opencv旋转摄像头

打开摄像头

VideoCapture capture(cameraID);
if (!capture.isOpened())
{
	return S_FALSE;
}
capture >> frame;
imwrite("src.jpg", frame);

顺时针旋转90°

transpose(frame, frame);
flip(frame, frame, 1);
imwrite("dest1.jpg", frame);

顺时针旋转180°

flip(frame, frame, -1);
imwrite("dest2.jpg", frame);

顺时针旋转270°

transpose(frame, frame);
flip(frame, frame, 0);
imwrite("dest3.jpg", frame);