Copy an cv::Mat inside a ROI of another one
问题 I need to copy a cv::Mat image (source) to an ROI of another (Destination) cv::Mat image. I found this reference, but it seems that it does not work for my case. Do you have any pointers how could I do this using the OpenCV C++ interface? 回答1: OpenCV 2.4: src.copyTo(dst(Rect(left, top, src.cols, src.rows))); OpenCV 2.x: Mat dst_roi = dst(Rect(left, top, src.cols, src.rows)); src.copyTo(dst_roi); 回答2: In addition or correction to above answers, if you want to copy a smaller region of open Mat