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--- using:video_filter_gauss_smooth [2010/04/15 17:48]
j.m created
+++ using:video_filter_gauss_smooth [2012/11/11 08:51]
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-====== Video filter Gauss smooth ======
-This is the first filter from the convolution filter family(nbsp)(ndash) Gauss smooth, Mean and Median. The convolution filters take a 3x3 matrix and apply it to the pixel neighbours. They can be applied on luma/chroma or both.
-When they're applied on chroma only, they are very efficient to get rid of chroma noise from analog TV or VCR capture. For even more effective chroma smoothing, see the [[Video filter Median (5x5)|Median (5x5)]] filter.
-Typical chroma effects on analog video may look like this:
-{{:using:chroma-noise1a.jpg}}
-Applying some convolution-based filters on chroma reduces the artifacts:
-{{:using:chroma-noise1a.jpg}}
-The good thing about blurring chrominance is that it does not affect the perceived picture sharpness and structure too much, as that's mainly determined by the luminance part.

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