Read Image
Mat color= imread(“../lena.jpg”);
Mat gray= imread(“../lena.jpg”, 0);
Write Image
imwrite(“lenaGray.jpg”, gray);
Show Image
imshow(“Lena Gray”, gray);
Read VideoFile/Camera
VideoCapture cap;
cap.open(videoFile);
cap.open(0);//default camera
if(!cap.isOpened()) // check if succeeded
return -1;
cap.release();
Show VideoFile/Camera
namedWindow(“Video”,1);
for(;;)
{
Mat frame;
cap >> frame; // get a new frame from camera
imshow(“Video”, frame);
if(waitKey(30) >= 0) break;
}