[cairo] RGB to CIELab transformation

Øyvind Kolås pippin at gimp.org
Fri Jan 20 05:13:27 PST 2012

On Fri, Jan 20, 2012 at 11:30 AM, Kai-Uwe Behrmann <ku.b at gmx.de> wrote:
> Am 20.01.12, 11:55 +0100 schrieb Andrea Canciani:
>> On Fri, Jan 20, 2012 at 8:01 AM, Necko Nedjoni <opustenom at hotmail.com>
>> wrote:
>>> As a part of a larger project, I was recently assigned to investigate the
>>> possibility of colorings
>>> within our visualizations.
> Cairo has no support for colour spaces with asymmetric gamma like CIE*Lab
> during blending. One can expect in Cairo hue changes during blending CIE*Lab
> content.

The way I read this question, it is about choice of color, in
particular choosing colors that are perceptually different. Using CIE
Lab and the euclidian distance there (delta E) for choosing the colors
would be different from doing the blending of AA or other computation
on the colors. (sticking strictly to maximising the perceived
differences would however not contribute to getting a pleasant color

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