f;
        // 设置分辨率为128
        float resolution = 128.0f;
        // resolution该参数描述了octree叶子leaf节点的最小体素尺寸。
        pcl::octree::OctreePointCloudSearch<pcl::PointXYZ> octree(resolution);
        // 设置输入点云
        octree.setInputCloud(cloud);
        // 通过点云构建octree
        octree.addPointsFromInputCloud();
    
        pcl::PointXYZ searchPoint;
    
        searchPoint.x = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.y = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.z = 1024.0f * rand() / (RAND_MAX + 1.0f);
    
        // Neighbors within voxel search
        // 方式一：“体素近邻搜索”,它把查询点所在的体素中其他点的索引作为查询结果返回,
        // 结果以点索引向量的形式保存,因此搜索点和搜索结果之间的距离取决于八叉树的分辨率参数
        std::vector<int> pointIdxVec;
    
        if (octree.voxelSearch(searchPoint, pointIdxVec)) {
            std::cout << "Neighbors within voxel search at (" << searchPoint.x
                      << " " << searchPoint.y
                      << " " << searchPoint.z << ")"
                      << std::endl;
    
            for (size_t i = 0; i < pointIdxVec.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxVec[i]].x
                          << " " << cloud->points[pointIdxVec[i]].y
                          << " " << cloud->points[pointIdxVec[i]].z << std::endl;
        }
    
        // K nearest neighbor search
        // 方式二：K 近邻搜索,本例中K被设置成10, "K 近邻搜索”方法把搜索结果写到两个分开的向量中,
        // 第一个pointIdxNKNSearch 包含搜索结果〈结果点的索引的向量〉
        // 第二个pointNKNSquaredDistance 保存相应的搜索点和近邻之间的距离平方。
        int K = 10;
    
        std::vector<int> pointIdxNKNSearch;
        std::vector<float> pointNKNSquaredDistance;
    
        std::cout << "K nearest neighbor search at (" << searchPoint.x
                  << " " << searchPoint.y
                  << " " << searchPoint.z
                  << ") with K=" << K << std::endl;
    
        if (octree.nearestKSearch(searchPoint, K, pointIdxNKNSearch, pointNKNSquaredDistance) > 0) {
            for (size_t i = 0; i < pointIdxNKNSearch.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxNKNSearch[i]].x
                          << " " << cloud->points[pointIdxNKNSearch[i]].y
                          << " " << cloud->points[pointIdxNKNSearch[i]].z
                          << " (squared distance: " << pointNKNSquaredDistance[i] << ")" << std::endl;
        }
    
        // Neighbors within radius search
        // 方式三：半径内近邻搜索
        // “半径内近邻搜索”原理和“K 近邻搜索”类似,它的搜索结果被写入两个分开的向量中,
        // 这两个向量分别存储结果点的索引和对应的距离平方
        std::vector<int> pointIdxRadiusSearch;
        std::vector<float> pointRadiusSquaredDistance;
    
        float radius = 256.0f * rand() / (RAND_MAX + 1.0f);
    
        std::cout << "Neighbors within radius search at (" << searchPoint.x
                  << " " << searchPoint.y
                  << " " << searchPoint.z
                  << ") with radius=" << radius << std::endl;
    
    
        if (octree.radiusSearch(searchPoint, radius, pointIdxRadiusSearch, pointRadiusSquaredDistance) > 0) {
            for (size_t i = 0; i < pointIdxRadiusSearch.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxRadiusSearch[i]].x
                          << " " << cloud->points[pointIdxRadiusSearch[i]].y
                          << " " << cloud->points[pointIdxRadiusSearch[i]].z
                          << " (squared distance: " << pointRadiusSquaredDistance[i] << ")" << std::endl;
        }
    
        //显示
    pcl::visualization::PCLVisualizer viewer("PCL Viewer");
        viewer.setBackgroundColor(0.0, 0.0, 0.5);
        viewer.addPointCloud<pcl::PointXYZ>(cloud, "cloud");
    
        pcl::PointXYZ originPoint(0.0, 0.0, 0.0);
        // 添加从原点到搜索点的线段
        viewer.addLine(originPoint, searchPoint);
        // 添加一个以搜索点为圆心，搜索半径为半径的球体
        viewer.addSphere(searchPoint, radius, "sphere", 0);
        // 添加一个放到200倍后的坐标系
        viewer.addCoordinateSystem(200);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
        }
    
    }

cpp\_pcl\_随机创建点云图\_main

cpp\_srand随机种子

#include <ctime>
    //放main方法下面 
    srand((unsigned int) time(NULL));

cpp\_rand取随机值

1024.0f * rand() / (RAND_MAX + 1.0f)

cpp\_pcl\_octree八叉树搜索\_main

#include <pcl/point_cloud.h>
    #include <pcl/octree/octree_search.h>
    
    #include <iostream>
    #include <vector>
    #include <ctime>
    #include <pcl/visualization/cloud_viewer.h>
    
    int
    main(int argc, char **argv) {
        srand((unsigned int) time(NULL));
    
        pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
    
        // Generate pointcloud data
        cloud->width = 1000;
        cloud->height = 1;
        cloud->points.resize(cloud->width * cloud->height);
    
        for (size_t i = 0; i < cloud->points.size(); ++i) {
            cloud->points[i].x = 1024.0f * rand() / (RAND_MAX + 1.0f);
            cloud->points[i].y = 1024.0f * rand() / (RAND_MAX + 1.0f);
            cloud->points[i].z = 1024.0f * rand() / (RAND_MAX + 1.0f);
        }
    
    //    float resolution = 0.01f;
        // 设置分辨率为128
        float resolution = 128.0f;
        // resolution该参数描述了octree叶子leaf节点的最小体素尺寸。
        pcl::octree::OctreePointCloudSearch<pcl::PointXYZ> octree(resolution);
        // 设置输入点云
        octree.setInputCloud(cloud);
        // 通过点云构建octree
        octree.addPointsFromInputCloud();
    
        pcl::PointXYZ searchPoint;
    
        searchPoint.x = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.y = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.z = 1024.0f * rand() / (RAND_MAX + 1.0f);
    
        // Neighbors within voxel search
        // 方式一：“体素近邻搜索”,它把查询点所在的体素中其他点的索引作为查询结果返回,
        // 结果以点索引向量的形式保存,因此搜索点和搜索结果之间的距离取决于八叉树的分辨率参数
        std::vector<int> pointIdxVec;
    
        if (octree.voxelSearch(searchPoint, pointIdxVec)) {
            std::cout << "Neighbors within voxel search at (" << searchPoint.x
                      << " " << searchPoint.y
                      << " " << searchPoint.z << ")"
                      << std::endl;
    
            for (size_t i = 0; i < pointIdxVec.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxVec[i]].x
                          << " " << cloud->points[pointIdxVec[i]].y
                          << " " << cloud->points[pointIdxVec[i]].z << std::endl;
        }
    
        // K nearest neighbor search
        // 方式二：K 近邻搜索,本例中K被设置成10, "K 近邻搜索”方法把搜索结果写到两个分开的向量中,
        // 第一个pointIdxNKNSearch 包含搜索结果〈结果点的索引的向量〉
        // 第二个pointNKNSquaredDistance 保存相应的搜索点和近邻之间的距离平方。
        int K = 10;
    
        std::vector<int> pointIdxNKNSearch;
        std::vector<float> pointNKNSquaredDistance;
    
        std::cout << "K nearest neighbor search at (" << searchPoint.x
                  << " " << searchPoint.y
                  << " " << searchPoint.z
                  << ") with K=" << K << std::endl;
    
        if (octree.nearestKSearch(searchPoint, K, pointIdxNKNSearch, pointNKNSquaredDistance) > 0) {
            for (size_t i = 0; i < pointIdxNKNSearch.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxNKNSearch[i]].x
                          << " " << cloud->points[pointIdxNKNSearch[i]].y
                          << " " << cloud->points[pointIdxNKNSearch[i]].z
                          << " (squared distance: " << pointNKNSquaredDistance[i] << ")" << std::endl;
        }
    
        // Neighbors within radius search
        // 方式三：半径内近邻搜索
        // “半径内近邻搜索”原理和“K 近邻搜索”类似,它的搜索结果被写入两个分开的向量中,
        // 这两个向量分别存储结果点的索引和对应的距离平方
        std::vector<int> pointIdxRadiusSearch;
        std::vector<float> pointRadiusSquaredDistance;
    
        float radius = 256.0f * rand() / (RAND_MAX + 1.0f);
    
        std::cout << "Neighbors within radius search at (" << searchPoint.x
                  << " " << searchPoint.y
                  << " " << searchPoint.z
                  << ") with radius=" << radius << std::endl;
    
    
        if (octree.radiusSearch(searchPoint, radius, pointIdxRadiusSearch, pointRadiusSquaredDistance) > 0) {
            for (size_t i = 0; i < pointIdxRadiusSearch.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxRadiusSearch[i]].x
                          << " " << cloud->points[pointIdxRadiusSearch[i]].y
                          << " " << cloud->points[pointIdxRadiusSearch[i]].z
                          << " (squared distance: " << pointRadiusSquaredDistance[i] << ")" << std::endl;
        }
    
        pcl::visualization::PCLVisualizer viewer("PCL Viewer");
        viewer.setBackgroundColor(0.0, 0.0, 0.5);
        viewer.addPointCloud<pcl::PointXYZ>(cloud, "cloud");
    
        pcl::PointXYZ originPoint(0.0, 0.0, 0.0);
        // 添加从原点到搜索点的线段
        viewer.addLine(originPoint, searchPoint);
        // 添加一个以搜索点为圆心，搜索半径为半径的球体
        viewer.addSphere(searchPoint, radius, "sphere", 0);
        // 添加一个放到200倍后的坐标系
        viewer.addCoordinateSystem(200);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
        }
    
    }

cpp\_pcl\_octree八叉树搜索\_voxelSearch体素近邻搜索

//    float resolution = 0.01f;
        // 设置分辨率为128
        float resolution = 128.0f;
        // resolution该参数描述了octree叶子leaf节点的最小体素尺寸。
        pcl::octree::OctreePointCloudSearch<pcl::PointXYZ> octree(resolution);
        // 设置输入点云
        octree.setInputCloud(cloud);
        // 通过点云构建octree
        octree.addPointsFromInputCloud();
    
        pcl::PointXYZ searchPoint;
    
        searchPoint.x = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.y = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.z = 1024.0f * rand() / (RAND_MAX + 1.0f);
    
        // Neighbors within voxel search
        // 方式一：“体素近邻搜索”,它把查询点所在的体素中其他点的索引作为查询结果返回,
        // 结果以点索引向量的形式保存,因此搜索点和搜索结果之间的距离取决于八叉树的分辨率参数
        std::vector<int> pointIdxVec;
    
        if (octree.voxelSearch(searchPoint, pointIdxVec)) {
            std::cout << "Neighbors within voxel search at (" << searchPoint.x
                      << " " << searchPoint.y
                      << " " << searchPoint.z << ")"
                      << std::endl;
    
            for (size_t i = 0; i < pointIdxVec.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxVec[i]].x
                          << " " << cloud->points[pointIdxVec[i]].y
                          << " " << cloud->points[pointIdxVec[i]].z << std::endl;
        }
    
       //显示
    pcl::visualization::PCLVisualizer viewer("PCL Viewer");
        viewer.setBackgroundColor(0.0, 0.0, 0.5);
        viewer.addPointCloud<pcl::PointXYZ>(cloud, "cloud");
    
        pcl::PointXYZ originPoint(0.0, 0.0, 0.0);
      
        // 添加一个放到200倍后的坐标系
        viewer.addCoordinateSystem(200);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
        }

cpp\_pcl\_octree八叉树搜索\_nearestKSearch近邻搜索

//    float resolution = 0.01f;
        // 设置分辨率为128
        float resolution = 128.0f;
        // resolution该参数描述了octree叶子leaf节点的最小体素尺寸。
        pcl::octree::OctreePointCloudSearch<pcl::PointXYZ> octree(resolution);
        // 设置输入点云
        octree.setInputCloud(cloud);
        // 通过点云构建octree
        octree.addPointsFromInputCloud();
    
        pcl::PointXYZ searchPoint;
    
        searchPoint.x = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.y = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.z = 1024.0f * rand() / (RAND_MAX + 1.0f);
    
     // K nearest neighbor search
        // 方式二：K 近邻搜索,本例中K被设置成10, "K 近邻搜索”方法把搜索结果写到两个分开的向量中,
        // 第一个pointIdxNKNSearch 包含搜索结果〈结果点的索引的向量〉
        // 第二个pointNKNSquaredDistance 保存相应的搜索点和近邻之间的距离平方。
        int K = 10;
    
        std::vector<int> pointIdxNKNSearch;
        std::vector<float> pointNKNSquaredDistance;
    
        std::cout << "K nearest neighbor search at (" << searchPoint.x
                  << " " << searchPoint.y
                  << " " << searchPoint.z
                  << ") with K=" << K << std::endl;
    
        if (octree.nearestKSearch(searchPoint, K, pointIdxNKNSearch, pointNKNSquaredDistance) > 0) {
            for (size_t i = 0; i < pointIdxNKNSearch.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxNKNSearch[i]].x
                          << " " << cloud->points[pointIdxNKNSearch[i]].y
                          << " " << cloud->points[pointIdxNKNSearch[i]].z
                          << " (squared distance: " << pointNKNSquaredDistance[i] << ")" << std::endl;
        }
    
       //显示
        pcl::visualization::PCLVisualizer viewer("PCL Viewer");
        viewer.setBackgroundColor(0.0, 0.0, 0.5);
        viewer.addPointCloud<pcl::PointXYZ>(cloud, "cloud");
    
        pcl::PointXYZ originPoint(0.0, 0.0, 0.0);
        // 添加从原点到搜索点的线段
        viewer.addLine(originPoint, searchPoint);
        // 添加一个放到200倍后的坐标系
        viewer.addCoordinateSystem(200);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
        }

cpp\_pcl\_octree八叉树搜索\_radiusSearch半径内近邻搜索

//    float resolution = 0.01f;
        // 设置分辨率为128
        float resolution = 128.0f;
        // resolution该参数描述了octree叶子leaf节点的最小体素尺寸。
        pcl::octree::OctreePointCloudSearch<pcl::PointXYZ> octree(resolution);
        // 设置输入点云
        octree.setInputCloud(cloud);
        // 通过点云构建octree
        octree.addPointsFromInputCloud();
    
        pcl::PointXYZ searchPoint;
    
        searchPoint.x = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.y = 1024.0f * rand() / (RAND_MAX + 1.0f);
        searchPoint.z = 1024.0f * rand() / (RAND_MAX + 1.0f);
     // Neighbors within radius search
        // 方式三：半径内近邻搜索
        // “半径内近邻搜索”原理和“K 近邻搜索”类似,它的搜索结果被写入两个分开的向量中,
        // 这两个向量分别存储结果点的索引和对应的距离平方
        std::vector<int> pointIdxRadiusSearch;
        std::vector<float> pointRadiusSquaredDistance;
    
        float radius = 256.0f * rand() / (RAND_MAX + 1.0f);
    
        std::cout << "Neighbors within radius search at (" << searchPoint.x
                  << " " << searchPoint.y
                  << " " << searchPoint.z
                  << ") with radius=" << radius << std::endl;
    
    
        if (octree.radiusSearch(searchPoint, radius, pointIdxRadiusSearch, pointRadiusSquaredDistance) > 0) {
            for (size_t i = 0; i < pointIdxRadiusSearch.size(); ++i)
                std::cout << "    " << cloud->points[pointIdxRadiusSearch[i]].x
                          << " " << cloud->points[pointIdxRadiusSearch[i]].y
                          << " " << cloud->points[pointIdxRadiusSearch[i]].z
                          << " (squared distance: " << pointRadiusSquaredDistance[i] << ")" << std::endl;
        }
    
        pcl::visualization::PCLVisualizer viewer("PCL Viewer");
        viewer.setBackgroundColor(0.0, 0.0, 0.5);
        viewer.addPointCloud<pcl::PointXYZ>(cloud, "cloud");
    
        pcl::PointXYZ originPoint(0.0, 0.0, 0.0);
        // 添加从原点到搜索点的线段
        viewer.addLine(originPoint, searchPoint);
        // 添加一个放到200倍后的坐标系
        viewer.addCoordinateSystem(200);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
        }

cpp\_pcl\_CloudViewer显示

pcl::visualization::CloudViewer viewer("clound viewer");
        //此代码会阻塞指导渲染完毕
        viewer.showCloud(cloud);
        //死循环判断窗口是否退出 用户按Q
        while (!viewer.wasStopped()){
            //不做任何处理,可以在这里更新点云内容
        }

cpp\_pcl\_CloudViewer显示\_给点云设置个背景色

#include <iostream>
    #include <pcl/io/io.h>
    #include <pcl/io/pcd_io.h>
    #include <pcl/visualization/cloud_viewer.h>
     
    void viewerOnce(pcl::visualization::PCLVisualizer &visualizer){
    
        // 给点云设置个背景色
        visualizer.setBackgroundColor(1.0, 0.5, 1.0);
    
        pcl::PointXYZ center;
        center.x = 1.0;
        center.y = 1.0;
        center.z = 0;
    
        visualizer.addSphere(center, 0.25, "sphere", 0);
        std::cout << "viewer Once" << std::endl;
    
    };
    
    int counter = 0;
    int user_counter = 0;
    void viewerPsycho(pcl::visualization::PCLVisualizer &visualizer){
    
        // 先将之前添加的移除掉
        visualizer.removeShape("text_str", 0);
    
        stringstream ss;
        ss << "Per viewer loop: " << counter++;
        visualizer.addText(ss.str(), 100, 300, 22, 1.0,1.0,1.0, "text_str", 0);
    
    
        std::cout << "viewer Psycho: c->" << counter << " uc->" << user_counter << std::endl;
    };
    
    
    
    
      // 可视化展示
        pcl::visualization::CloudViewer viewer("cloudViewer");
    
        viewer.showCloud(cloud);
    
        // 1. 在首次渲染时候执行操作（添加球体）
        viewer.runOnVisualizationThreadOnce(viewerOnce);
    
        // 2. 在每次更新渲染时候执行操作（添加文字）
        viewer.runOnVisualizationThread(viewerPsycho);
    
        while (!viewer.wasStopped()) {
            // 可以在此处更新点云
            user_counter++;
        }

cpp\_pcl\_PCLVisualizer\_viewer显示

#include <pcl/io/io.h>
    #include <pcl/io/pcd_io.h>
    #include <pcl/visualization/pcl_visualizer.h>
    
    
        pcl::visualization::PCLVisualizer::Ptr viewer(new pcl::visualization::PCLVisualizer("3D_Viewer"));
    
        viewer->setBackgroundColor(0.05, 0.05, 0.05, 0);
    
        // 给点云设置个纯色
        pcl::visualization::PointCloudColorHandlerCustom<pcl::PointXYZ> single_color(cloud, 255, 255, 0);
        viewer->addPointCloud<pcl::PointXYZ>(cloud, single_color, "sample_cloud");
        viewer->setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 2, "sample_cloud");
    
        viewer->addPointCloud<pcl::PointXYZRGBA>(cloud_milk, "sample_color_cloud");
        viewer->setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 3, "sample_color_cloud");
    
        // 添加一个坐标系
        viewer->addCoordinateSystem(0.5);
    
        while (!viewer->wasStopped()) {
            // 每次循环手动调用渲染函数
            viewer->spinOnce();
        }

cpp\_opencv\_threshold二值化

threshold(src,src1,0,255,THRESH_BINARY|THRESH_OTSU);//自动OTSU阈值threshold(tg, t2, 0, 255, THRESH_OTSU|tyv);

cpp\_opencv\_inpaint图片修复\_main

#include <opencv2/opencv.hpp>
    #include <iostream>
    
    using namespace cv;
    using namespace std;
    /**
     *
     * @return
     */
    Mat src = imread("../img/itheima_inpaint.jpg");
    Mat inpaintMask = Mat::zeros(src.rows,src.cols,CV_8UC1);
    void onMouse(int event, int x, int y, int flags, void* userdata){
    
        // 当用户按着左键进行滑动的时候。 绘制修复路径
        if(event == EVENT_MOUSEMOVE && (flags == EVENT_FLAG_LBUTTON)){
            cout<<"按着左键滑动：x="<<x<<"  y="<<y<<endl;
            circle(inpaintMask,Point(x,y),5,Scalar(255),-1);
            imshow("inpaintMask",inpaintMask);
    
    
        }else if(event == EVENT_LBUTTONUP){
            cout<<"左键抬起"<<endl;
            double radius = 5;
            Mat dst;
            inpaint(src,inpaintMask,src,radius,INPAINT_TELEA);
            imshow("src",src);
        }
    }
    
    
    int main(){
    
    
    
    
        imshow("src",src);
        setMouseCallback("src",onMouse);
    
    
    
        waitKey();
        return 0;
    }

cpp\_pcl\_PassThrough直通滤波

#include <pcl/filters/passthrough.h>
    
     pcl::PointCloud<pcl::PointXYZ>::Ptr cloud_filterd(new pcl::PointCloud<pcl::PointXYZ>);//存放过滤后的点云
    
        // 创建滤波器对象
        pcl::PassThrough<pcl::PointXYZ> pass;
        pass.setInputCloud(cloud); //加载原点云
        pass.setFilterFieldName("z");   // 要过滤的字段
        pass.setFilterLimits(0.0, 1.0); // 设置保留范围
    //    pass.setFilterLimitsNegative(true); // 默认false，如果true，
    保留Limits范围之外内容
        pass.filter(*cloud_filterd);    // 执行过滤，并把结果放到cloud_filterd
    
        std::cout << "过滤后留下的点------------------------" << std::endl;
        for (int i = 0; i < cloud_filterd->points.size(); ++i) {
    //打印
            printf("(%f, %f, %f)\n", cloud_filterd->points[i].x, cloud_filterd->points[i].y, cloud_filterd->points[i].z);
        }
    
        pcl::visualization::CloudViewer viewer("cloud_viewer");
        viewer.showCloud(cloud_filterd);
    
        while (!viewer.wasStopped()) {
    
        }

cpp\_pcl\_VoxelGrid 降采样

pcl::PCLPointCloud2::Ptr cloud(new pcl::PCLPointCloud2);
        pcl::PCLPointCloud2::Ptr cloud_filterd(new pcl::PCLPointCloud2);
    
    //    pcl::io::loadPCDFile("./data/table_scene_lms400.pcd", *cloud);
        pcl::PCDReader reader;
        reader.read("./data/table_scene_lms400.pcd", *cloud);
    
        std::cout << "过滤前的点个数：" << cloud->width * cloud->height << std::endl;
        std::cout << "数据类型：" << pcl::getFieldsList(*cloud)<< std::endl;
    
        float leafSize = 0.01f;
        // 执行降采样------------------------
        pcl::VoxelGrid<pcl::PCLPointCloud2> voxel;
        // 设置输入点云
        voxel.setInputCloud(cloud);
        // 设置体素网格的大小
        voxel.setLeafSize(leafSize, leafSize, leafSize);
        // 执行滤波, 并将结果保存到cloud_filterd
        voxel.filter(*cloud_filterd);
    
        std::cout << "---------------------------------------------" << std::endl;
        std::cout << "过滤后的点个数：" << cloud_filterd->width * cloud_filterd->height << std::endl;
        std::cout << "数据类型：" << pcl::getFieldsList(*cloud_filterd)<< std::endl;
    
        pcl::PCDWriter writer;
        writer.write("./data/table_scene_lms400_downsample.pcd", *cloud_filterd);

cpp\_pcl\_StatisticalOutlierRemoval离群点移除过滤器

#include <iostream>
    #include <pcl/point_cloud.h>
    #include <pcl/io/io.h>
    #include <pcl/io/pcd_io.h>
    #include <pcl/filters/statistical_outlier_removal.h>
    
    typedef pcl::PointXYZ PointT;
    typedef pcl::PointCloud<pcl::PointXYZ> PointCloud;
    
    using namespace std;
    
    /**
     *
     */
    int main(int argc, char *argv[]) {
    
    
        PointCloud::Ptr cloud(new PointCloud);
        PointCloud::Ptr cloud_filtered(new PointCloud);
    
        pcl::PCDReader reader;
        reader.read<PointT>("./data/table_scene_lms400_downsample.pcd", *cloud);
    
        // 创建统计学离群点移除过滤器
        pcl::StatisticalOutlierRemoval<PointT> sor;
        sor.setInputCloud(cloud);
        // 设置过滤邻域K
        sor.setMeanK(50);
        // 设置标准差的系数, 值越大，丢掉的点越少
        sor.setStddevMulThresh(1.0f);
        sor.filter(*cloud_filtered);
    
        // 保存去掉离群点之后的点云
        pcl::PCDWriter writer;
        writer.write("./data/table_scene_lms400_inliers.pcd", *cloud_filtered);
    
        // 取反
        sor.setNegative(true);
        sor.filter(*cloud_filtered);
        // 保存被去掉离群点
        writer.write("./data/table_scene_lms400_outliers.pcd", *cloud_filtered);
    
    
    }

## ##

cpp\_pcl\_ConditionalRemoval条件滤波

#include <pcl/filters/radius_outlier_removal.h>
    #include <pcl/filters/conditional_removal.h>
    
     pcl::PointCloud<pcl::PointXYZ>::Ptr cloud_filtered(new pcl::PointCloud<pcl::PointXYZ>);
     
     // 条件滤波
            // 创建条件对象 0.0 < z <= 0.8 || x > 0
            pcl::ConditionAnd<PointType>::Ptr range_cond(new pcl::ConditionAnd<PointType>);
    
            // 添加比较对象 z > 0.0
            range_cond->addComparison(pcl::FieldComparison<PointType>::ConstPtr(new pcl::FieldComparison<PointType>(
                    "z", pcl::ComparisonOps::GT, 0.0)));
            // 添加比较对象 z <= 0.8
            range_cond->addComparison(pcl::FieldComparison<PointType>::ConstPtr(new pcl::FieldComparison<PointType>(
                    "z", pcl::ComparisonOps::LE, 0.8)));
    
            pcl::ConditionalRemoval<PointType> condRem;
            condRem.setInputCloud(cloud);
            // 设置过滤条件
            condRem.setCondition(range_cond);
    
            // false默认值：将条件之外的点移除掉
            // true：将条件之外的点还保留，但是设置NAN, 或者setUserFilterValue修改
            condRem.setKeepOrganized(false);
            condRem.filter(*cloud_filtered);
    
      pcl::visualization::PointCloudColorHandlerCustom<PointType> cloud_filtered_color(cloud, 255, 0, 0);
        viewer.addPointCloud(cloud_filtered, cloud_filtered_color, "cloud_filtered");
        viewer.setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 4, "cloud_filtered");
    
        viewer.addCoordinateSystem(1.0);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
        }

cpp\_pcl\_RadiusOutlierRemoval半径滤波

#include <pcl/filters/radius_outlier_removal.h>
    #include <pcl/filters/conditional_removal.h>
    
    pcl::PointCloud<pcl::PointXYZ>::Ptr cloud_filtered(new pcl::PointCloud<pcl::PointXYZ>);
    
    // 通过半径滤波执行, 如果一个点在指定半径内，有指定个数的邻居，则保留
            pcl::RadiusOutlierRemoval<PointType> outlierRemoval;
            outlierRemoval.setInputCloud(cloud);
    
            // 设置搜索半径
            outlierRemoval.setRadiusSearch(0.4);
            // 邻居个数
            outlierRemoval.setMinNeighborsInRadius(2);
    
            outlierRemoval.filter(*cloud_filtered);
    
     pcl::visualization::PointCloudColorHandlerCustom<PointType> cloud_filtered_color(cloud, 255, 0, 0);
        viewer.addPointCloud(cloud_filtered, cloud_filtered_color, "cloud_filtered");
        viewer.setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 4, "cloud_filtered");
    
        viewer.addCoordinateSystem(1.0);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
        }

cpp\_h弧度角度互转

float DE2RA = M_PI / 180.0f;
        float RA2DE = 180.0f / M_PI;
        // angular_resolution： 扫描的分辨率，1° -> 弧度。
        float angular_resolution =  DEG2RAD(1.0f); // degrees to radians
        // max_angle_width 水平方向扫描的范围 360° -> 弧度
        float max_angle_width = 360.0f * DE2RA;
        // max_angle_height 竖直方向扫描范围 180° -> 弧度
        float max_angle_height = 180.0f * DE2RA;

cpp\_pcl\_通过点云生成深度图\_main

#include <iostream>
    #include <pcl/io/io.h>
    #include <pcl/range_image/range_image.h>
    #include <pcl/visualization/pcl_visualizer.h>
    #include <pcl/io/pcd_io.h>
    
    using namespace std;
    
    /**
     * 通过点云生成深度图
     */
    int main(int argc, char *argv[]) {
    
    
        pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
        pcl::PointCloud<pcl::PointXYZ> &pointCloud = *cloud;
    
        // 添加一个正方形区域 -0.5 -> 0.5
        for (float y = -0.5f; y <= 0.5f; y += 0.01f) {
            for (float z = -0.5f; z <= 0.5f; z += 0.01f) {
                pcl::PointXYZ point;
                point.x = 2.0f - y;
                point.y = y;
                point.z = z;
                pointCloud.points.push_back(point);
            }
        }
        uint32_t size = pointCloud.points.size();
        pointCloud.width = size;
        pointCloud.height = 1;
    
    //    pcl::io::loadPCDFile("./data/table_scene_lms400_downsample.pcd", pointCloud);
    
    
        float DE2RA = M_PI / 180.0f;
        float RA2DE = 180.0f / M_PI;
    //    * \param angular_resolution the angular difference (in radians) between the individual pixels in the image
        // angular_resolution： 扫描的分辨率，1° -> 弧度。
        float angular_resolution =  DEG2RAD(1.0f); // degrees to radians
    
    //    * \param max_angle_width an angle (in radians) defining the horizontal bounds of the sensor
        // max_angle_width 水平方向扫描的范围 360° -> 弧度
        float max_angle_width = 360.0f * DE2RA;
    
    //    * \param max_angle_height an angle (in radians) defining the vertical bounds of the sensor
        // max_angle_height 竖直方向扫描范围 180° -> 弧度
        float max_angle_height = 180.0f * DE2RA;
    
    //    * \param sensor_pose an affine matrix defining the pose of the sensor (defaults to
    //    *                    Eigen::Affine3f::Identity () )
        Eigen::Affine3f sensorPose = (Eigen::Affine3f)Eigen::Translation3f(0.0f, -3.0f, 0.0f);
    
    //    * \param coordinate_frame the coordinate frame (defaults to CAMERA_FRAME)
        pcl::RangeImage::CoordinateFrame coordinateFrame = pcl::RangeImage::CAMERA_FRAME;
    
    //    * \param noise_level - The distance in meters inside of which the z-buffer will not use the minimum,
    //    *                      but the mean of the points. If 0.0 it is equivalent to a normal z-buffer and will always take the minimum per cell.
        float noise_level = 0.0f;
    
        float minRange = 0.0f;
    //    * \param border_size the border size (defaults to 0)
        float border_size = 0.0f;
        // 从点云图生成深度图
        pcl::RangeImage::Ptr rangeImagePtr(new pcl::RangeImage);
        pcl::RangeImage &rangeImage = *rangeImagePtr;
    
        rangeImage.createFromPointCloud(pointCloud, angular_resolution, max_angle_width, max_angle_height, sensorPose,
            coordinateFrame, noise_level, minRange, border_size
        );
    
        pcl::visualization::PCLVisualizer viewer("3dViewer");
        viewer.setBackgroundColor(1.0, 1.0, 1.0);
    
        // 添加的原始点云
        pcl::visualization::PointCloudColorHandlerCustom<pcl::PointXYZ> single_color(cloud, 255, 100, 0);
        viewer.addPointCloud<pcl::PointXYZ>(cloud, single_color, "sample_cloud");
        viewer.setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 2, "sample_cloud");
    
        // 添加深度图
        pcl::visualization::PointCloudColorHandlerCustom<pcl::PointWithRange> range_color(rangeImagePtr, 0, 0, 0);
        viewer.addPointCloud(rangeImagePtr, range_color, "range_image");
        viewer.setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 4, "range_image");
    
        viewer.addCoordinateSystem(1.0);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
            pcl_sleep(0.01);
        }
    
    
    }

cpp\_pcl\_SampleConsensusModelPlane\_SampleConsensusModelSphere查找创建包含外部点的平面及球体\_main

#include <iostream>
    #include <thread>
    
    #include <pcl/console/parse.h>
    #include <pcl/filters/extract_indices.h>
    #include <pcl/io/pcd_io.h>
    #include <pcl/point_types.h>
    #include <pcl/sample_consensus/ransac.h>
    #include <pcl/sample_consensus/sac_model_plane.h>
    #include <pcl/sample_consensus/sac_model_sphere.h>
    #include <pcl/visualization/pcl_visualizer.h>
    
    using namespace std;
    
    
    
     /**
     * 使用方法：
     *
     * random_sample_consensus     创建包含外部点的平面
     * random_sample_consensus -f  创建包含外部点的平面，并计算平面内部点
     *
     * random_sample_consensus -s  创建包含外部点的球体
     * random_sample_consensus -sf 创建包含外部点的球体，并计算球体内部点
     */
    
        pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
        pcl::PointCloud<pcl::PointXYZ>::Ptr inliers_cloud(new pcl::PointCloud<pcl::PointXYZ>);
    
        // 根据参数生成点云数据
    
        cloud->width = 500;
        cloud->height = 1;
        cloud->points.resize(cloud->width * cloud->height);
    
        bool isSphere = pcl::console::find_argument(argc, argv, "-s") >= 0 || pcl::console::find_argument(argc, argv, "-sf") >= 0;
    
    
        for (int i = 0; i < cloud->points.size(); ++i) {
            cloud->points[i].x = 1024 * rand() / (RAND_MAX + 1.0f);
            cloud->points[i].y = 1024 * rand() / (RAND_MAX + 1.0f);
            if (isSphere) {
                // -s 生成包含外部点球体
                if (i % 5 == 0) {
                    cloud->points[i].z = 1024 * rand() / (RAND_MAX + 1.0f);
                } else if (i % 2 == 0) {
                    cloud->points[i].z =  sqrt(1 - (pow(cloud->points[i].x, 2) + pow(cloud->points[i].y, 2)));
                } else {
                    cloud->points[i].z = -sqrt(1 - (pow(cloud->points[i].x, 2) + pow(cloud->points[i].y, 2)));
                }
    
            }else {
                // 生成包含外部点平面 -1.0 -> 1.0
                if (i % 2 == 0) {
                    cloud->points[i].z = 1024 * rand() / (RAND_MAX + 1.0f);
                }else {
                    cloud->points[i].z = -1.0f * (cloud->points[i].x + cloud->points[i].y);
                }
            }
        }
    
        bool isRansac = pcl::console::find_argument(argc, argv, "-f") >= 0 || pcl::console::find_argument(argc, argv, "-sf") >= 0;
    
    
    
     if (isRansac) {
    
            pcl::SampleConsensusModelPlane<pcl::PointXYZ>::Ptr model_p(
                    new pcl::SampleConsensusModelPlane<pcl::PointXYZ>(cloud));
    
    
            pcl::SampleConsensusModelSphere<pcl::PointXYZ>::Ptr model_s(
                    new pcl::SampleConsensusModelSphere<pcl::PointXYZ>(cloud));
    
            // 用于接收所有内部点的索引
            std::vector<int> inliers;
    
            // 根据模型迭代拟合出平面模型参数，并获取符合其模型参数的内部点
            pcl::SampleConsensusModel<pcl::PointXYZ>::Ptr model_arg = model_p;
            if (isSphere) {
                // 根据模型迭代拟合出球体模型参数，并获取符合其模型参数的内部点
                model_arg = model_s;
    
            }
            pcl::RandomSampleConsensus<pcl::PointXYZ> ransac(model_arg);
            // 阈值 1cm
            ransac.setDistanceThreshold(0.01f);
            // 执行计算
            ransac.computeModel();
            // 获取内点
            ransac.getInliers(inliers);
    
    
            // 根据索引列表拷贝点云
            pcl::copyPointCloud(*cloud, inliers, *inliers_cloud);
        }

cpp\_pcl\_生成包含外部点球体

for (int i = 0; i < cloud->points.size(); ++i) {
            cloud->points[i].x = 1024 * rand() / (RAND_MAX + 1.0f);
            cloud->points[i].y = 1024 * rand() / (RAND_MAX + 1.0f);
            // -s 生成包含外部点球体  圆的算法 1=z平方 + x 平方 + y平方;  z平方=z1 - (x 平方 + y平方)
                if (i % 5 == 0) {
                    cloud->points[i].z = 1024 * rand() / (RAND_MAX + 1.0f);
                } else if (i % 2 == 0) {
                    cloud->points[i].z =  sqrt(1 - (pow(cloud->points[i].x, 2) + pow(cloud->points[i].y, 2)));
                } else {
                    cloud->points[i].z = -sqrt(1 - (pow(cloud->points[i].x, 2) + pow(cloud->points[i].y, 2)));
                }
    
           
            }
        }

cpp\_pcl\_生成包含外部点平面

for (int i = 0; i < cloud->points.size(); ++i) {
            cloud->points[i].x = 1024 * rand() / (RAND_MAX + 1.0f);
            cloud->points[i].y = 1024 * rand() / (RAND_MAX + 1.0f);
                // 生成包含外部点平面 -1.0 -> 1.0
                if (i % 2 == 0) {
                    cloud->points[i].z = 1024 * rand() / (RAND_MAX + 1.0f);
                }else {
                    cloud->points[i].z = -1.0f * (cloud->points[i].x + cloud->points[i].y);
             
            }
        }

cpp\_pcl\_ConditionAnd\_or创建比较起0.0 < z <= 0.8 || x > 0

// 条件滤波
            // 创建条件对象 0.0 < z <= 0.8 || x > 0
            pcl::ConditionAnd<PointType>::Ptr range_cond(new pcl::ConditionAnd<PointType>);
    
            // 添加比较对象 z > 0.0
            range_cond->addComparison(pcl::FieldComparison<PointType>::ConstPtr(new pcl::FieldComparison<PointType>(
                    "z", pcl::ComparisonOps::GT, 0.0)));
            // 添加比较对象 z <= 0.8
            range_cond->addComparison(pcl::FieldComparison<PointType>::ConstPtr(new pcl::FieldComparison<PointType>(
                    "z", pcl::ComparisonOps::LE, 0.8)));

cpp\_pcl\_NormalEstimation计算点云法向量\_main

#include <iostream>
    #include <pcl/io/io.h>
    #include <pcl/features/normal_3d.h>
    #include <pcl/io/pcd_io.h>
    #include <pcl/visualization/cloud_viewer.h>
    #include <thread>
    
    using namespace std;
    
    /**
     * 评估点云法向量
     *
     * NormalEstimation
     *
     * setInputCloud
     *
     * setIndices
     *
     * setSearchSurface
     */
    int main(int argc, char *argv[]) {
      char *arg = argv[1];
        if (!argv[1]) {
            arg = "./data/bunny.pcd";
        }
        pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
        pcl::io::loadPCDFile(arg, *cloud);
    
        // 创建法线集合
        pcl::PointCloud<pcl::Normal>::Ptr normals(new pcl::PointCloud<pcl::Normal>);
    
        // 计算点云法向量
        pcl::NormalEstimation<pcl::PointXYZ, pcl::Normal> normalEstimation;
    
        // 设置输入点云
        normalEstimation.setInputCloud(cloud);
    
        // 设置搜索半径, 对于每个点，通过其周围半径3cm以内的邻居计算法线
        normalEstimation.setRadiusSearch(0.03);
    //    normalEstimation.setIndices()
    //    normalEstimation.setSearchSurface()
    
        pcl::search::KdTree<pcl::PointXYZ>::Ptr kdtree(new pcl::search::KdTree<pcl::PointXYZ>());
        // 设置搜索方法
        normalEstimation.setSearchMethod(kdtree);
    
        // 估算法线
        normalEstimation.compute(*normals);
    
        pcl::visualization::PCLVisualizer viewer("PCLViewer");
    
        viewer.addPointCloud(cloud, "cloud");
    
        // 每几个点绘制一个法向量
        int level = 1;
        float scale = 0.01;
        viewer.addPointCloudNormals<pcl::PointXYZ, pcl::Normal>(cloud, normals, level, scale, "normal_cloud");
    
        viewer.addCoordinateSystem(0.01);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
            std::this_thread::sleep_for(100ms);
        }
    
        return 0;
    
    }

cpp\_pcl\_NormalEstimation子集中进行表面法线估算\_main

cpp\_pcl\_NormalEstimation降采样版本法线估算\_main

//
    // Created by sk on 2020/8/5.
    //
    
    
    #include <iostream>
    #include <pcl/io/io.h>
    #include <pcl/features/normal_3d.h>
    #include <pcl/io/pcd_io.h>
    #include <pcl/filters/voxel_grid.h>
    #include <pcl/visualization/cloud_viewer.h>
    #include <thread>
    
    using namespace std;
    
    /**
     * 评估点云法向量
     *
     * NormalEstimation
     *
     * setInputCloud
     *
     * setIndices
     *
     * setSearchSurface
     */
    int main(int argc, char *argv[]) {
    
        char *arg = argv[1];
        if (!argv[1]) {
            arg = "./data/bunny.pcd";
        }
        pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
        pcl::PointCloud<pcl::PointXYZ>::Ptr cloud_downsampled(new pcl::PointCloud<pcl::PointXYZ>);
        pcl::io::loadPCDFile(arg, *cloud);
    
        // 创建法线集合
        pcl::PointCloud<pcl::Normal>::Ptr normals(new pcl::PointCloud<pcl::Normal>);
    
        // 降采样原始点云
        pcl::VoxelGrid<pcl::PointXYZ> voxel;
        voxel.setInputCloud(cloud);
        voxel.setLeafSize(0.03f, 0.03f, 0.03f );
        voxel.filter(*cloud_downsampled);
        // 计算点云法向量
        pcl::NormalEstimation<pcl::PointXYZ, pcl::Normal> normalEstimation;
        // 设置输入点云
        normalEstimation.setInputCloud(cloud_downsampled);
        // 设置搜索半径, 对于每个点，通过其周围半径3cm以内的邻居计算法线
        normalEstimation.setRadiusSearch(0.03);
    
    //    normalEstimation.setViewPoint()
    
    //    normalEstimation.setIndices(indicesPtr);
        normalEstimation.setSearchSurface(cloud);
    
        pcl::search::KdTree<pcl::PointXYZ>::Ptr kdtree(new pcl::search::KdTree<pcl::PointXYZ>());
        // 设置搜索方法
        normalEstimation.setSearchMethod(kdtree);
    
        // 估算法线
        normalEstimation.compute(*normals);
    
        pcl::visualization::PCLVisualizer viewer("PCLViewer");
    
        viewer.addPointCloud(cloud, "cloud");
    
        // 这里的点云数量必须和法线数量一致 ------------------------------------ !
        // 每几个点绘制一个法向量
        int level = 1;
        float scale = 0.02;
        viewer.addPointCloudNormals<pcl::PointXYZ, pcl::Normal>(cloud_downsampled, normals, level, scale, "normal_cloud");
    
        // 所有原始点
        viewer.addPointCloud<pcl::PointXYZ>(cloud, "cloud");
        viewer.setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 1, "cloud");
    
        // 降采样后的点
        pcl::visualization::PointCloudColorHandlerCustom<pcl::PointXYZ> single_color(cloud, 0, 255, 0);
        viewer.addPointCloud<pcl::PointXYZ>(cloud_downsampled, single_color, "cloud_downsampled");
        viewer.setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 3, "cloud_downsampled");
    
        viewer.addCoordinateSystem(0.01);
    
        while (!viewer.wasStopped()) {
            viewer.spinOnce();
            std::this_thread::sleep_for(100ms);
        }
    
        return 0;
    
    }

[https_mathpix.com]: https://mathpix.com/
[http_webdemo.myscript.com]: http://webdemo.myscript.com
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[20200726190808298.png]: https://img-blog.csdnimg.cn/20200726190808298.png
[20200726190740840.png]: https://img-blog.csdnimg.cn/20200726190740840.png
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[Link 1]: http://robot.czxy.com/docs/ros/hello/pkgpy/#clionpython
[Link 2]: http://robot.czxy.com/docs/ros/hello/pkgpy/#1-scripts
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[Link 3]: http://robot.czxy.com/docs/ros/hello/pkgpy/#2python
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[Link 4]: http://robot.czxy.com/docs/ros/turtle/cppimpl/#qt
[Link 5]: http://robot.czxy.com/docs/ros/turtle/cppimpl/#1-c-11
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[Link 6]: http://robot.czxy.com/docs/ros/turtle/cppimpl/#2-qt
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[Link 7]: http://robot.czxy.com/docs/ros/turtle/cppimpl/#2-cmake
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[20200726192629466.png]: https://img-blog.csdnimg.cn/20200726192629466.png
[http_robot.czxy.com_car]: http://robot.czxy.com/car/
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[20200717210025693.png]: https://img-blog.csdnimg.cn/20200717210025693.png
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