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Why need to apply 1D pre-shapers LUT at applyclut function?

조회 수: 2 (최근 30일)
Ying Steven
Ying Steven 2015년 1월 30일
답변: Pengfei Wang 2019년 11월 27일
I read the source code of applyclut.m file, and I don't understand that why need to apply 1D pre-shapers LUT to the ICC profile process flow. As the spec. of ICC profile v4.3.0.0, there are no 1D curves like that,or it means "M" curve of ICC profile model?
% Apply 1D pre-shapers, if present if ~isempty(luttag.PreShaper) out = cellinterp(out, luttag.PreShaper); end

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Pengfei Wang
Pengfei Wang 2019년 11월 27일
Certain type of ICC profile is structed as "Shaper + Matrix", the "shaper" works just like "TRC".
In CLUT case, this tag is normally empty, and the "prematrix" an identity matrix.

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