[英]opencv how to visualize a non-rectangular region (roi) in a performant way
[英]Blurring non-rectangular region of an image, then downsample whole image - OpenCV
棘手的方式:
cv::Mat roi;
cv::blur(image & mask,roi,cv::Size(3,3));//Or whatever blurring you want
cv::Mat Result=(image & (~mask)) + roi;
cv::resize(result,result,cv::Size(New_Width,New_height)); // Or whatever downsampling you want
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