2013-09-19 15:51:39 -0600 | asked a question | opencv cature video roi Want to capture upper left corner of frame from USB Webcam, whitout first have to capture entire frame. How can I do? using namespace cv; int main() { Mat image; Mat image2; VideoCapture cap; cap.open(0); namedWindow("window", CV_WINDOW_AUTOSIZE); while(1) { // This do not work cap>>image2(Rect(0,0,10,20)); // This works cap>>image; waitKey(10); } return 0; } |