Changeset 3e601662 in ffmpeg

Timestamp:

Mar 25, 2014, 12:48:06 PM (11 years ago)

Author:

Michael Niedermayer <michaelni@gmx.at>

Branches:

master

Children:

e6fe804

Parents:

a490970a

git-author:

Øyvind Kolås <pippin@gimp.org> (03/23/14 01:13:26)

git-committer:

Michael Niedermayer <michaelni@gmx.at> (03/25/14 12:48:06)

Message:

swscale: add two spatially stable dithering methods

Both of these dithering methods are from ​http://pippin.gimp.org/a_dither/ for
GIF they can be considered better than bayer (provides more gray-levels), and
spatial stability - often more than twice as good compression and less visual
flicker than error diffusion methods (the methods also avoids error-shadow
artifacts of diffusion dithers).

These methods are similar to blue/green noise type dither masks; but are
simple enough to generate their mask on the fly. They are still research work
in progress; though more expensive to generate masks (which can be used in a
LUT) like 'void and cluster' and similar methods will yield superior results

(No files)