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Clone Gaussian Filter of Photoshop

asked 2016-09-29 08:52:15 -0600

ZhangYun gravatar image

I tried Gaussian Blur of OpenCV. But it shows different result from Photoshop. For example, I was asked to input radius in Photoshop. So I typed 25.

And by using OpenCV, I coded as follows.

cv::Mat cvMat = cv::imread("1.jpg"); // this image is a grayscale image.
cv::Mat gb;
cv::GaussianBlur(cvMat , gb, cv::Size(25*2+1, 25*2+1), 25);

But I got different result. So I tried 50, instead of 25 and after that, I saw similar result, but still different. What should I do to get the same result as Photoshop Gaussian Filter?

Thank you.

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opencv != photoshop

berak gravatar imageberak ( 2016-09-29 10:09:06 -0600 )edit

I know. That's why I asked how to make same effect as Photoshop with OpenCV. It seems you don't know how to do.

ZhangYun gravatar imageZhangYun ( 2016-10-02 23:44:38 -0600 )edit

you're simply (ab)using the wrong library.

berak gravatar imageberak ( 2016-10-02 23:46:08 -0600 )edit

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answered 2016-09-29 10:53:38 -0600

Tetragramm gravatar image

HERE is the documentation that describes OpenCV's choice of sigma based on size. It's up you to figure out how Photoshop does it.

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Asked: 2016-09-29 08:52:15 -0600

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Last updated: Sep 29 '16