[CREATE] Color palettes specification [Was: Re: LGM 2008 - Call for presentations - deadline extension!]

[Chris Lilley]

On Tuesday, March 11, 2008, 3:45:49 PM, Cyrille wrote:

CB> On Thursday 06 March 2008, Kai-Uwe Behrmann wrote:
>> > > Perhaps we get as well further with the named colour format. Then I
>> > > could start to serialise the Oyranos NamedColour Objects at some point
>> > > :-)
>> >
>> > Well I have allready started to use it in Krita for serializing colors
>> > (Krita can't read palettes using the spec). The spec is quiet not verbose
>> > enough, but at least it's final (for it's first version). But it's more a
>> > subject for a Create meeting I guess.

>> The Oyranos NamedColour relies on XYZ and arbitrary (up to 16) channels.
CB> XYZ is possible. What are in the 16 channels, is it spectral color space ?

Spectros do often produce 16 (or more) samples but I suspect this is 4 channels for CMYK, 6 for CcMmYK or hexachrome, and more for spot channels.

>> It would be cool to extend to HDR and explore on according rendering
>> intents. Krita could then exchange real HDR values and other applications
>> still should see a LDR representation, possibly derived from the monitor
>> representation.
CB> I am still trying to think how exchanging HDR values is interesting :/ Or even
CB> how saving them in a palette could be interesting. At least, it doesn't fit
CB> in how drawing/painting in HDR is implemented in Krita.

Yes, doesn't it all depend on what tone mapping operation is being used? The visual appearance could be radically different, anywhere from totally black to totally while as a LDR representation.




-- 
 Chris Lilley                    mailto:chris at w3.org
 Interaction Domain Leader
 W3C Graphics Activity Lead
 Co-Chair, W3C Hypertext CG