Re: -Dirt- yellows in CMY profiles / long /
Re: -Dirt- yellows in CMY profiles / long /
- Subject: Re: -Dirt- yellows in CMY profiles / long /
- From: "Ernst Dinkla" <email@hidden>
- Date: Tue, 22 Oct 2002 11:00:52 +0200
----- Original Message -----
From: "Graeme Gill" <email@hidden>
To: <email@hidden>
Sent: Tuesday, October 22, 2002 7:46 AM
Subject: Re: -Dirt- yellows in CMY profiles / long /
>
Adriano Von Markendorf wrote:
>
> Well, I always get profiles that made pure yellows very "dirt" (a lot of
>
> Cyan/magenta/black mixed), in menor degree, of course, have some "dirt"
in
>
> pure Magentas and Cyan.
>
>
This often comes down to the gamut mapping algorithm the profiling
>
package uses. Many common algorithms fix the hue and compromise
>
the lightness and/or saturation to map an out of gamut color
>
(and pure yellow is almost always out of gamut from one
>
set of colorants to another) to an in gamut color.
>
>
Those (rare) profiling packages that use a more flexible
>
(dare I say advanced ?) gamut mapping algorithm that allows
>
the hue to be compromised, can give a much purer looking
>
result.
Graeme,
Are those rare profiling packages limited to two: Argyll, Colorbus or are
there more around ?
Could those nice results of the ImagePrint profiles have anything to do with
a less linear mapping as well ?
Ernst
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