Re: Evaluating black point
Re: Evaluating black point
- Subject: Re: Evaluating black point
- From: Stefan Ohlsson <email@hidden>
- Date: Thu, 02 Jul 2015 08:59:09 +0300
CMYK profiles are indeed a different thing, but I was checking RGB printer profiles.
Stefan
> 2 jul 2015 kl. 02:54 skrev Graeme Gill <email@hidden>:
>
> 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.
>
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