C++ 在另一个 ROI 内复制一个 cv::Mat
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Copy an cv::Mat inside a ROI of another one
提问by theosem
I need to copy a cv::Matimage (source) to an ROI of another (Destination) cv::Matimage.
我需要将cv::Mat图像（源）复制到另一个（目标）cv::Mat图像的 ROI 。
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?
我找到了这个参考，但它似乎不适用于我的情况。你有什么指示我怎么能用 OpenCV C++ 接口做到这一点？
回答by Andrey Kamaev
OpenCV 2.4:
OpenCV 2.4：
src.copyTo(dst(Rect(left, top, src.cols, src.rows)));
OpenCV 2.x:
OpenCV 2.x：
Mat dst_roi = dst(Rect(left, top, src.cols, src.rows));
src.copyTo(dst_roi);
回答by Mich
In addition or correction to above answers, if you want to copy a smaller region of open Matto another Mat, you should do:
除了或更正上述答案之外，如果您想将 open 的较小区域复制Mat到另一个区域Mat，您应该这样做：
src(Rect(left,top,width, height)).copyTo(dst);
回答by Renato Aloi
Did work for me this way:
这样做对我有用：
Mat imgPanel(100, 250, CV_8UC1, Scalar(0));
Mat imgPanelRoi(imgPanel, Rect(0, 0, imgSrc.cols, imgSrc.rows));
imgSrc.copyTo(imgPanelRoi);
imshow("imgPanel", imgPanel);
waitKey();
I am using Opencv 2.4.9 Based on Andrey's answer.
我正在使用 Opencv 2.4.9 基于安德烈的回答。
