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List:       koffice-devel
Subject:    Re: first text
From:       Andrew Dorrell <andrew.dorrell () gmail ! com>
Date:       2009-03-03 11:58:17
Message-ID: 49AD1B59.2030201 () gmail ! com
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Cyrille Berger wrote:
> On Monday 02 March 2009, Jos Poortvliet wrote:
> > > HDR... "all kinds of colour spaces"... if that is interesting to you
> > > then you want some specifics.  
> The list of all colorspaces is rather long :) Not sure if it's of 
> interest to the visual tour. Would probably belong to a feature list 
> on Krita's home page.
> 
> 
> > > What precision is used for processing;
> > > what colour spaces are supported; how (and how well) is colour
> > > management (CMS) integrated into the work-flow.
> Krita works (or attempt to) in the native precision of the color 
> space. So if you have a 16bits half image, most computation are done 
> using 16bits floats (actually, for things like convolution, we a 
> higher precision for conversion).
Has anything changed from this:
http://docs.kde.org/development/en/koffice/krita/introduction-keyfeatures.html#introduction-keyfeatures-colormanagement
 ?
> > > Can I work on AdobeRGB or other wide gamut colour spaces?
> So yes you can.

OK this this is important to write aout because the existing 
documentation doesn't mention it 
http://docs.kde.org/development/en/koffice/krita/settings.html#settings-preferences-colormanagement
 http://docs.kde.org/development/en/koffice/krita/colorspaces-list.html#colorspaces-list-rgb
etc.

> Now I said "attempt to" and "most", because while the core of Krita 
> and pigment makes no assumption on the precision, not all color spaces 
> are complete, it's especially true for HDR color spaces, which mostly 
> lack support of curves operations (and probably less interesting, 
> "invert")

Curves are still very interesting for HDR spaces.  But that might be 
another discussion... is this just TODO?

> In one sentence: CMS means that the color looks identical, from your 
> camera, scanner, on your screen and on your printer, provided that you 
> have calibrated each device, and provided Krita with this calibration.
Ideally :-)

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