Re: Who's right?
Re: Who's right?
- Subject: Re: Who's right?
- From: Clemens Beisch <email@hidden>
- Date: Tue, 8 Jun 2004 04:30:36 +0200
Am 08.06.2004 um 03:38 schrieb Graeme Gill:
It's hard to tell exactly (because there
doesn't seem to a technical description available of what Adobe
black point compensation is), but from what I gather it's a partial
workaround
>> for the problem ICC profiles have with embedding a
perceptual/saturation
gamut mapping in the destination profile, and expecting that
profiles will normally be linked by simply concatenating them.
No. Black point compensation is a dynamic-dynamic range compression.
The compression you get depends on the source and destination black
points.
Exactly. The gamut compression in the B2A table can't know what the
source
black point is, which is why BPC can be viewed as a workaround for the
limitations of conventional ICC linking.
I think BPC is the first step to a intelliget CMM.
Not one vendor of profiling software tells how the mapping has to be
done and two profiles from different
vendors end in two different results.
The next step should be a dynamic gamut mapping in the CMM looking at
the gamut of source and destination.
And at last. Don't just look at the gamut. Look at the realy used
picture-colors in the gamut. All on the side of the CMM
and not by the profiles.
But this will take a long time.
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