Re: Photoshop Gamut warning vs ColorThink
Re: Photoshop Gamut warning vs ColorThink
- Subject: Re: Photoshop Gamut warning vs ColorThink
- From: Roger Breton <email@hidden>
- Date: Sat, 23 Feb 2008 21:11:42 -0500
> The invert A2B approach is good at answering
> the question "is this color theoretically within the reach of a device".
> It's not so good for answering the question "is this color reproducible with
> a particular workflow involving possible gamut mappings and interpolated PCS
> to device lookups".
Which could be anything! Different profilers, through the same rendering
intents, off the same training set, will reach different conclusions about
what is in-gamut and what isn't. I think we need a strict definition of what
*is* in gamut and I suspect it is only when a given source color is
converted AbsCol to some destination device. Otherwise, if it's RelCol or
Perc, it really could be anything. To me, AbsCol is the only true matching
criteria that could ever be used to determine whether a source color is in
or out of gamut of some destination device. And I'd even venture to add
further that this exercice is only meaningful between surface colors since
they are relative to the perfect diffuser. I can't really say the same thing
applies between a synthetic space like xRGB and some real-world reflective
print.
Roger Breton
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