https://bugs.kde.org/show_bug.cgi?id=412604
Boudewijn Rempt <b...@valdyas.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |UPSTREAM
--- Comment #6 from Boudewijn Rempt <b...@valdyas.org> ---
Okay, this is the answer for Marti:
"Regarding the issue, I've checked the profile with photoshop and also got
weird results, so chances are the a2b1 proof table is not correct in this
profile.
Softproofing is performed in lcms by two steps. In first step the image is
converted to the target colorspace using the settings the user wish, bpc
rendering intent, etc. Once we have the image in the desired colorspace, we
measure the lab values of the colors. To do so, we use relative colorimetric
(i.e., no gamut remapping) in the reverse direction. This is encoded in the
profile as the a2b1 table and is often called the "proofing" table. This is
different from using the reverse table of perceptual a2b0, which "undoes" gamut
mapping to display the image. So, tables may be diffeent on certain profiles.
This could explain the differences you see.
"
That basically means the profile is borked...
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