[argyllcms] Re: gamut mapping. Excuse me for mistake.

Ouch...
I've saw just only want to saw... I've didn't notice "out" in "completely out 
of gamut" phrase. So my previous message is completely mistake.
I'm sorry.

-----Original Message-----
From: Nikolay Pokhilchenko <nikolay_po@xxxxxxx>
To: argyllcms@xxxxxxxxxxxxx
Date: Fri, 24 Jul 2009 08:46:52 +0400
Subject: [argyllcms] Re: gamut mapping

> nome cognome wrote:
> 
> > I did some tests using AdobeRGB as starting space and sRGB as
> > destination space. My monitor is a wide gamut one, so Adobe RGB is
> > fully contained in its gamut.
> > I used both Relative and Perceptual (with Argyll gamut mapping)
> > intents. The original image contains a gradient completely out of
> > gamut for sRGB,  so using Relative intent I should obtain a uniform
> > color, while using Perceptual intent with gamut mapping I should
> > obtain the same (but shifted) gradient.
> 
> This is a rather useless test, because the sRGB gamut completely go in the 
> AdobeRGB(1998) gamut without any gamut compression. So the mapping algorithm 
> acts just as simple relative conversion.
> 
> > But there are no differences between Relative and Perceptual intents :( 
> 
> Yes! It means that Argyll's algorithms are consistent and don't distort 
> colors without needs.
> You should use the reversal test - from AdobeRGB gradients to sRGB.
> 
> > This is a 3-levels tiff with the original AdobeRGB gradient, the
> > sRGB/Relative and the sRGB/Perceptual ones:
> > http://darkbasic.homelinux.com/images/sv2/3_levels.tif  (10.6 MB)
> > 
> > You will need a wide gamut monitor to see the differences between
> > AdobeRGB and sRGB, otherwise you will have to use the color picker.
> 
> I can just do perceptual conversion to my laptop display profile :)
> 
> > Cheers,
> > 
> 
>

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