Hi Jan-Peter,
As lcms actually the described functionality for mapping pure grey /
building such devicelinks on the fly ?
That's what I'm trying to do. The tone map already works. That is, pure
K of origin is converted to pure K of destination in a way L* is preserved.
No CMY is involved here. Then comes the difficult part, recompute the
amounts of CMY to obtain same color. And here it would be nice to preserve
the separation whatever possible. But this is, right now, not my primary goal.
Unfortunately, this is *very* complex, mostly because many profiles have
AToB/BtoA tags of different resolution/accuracy, so AtoB is not the inverse
of BToA in many cases. Therefore, a robust algorithm should compensate
those differences in order to get consistent results. Pfew!
Regarding TAC... There is actually a cmsCreateInkLimitingDeviceLink()
function that allows you to apply TAC. But that is pretty limited as it uses
the hypercube algorithm. For a more advanced inklimit, we would
need some additional information (i.e., ink weight curves) which is not
available on the profile.
Regards,
Marti.
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