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using:video_filter_median_5x5 [2012/11/11 08:51] (current) |
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+ | ====== Video filter Median (5x5) ====== | ||
+ | This is a version of the Median filter that takes a 5x5 matrix instead of a 3x3 one. The strong smoothing is especially efficient on analog video (e.g. captured from VHS) with chroma noise, rainbow effects (e.g. white credits on black background at the end of a movie) etc.(nbsp)(ndash) Median 5x5 applied only on chroma greatly reduces these artifacts. | ||
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+ | Example - analog video with strong chroma noise: | ||
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+ | {{:using:chroma-noise2a.jpg}} | ||
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+ | Convolution filters applied on chroma clean it up: | ||
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+ | {{:using:chroma-noise2b.jpg}} |