（5）定义感兴趣区域

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#include<opencv2/opencv.hpp>
using namespace cv;


int main() {
Mat image = imread("puppy.bmp");
Mat logo = imread("smalllogo.png");
Mat imageROI(image,
Rect(image.cols - logo.cols, //ROI coordinates
image.rows - logo.rows,
logo.cols, logo.rows));// ROI size
logo.copyTo(imageROI);
imshow("New Image", image);
waitKey(0);



return 0;
}