On Fri, Jan 30, 2015 at 11:42:54AM -0500, Calvin Walton wrote: > On Tue, 2015-01-27 at 14:20 +0100, Clément Bœsch wrote: > > On Sun, Jan 25, 2015 at 07:55:22PM +0100, Clément Bœsch wrote: > > > --- > > > doc/filters.texi | 31 +++++ > > > libavfilter/Makefile | 1 + > > > libavfilter/allfilters.c | 1 + > > > libavfilter/vf_paletteuse.c | 282 > > > ++++++++++++++++++++++++++++++++++++++++++++ > > > 4 files changed, 315 insertions(+) > > > create mode 100644 libavfilter/vf_paletteuse.c > > > > > > > So I did various improvements here by implementing various other > > error > > diffusion based dithering methods: Floyd/Steinberg, Sierra2 and > > Sierra2-4A. All of them seem better than Heckbert. You can observe > > Heckbert vs Sierra4 here: https://lut.im/xAxNDhk4/lGZV0BS4 > > > > This match what's being said on > > http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT about the > > "false" Floyd-Steinberg filter, which is actually from Heckbert > > paper. > > I don't know if you've seen this, but > http://bisqwit.iki.fi/story/howto/dither/jy/ has an interesting and > detailed look through a bunch of positional dithering algorithms > designed for animation that might be interesting. >
Yep I came across that link, and I will probably try to pick a few things in it. Thanks. [...] -- Clément B.
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