opencv学习之addWeighted图片打水印 #201906061030

include <opencv2/opencv.hpp>

using namespace cv;
using namespace std;

int main(){
//定义矩阵内存块；
Mat pic, logo_src, logo,pic_roi;

//读入两张图片，底板背景和水印logo_src;
pic = imread("/Users/leung/Desktop/left.jpg");
logo_src = imread("/Users/leung/Desktop/right.jpg");

//对logo_src修改大小；
resize(logo_src, logo, Size(logo_src.cols/2,logo_src.rows/2));

//在原图选择logo的x位置，注意roi一定要和logo大小一致
//roi(起始x，起始y，长，宽)；
Rect roi(50,50,logo.cols,logo.rows);

pic_roi = pic(roi);
//将logo和pic_roi按一定比例融合叠加，
addWeighted(logo, 0.7, pic_roi, 0.8, 0, pic_roi);

imshow("pic_withmix", pic);
waitKey();
return 0;

}