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medianBlur KxK matrix size

asked 2015-10-13 06:10:15 -0500

NicoCarosio gravatar image

Do anyone knows why medianBlur use a KxK size for the Matrix Kernel while Blur and Gaussian use a MxN matrix as Kernel? May be you @StevenPuttemans know the answer ;)

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Lol I tell to many people to call me by my name =/ nope sorry, I have not a clue. First guess would be implementation details, but I should have a deeper look.

StevenPuttemans gravatar imageStevenPuttemans ( 2015-10-13 06:18:35 -0500 )edit

I am guessing that it depends on the nature of the filter. Look here on how OpenCV calculates it median filtering. It needs a center value, which means that you would need odd dimensions for a starter.

Why it doesn't allow for example to use a 5x3 kernel, I yet have to discover.

StevenPuttemans gravatar imageStevenPuttemans ( 2015-10-13 06:22:15 -0500 )edit

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answered 2015-10-13 06:29:36 -0500

Btw, it is possible in OpenCV to use a mask combined with bluring to achieve non-square median blurring. Take a look here:

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Asked: 2015-10-13 06:10:15 -0500

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Last updated: Oct 13 '15