1 Mat imgMat = imread("swan.jpg", IMREAD_COLOR);
2 // cvtColor(imgMat, imgMat, COLOR_BGR2GRAY); // 转为灰度图
3 Mat m;
4 imgMat(Rect(1200,1200, 1000, 800)).copyTo(m);
5
6 int n = 1000 * 800 * 0.05; // 0.5%白噪点
7
8 for(int k = 0; k < n; k++)
9 {
10 int i = QRandomGenerator::global()->bounded(m.rows);
11 int j = QRandomGenerator::global()->bounded(m.cols);
12
13 if(m.channels() == 1)
14 m.at<uchar>(i, j) = 255;
15 else
16 {
17 m.at<Vec3b>(i, j)[0] = 255;
18 m.at<Vec3b>(i, j)[1] = 255;
19 m.at<Vec3b>(i, j)[2] = 255;
20 }
21 }
22
23 imshow("!", m);
