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List: kde-kimageshop
Subject: What coefficients does Krita use for YUV/YCbCr?
From: Matthew Woehlke <mw_triad () users ! sourceforge ! net>
Date: 2007-05-23 20:37:29
Message-ID: f328m9$516$1 () sea ! gmane ! org
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I don't know if anyone follows k-c-d, but I'm working on a color
blending function for kdelibs that will support HSY color space (like
HSL but with luma as in YUV/YCbCr color spaces). Alas, there are two
common sets of coefficients used to calculate Y:
601: Y' = 0.299 R' + 0.587 G' + 0.114 B'
709: Y' = 0.2126 R' + 0.7152 G' + 0.0722 B'
I figure this is probably the best place to ask; which would be better
to use in kdelibs (or should I offer /both/)? Which does Krita use?
--
Matthew
"I can hear you / just barely hear you / I can just barely hear you"
-- "I Can Hear You", by They Might Be Giants
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