[argyllcms] Re: gamut mapping
- From: edmund ronald <edmundronald@xxxxxxxxx>
- To: Klaus Karcher <lists@xxxxxxxxxxxxxxxxx>
- Date: Fri, 24 Jul 2009 09:55:59 +0200
Oh, I'll be glad to help with documentation. If it works. This monkey
only trusts his own lying eyes.
I've been waiting for years for something like this, because otherwise
I have to do it by hand like every other art printer. So I was very
enthusiastic when Klaus first launched his tool.
Note that adaptive gamut mapping is not something you want to over-use
if you are in prepress: Images in a batch containing the same colors
eg. various shots of the same model in the same dress, or scarves from
a collection silk-printed with the same dyes, need to match on the
printed page.
Edmund
On Fri, Jul 24, 2009 at 9:07 AM, Klaus Karcher<lists@xxxxxxxxxxxxxxxxx> wrote:
> edmund ronald wrote:
>>
>> I don' know if this is relevant here, but I'm highly sceptical of
>> using Argyll to achieve adaptive gamut compression. When I tried that,
>> prints got worse rather than better. Of course I'm not very
>> knowledgable about this computer stuff although I trust my eyes - but
>> maybe my friend Klaus has an opinion?
>
> ... well -- gamut compression is always a dirty business ;-)
>
> joking aside: While the adaptive gamut mapping approach of ArgyllCMS is dead
> right IMHO, there were definitely issues in argyll 1.0.3 (GaMapICC 0.1),
> frequently noticeable in saturated reds.
>
> While Graeme seeks for flaws in the gamut mapping /algorithms/ (If I got his
> last post right), I spent quite some time in optimizing the gamut mapping
> /parameters/ (file gammap.c of the V1.1.0_Beta snapshot) ... and at least
> /I/ am quite satisfied with the result ;-) -- see my updated page
> <http://digitalproof.info/gamapicc/examples.html>
>
> If you like to test GaMapICC in its current state, you can download it from
> <http://digitalproof.info/gamapicc/GaMapICC0.3b.zip>.
>
> Please note that this is no complete release yet: it's Intel-only and
> contains only the essential files (no growl, no source code, no
> documentation). See also <http://digitalproof.info/gamapicc/> and feel free
> to contact me if there are any further questions.
>
> Klaus
>
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