I have not yet received any response related to this topic. I am
pleased to report that I was able to use lcms with the sample profiles
to obtain results which are very similar to results obtained using my
own implementation of the transform. Perhaps the D50 is only a
LAB-space thingy which does not alter the final result.
Bob
On Sat, 12 Nov 2005, Bob Friesenhahn wrote:
The lcms profiles collection provides some Rec.601 and Rec.709 YCbCr to LAB
profiles. These have a whitepoint of D50 while Rec.601 and Rec.709 use D65
as their native whitepoint.
Can these existing profiles be used to perform a proper conversion from
Rec.601/Rec.709 YCbCr to RGB (e.g. sRGB) even though they are claimed D50
rather than D65?
Do any profiles exist for Rec.601/Rec.709 which are for the equivalent RGB
rather than YCbCr? What is necessary in order to create such a profile?
Bob
======================================
Bob Friesenhahn
[EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
======================================
Bob Friesenhahn
[EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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