Re: Ugra/Fogra Media Wedge v3.0 [was: Colorsync-users Digest, Vol 5, Issue 299]
Re: Ugra/Fogra Media Wedge v3.0 [was: Colorsync-users Digest, Vol 5, Issue 299]
- Subject: Re: Ugra/Fogra Media Wedge v3.0 [was: Colorsync-users Digest, Vol 5, Issue 299]
- From: Klaus Karcher <email@hidden>
- Date: Wed, 10 Sep 2008 22:36:23 +0200
Mike Strickler wrote:
If you absolutely MUST have a shootout (does anyone really have time for
this?), use a full ECI2002 or IT8.7/4 chart. The results can be quite
different numerically--one "problem" color on a control wedge can skew
the result misleadingly. [...]
Even better would be to use separate profiling- and test-sets. When you
use the same data set for profiling and verification, you can't get much
information about the true quality of the profile: the grid points of
the profiling target should be "hit" by any decent profiler -- but how
about the huge space between them? This especially applies to
iteratively optimized profiles ... and there are apparently better and
worse implementations -- see
<http://lists.apple.com/archives/colorsync-users/2005/Nov/msg00230.html>
Profilemaker does a perfectly fine job and does not "fall apart
in the shadows," so my guess is that there is a more fundamental problem
there, possibly in your ink limiting in the RIP or the way you're
setting up PM.
I can confirm that Martin has *no* fundamental problems with his ink
limits or profiling parameters. I have 3 profiles, all of them made
with his data set, all with 400 TIL / 100% K. Two of them shorten the
available gamut in the shadows, one does not:
PrintOpen:
<http://digitalproof.info/colorsync-users/Epson880_GMGSemiMatte_MaxK_vs_ic2.png>
ProfileMaker:
<http://digitalproof.info/colorsync-users/E9880PM_vs_iC2.png>
Argyll:
<http://digitalproof.info/colorsync-users/E9880_vs_IC2.png>
Klaus
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