opencv（Python/c++）:4.ROI（感兴趣区域）及图像混合

青旅半醒 2022-03-25 04:46 295阅读 0赞

ROI为region of interest，即感兴趣区域

**ROI和addWeighted函数结合起来**

先上效果图（将icon 混合到dog图 上）  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc1NTM4NA_size_16_color_FFFFFF_t_70]

#### 1.c++实现部分 ####

#include <iostream>
    #include <opencv2/highgui/highgui.hpp>
    #include <opencv2/core/core.hpp>
    #include <opencv2/opencv.hpp>
    #include <math.h>
    using namespace std;
    using namespace cv;
    // mix fig: extract the ROI of fig1 into fig 2
    int main(int argc, char *argv[])
    {
        Mat image=imread("/home/liuxin/dog.jpeg");
        Mat icon=imread("/home/liuxin/icon.jpeg");
        imshow("original fig ",image);
        //ROI的起点以及icon的大小，方便将icon拷贝到指定位置
        Mat ROIimage=image(Rect(30,40,icon.cols,icon.rows));
        //注意此处的ROI仍在image上
        imshow("ROI image ",ROIimage);
        // depict the rectangle
        //rectangle(image,Rect(0,0,200,200),Scalar(0,255,0),2);// 0,0 it's the point of rectangle.
        //define Mat and restore the ROI of image   (ROI:region of interest)
        //image(Rect(0,0,200,200)).copyTo(ROIimage);//copy
        //1. ROI  specific coordinate and width and height
    
        //imageROI(Range(10,10+image2.rows),Range(100,100+image2.cols));
        //add image2 to image
        //image上被确定的ROIimage不透明为0.1，icon在此处的为0.9.依旧在image上操作
        addWeighted(ROIimage,0.1,icon,0.9,0.,ROIimage);
    
        //display
        imshow("mixed figure ",image);
    
        waitKey();
        return 0;
    
    
    }

#### 2.Python实现部分 ####

待写

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc1NTM4NA_size_16_color_FFFFFF_t_70]: /images/20220325/5680bcf622f54b458c5edf08cd74ecf2.png