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Don't scale chroma subsampled images to sizes that don't align with the subsampling...
v2.15.166
author
Carl Hetherington
<cth@carlh.net>
Sun, 3 Oct 2021 19:22:14 +0000
(21:22 +0200)
committer
Carl Hetherington
<cth@carlh.net>
Sun, 3 Oct 2021 21:41:02 +0000
(23:41 +0200)
There's a slightly odd effect when scaling e.g. YVU420 images to
odd and then even widths - there's a small but visible luminance
shift. I don't know why this happens, but keeping the scaling
sizes locked to the subsampling seems to help.
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