https://blog.csdn.net/weixin_41519463/article/details/86553704 每次都提示找不到文件，肯定是路径错了，根据上面博文的提示，把文件放在项目文件夹中，而不是源码文件夹中 图中的第一个1.png加载不了，在src文件夹下 下面的1.png,路径为String imageName = "src//1.png"; 其余两张，路径为String imageName = "2.jpeg";或String imageName = ".//3.jpg";（.//表示项目目录下的文件夹下）
#include <opencv2/core.hpp> #include <opencv2/imgcodecs.hpp> #include <opencv2/highgui.hpp> #include <iostream> #include <string> using namespace cv; using namespace std; int main(int argc, char** argv) { String imageName = ".//3.jpg"; // by default if (argc > 1) { imageName = argv[1]; cout << "there is a file" << std::endl; } Mat image; image = imread(imageName, IMREAD_COLOR); // Read the file if (image.empty()) // Check for invalid input { cout << "Could not open or find the image" << std::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; }