[argyllcms] Re: Imaginary colors
- From: Gerhard Fuernkranz <nospam456@xxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sun, 09 Dec 2012 02:08:07 +0100
Am 08.12.2012 22:13, schrieb James Cloos:
It seems that, instead of converting a given colour to 2-space to
compare against the locus, it should be possible to convert the locus
into a close 2-d surface in 3-space.
That could then be converted into any 3-d colour space.
Working in 3D does IMO only make sense if you additionally define an artificial
intensity limit, since the potential intensity of light spectra is per se
unbounded, which would lead to an locus in 3D space with infinite size (in xyY
space for instance, the 3D locus would be a cylinder having the horseshoe as
base, but having infinite height).
Best Regards,
Gerhard
Testing whether a number of 3-d points are inside a 3-gon should be much
faster than converting each of them into XYZ and on to xy to test whether
they lie inside the 2-gon.
And it would be useful to know where the locus is in spaces like scRGB12nl
and scYCC12nl.
Has anyone done and published the math?
goog hasn't found anything for me.
-JimC
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