avfilter: add grayworld video filter

Multimedia / FFmpeg - Paul Buxton [googlemail.com] - 29 August 2021 11:31 UTC

Implements a gray world color correction algorithm using a log scale LAB colorspace.

e07ada3dac avfilter: add grayworld video filter
Changelog | 1 +
doc/filters.texi | 12 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_grayworld.c | 337 +++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 353 insertions(+), 1 deletion(-)

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