imageName = argv[1]; Mat image = imread(samples::findFile(imageName), IMREAD_COLOR); // Read the file if (image.empty()) { // Check for invalid input cout << "Could not open or find the image" << endl; return -1; namedWindow("Display window", WINDOW_AUTOSIZE); // Create a window for display. imshow("Display window", image); // Show our image inside it. waitKey(0); // Wait for a keystroke in the window return 0; 在工程的根目录下放置测试图片 “HappyFish.jpg”