Re: Evaluating black point
Re: Evaluating black point
- Subject: Re: Evaluating black point
- From: Graeme Gill <email@hidden>
- Date: Thu, 02 Jul 2015 09:54:17 +1000
Stefan Ohlsson wrote:
> But I noticed something odd when I followed your advice. I expected to get the same
> result if I used perceptual rendering or if I used relative colorimetric with black
> point compensation. But no, at least on the 4 profiles that I tested.
The black point of a CMYK device is something of an arbitrary choice. It depends
on the maximum ink you want to use as well as any black chromaticity target,
and it may also depend on how gamut clipping is handled, if the chromaticity target
isn't achievable. And then if you are depending on the B2A table to look it up,
it may not be represented terribly accurately in the profile compared to a
black point tag.
Graeme Gill.
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