QT + opencv 配置opencv环境

阳光穿透心脏的1/2处 2023-03-03 12:26 26阅读 0赞

# Ubuntu16.04+QT下的OpenCV配置过程 #

# 一、opencv编译及安装 #

## 1.安装依赖包 ##

sudo apt-get install build-essential
    sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
    sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev

## 2.获取OpenCV源码 ##

[github地址][github]

[官网地址][Link 1]

除Windows以外，其他的系统都需要手动源码编译。

## 3.编译OpenCV源码 ##

解压压缩包到~/opencv文件夹  
进入安装目录执行如下命令

cd ~/opencv
    mkdir release
    cd release
    cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..

--------------------

(cmake时可能出现提示安装Qt的情况)  
安装Qt 1.[下载合适的qt版本 下载地址][qt_]  
2.假定下载为目前最新的5.12版本 `qt-opensource-linux-x64-5.12.0.run`

3.下载成功后执行

chmod +x qt-opensource-linux-x64-5.12.0.run
     sudo ./qt-opensource-linux-x64-5.12.0.run

--------------------

进入release目录执行如下命令  
make (完成之后)  
sudo make install

等待编译完成，添加库路径及更新

sudo /bin/bash -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'
    sudo ldconfig

# 二、引入OpenCV #

--------------------

（我用的是opencv3.4.3，其他版本也可用此方法）  
opencv编译后默认是安装在/usr/local/lib下

--------------------

## 在.pro文件添加以下内容即可 ##

###################################对opencv的支持
    INCLUDEPATH += /usr/local/include \
    /usr/local/include/opencv \
    /usr/local/include/opencv2
    
    LIBS += /usr/local/lib/libopencv_calib3d.so \
    /usr/local/lib/libopencv_core.so \
    /usr/local/lib/libopencv_features2d.so \
    /usr/local/lib/libopencv_flann.so \
    /usr/local/lib/libopencv_highgui.so \
    /usr/local/lib/libopencv_imgcodecs.so \
    /usr/local/lib/libopencv_imgproc.so \
    /usr/local/lib/libopencv_ml.so \
    /usr/local/lib/libopencv_objdetect.so \
    /usr/local/lib/libopencv_photo.so \
    /usr/local/lib/libopencv_shape.so \
    /usr/local/lib/libopencv_stitching.so \
    /usr/local/lib/libopencv_superres.so \
    /usr/local/lib/libopencv_videoio.so \
    /usr/local/lib/libopencv_video.so \
    /usr/local/lib/libopencv_videostab.so
    ###################################

## 测试 ##

新建工程，将main.cpp改为以下例程：

#include <opencv2/highgui/highgui.hpp>
    #include <opencv2/core/core.hpp>
    #include <opencv2/opencv.hpp>
    
    using namespace cv;
    int main()
    {
        VideoCapture cap(0);
        while(1)
        {
            Mat img;
            cap >> img;
            imshow("camera",img);
            if(waitKey(30)==27)//按下Esc退出
                return 0;
        }
    }

若遇到找不到 或者不能打开`libopencv_core.so.3.4` 的情况

输入命令

sudo gedit /etc/ld.so.conf

在末尾加入/usr/local/lib  
Ctrl+S保存，Ctr+x退出gedit编辑器

记得 `ldconfig` 一下

sudo ldconfig

若遇到 不能加载 `canberra-gtk-module` 下载即可

sudo apt-get install libcanberra-gtk-module

[github]: https://github.com/opencv/opencv
[Link 1]: http://opencv.org/downloads.html
[qt_]: http://download.qt.io/archive/qt/