OpenCV下载、环境变量配置

https://sourceforge.net/projects/opencvlibrary/files/

D:\opencv\31\opencv\build\x64\vc14\bin

 
#include<opencv2/opencv.hpp>
#include <iostream>
using namespace cv;
int main()
{
   
    Mat src = imread("D:/Snipaste_2023-06-26_08-30-27.png");
    if (src.empty()) {
        printf("could not load image....\n");
    }
    namedWindow("test opencv stup", CV_WINDOW_AUTOSIZE);
    imshow("test Opencv stup", src);
    waitKey(0);
    return 0;
 
}