Re: [FFmpeg-devel] Rework color quantization in palette{gen,use}

[Michael Niedermayer <michael@niedermayer.cc>]

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On Sun, Nov 06, 2022 at 06:09:41PM +0100, Michael Niedermayer wrote:
> On Sat, Nov 05, 2022 at 04:26:02PM +0100, Clément Bœsch wrote:
> > Hi,
> > 
> > This patchset essentially fixes a few core problems in these filters and
> > switches to a perceptual model.
> > 
> > I've generated a report for each key commit on this (temporary) page:
> > http://big.pkh.me/pal/ (warning: heavy page, ~500M; I did try to add some lazy
> > loading of the images but I'm not sure it's actually working as expected).
> 
> i just looked at file00 and 16 and 64 colors with dither for it and they look
> different, some areas look better before and some better afterwards

looked at more of the 16 color cases with dither 
(16 colors as i asumed fewer would magnify any issues )
file 01, IMHO current looks better than last (variance per axis)
file 02, IMHO current looks better than last (variance per axis)
file 03, IMHO VPA looks better but both really are quite off in terms of color,
         thats not the color of the original image.
file 04, VPA is not good thats not the correct color

It seems th last (variance per axis) is more pale and looses color


> 
> Have you done any double blind comparission ?


[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

If you think the mosad wants you dead since a long time then you are either
wrong or dead since a long time.

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