OpenCV取图和显示

1.图像读取

#include<opencv2/opencv.hpp>usingnamespacecv;intmain(){Mat img=imread("test.jpg");// 读取图片if(img.empty()){printf("读取失败\n");return-1;}imshow("Image",img);// 显示图片waitKey(0);// 等待按键destroyAllWindows();// 关闭窗口return0;}

2.从摄像头读取并显示

#include<opencv2/opencv.hpp>usingnamespacecv;intmain(){VideoCapturecap(0);// 打开摄像头if(!cap.isOpened()){return-1;}Mat frame;while(true){cap>>frame;imshow("Camera",frame);if(waitKey(30)==27)break;// 按ESC退出}return0;}