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| author | Søren Sandmann Pedersen <ssp@redhat.com> | 2011-12-17 02:43:10 -0500 |
|---|---|---|
| committer | Søren Sandmann Pedersen <ssp@redhat.com> | 2013-07-29 06:21:51 -0400 |
| commit | 20caaa3f0521e05cec37e2f98df874592997949a (patch) | |
| tree | 859debe9c297d273f43cffe8370961cd7b640112 | |
| parent | d46232defc798384f8ef939cfe2f4b15be2f0c91 (diff) | |
dither
| -rw-r--r-- | docs/yuv-dither.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/yuv-dither.txt b/docs/yuv-dither.txt index 34be7382..1c29ebd2 100644 --- a/docs/yuv-dither.txt +++ b/docs/yuv-dither.txt @@ -1,3 +1,12 @@ +New algorithm: + +First generate white triangular sRGB noise. Then, convert to +s-CIELAB. Then swap pixels until the s-CIELAB error metric is a +minimal distance from a black image. + + +Older algorithm: + We must choose a box in YUV space. The edges of that box decide how much noise to add in each of the three dimensions. If we assume HVS has these relative sensitivities: |