[OpenCV] 4、图像叠加 addWeighted

 1 #include <iostream>
 2 #include <opencv2/highgui/highgui.hpp>
 3 #include <opencv2/core/core.hpp>
 4 
 5 using namespace cv;
 6 using namespace std;
 7 
 8 int main(){
 9     cv::Mat image = cv::imread("fruits.jpg");
10     cv::Mat logo = cv::imread("logo.png");
11     cv::Mat mask = cv::imread("logo.png",0);
12     cv::Mat imageROI;
13     imageROI = image(cv::Rect(10,10,logo.cols,logo.rows));
14     //logo.copyTo(imageROI,mask);//这个函数可以复制图像到另一个图像或矩阵上，可选参数是掩码
15     //void addWeighted(InputArray src1, double alpha, InputArray src2, double beta, double gamma, OutputArray dst, int dtype=-1)
16     //目标像素=src1*alpha+src2*beta
17     cv::addWeighted(imageROI, 1.0, logo, 0.6, 0, imageROI);
18     //cv::namedWindow("result");
19     cv::imshow("result-image",image);
20     cv::imshow("result-mask",mask);
21     cv::waitKey();
22     return 0;
23 }