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Hi,

I am creating smooth mask to merge image and CV_16UC3 solid color image together. I need create gradient for merge image with new background.

cv::Mat imgMask = cv::Mat(imageSize, CV_16UC1, cv::Scalar(65535, 65535, 65535));
cv::ellipse(imgMask, cv::Point(center.x(), center.y()), cv::Size(radiusCol, radiusRow), 0, 360, 0, cv::Scalar(0), -1);
cv::GaussianBlur(imgMask, imgMask, cv::Size(0, 0), feather);

Than I am blending mask and image. Image is 8700 x 5800 px size. Feather range <0 - 100>

Problem is with cv::GaussianBlur time processing with bigger feather value. Smooth of mask with feather 100 take 120 sec.

Is there some setting of Gaussian Blur which can speed up calculation of blur mask ellipse edge?

There is example of Gaussian blur in one thread http://www.jayrambhia.com/blog/opencv... But I am processing multiple images parallely and these can slow down other images.

Thank you