Re: ICC v4, was: Gretag's IQueue 140 not processing correctly with V4 profiles
Re: ICC v4, was: Gretag's IQueue 140 not processing correctly with V4 profiles
- Subject: Re: ICC v4, was: Gretag's IQueue 140 not processing correctly with V4 profiles
- From: Chris Murphy <email@hidden>
- Date: Mon, 21 Nov 2005 08:28:24 -0700
On Nov 17, 2005, at 12:01 PM, Graeme Gill wrote:
It depends on the profile construction (tools). If I want good
reproduction
using V2 and a "dumb" CMM, then I'll make sure that the destination
profile gamut mapping is explicitly configured for mapping the source
profiles gamut. (That's one of the two effective workarounds for the
problems inherent in V2 profiles.)
Most profiling tools (the vast majority) on the market have no clue,
and no means to give them one, about the source profile. Therefore
they have no idea what the source profile gamut is.
And the problem with doing so is that if you have an image in sRGB,
duplicate it, convert the copy into ProPhoto RGB, you have two images
with identical colorimetric definition for the image contained inside
two very different gamuts. Any gamut mapping routing predicated on
the source gamut rather than the actual colors in the image is doing
to render those two identical images differently, perhaps so
different that it would be unacceptable.
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
-------------------------------------------------------------
Co-author "Real World Color Management, 2nd Edition"
Published by PeachPit Press (ISBN 0-321-26722-2)
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