GSoC CM collaboration

[Kai-Uwe Behrmann]

Am 02.03.08, 21:43 +0100 schrieb Maarten Maathuis:
> On 3/2/08, Kai-Uwe Behrmann <ku.b at gmx.de> wrote:
> > Am 02.03.08, 21:01 +0100 schrieb Maarten Maathuis:

> >  > You're essentially assuming that the individual color channels are not
> >  > linearly independent?
> >
> >
> > You cant correct a very saturated red from a wide gamut monitor with just
> >  modifying the red curve to a less saturated red, say to match sRGB.
> >
> >  This colour transformation involves mixing in of some blue and green to
> >  reduce the saturation. Hence it is no longer one dimensional.
> 
> I would like to add, that would you propose is unrealistic.
> 
> A 256^3 * 3 bytes matrix is 48 MiB large (this would become 64 MiB on
> some/most hardware due to a lack of a real 24 bits texture format).
> It's also something you don't want to do in software, and still
> expensive to do in hardware. It's certainly non-trivial to implement
> and i don't expect it to happen.
 
You could answere in context to avoid such irritation. No one talked about 
such a large 3D CLUT tables.

kind regards
Kai-Uwe Behrmann
-- 
developing for colour management 
www.behrmann.name + www.oyranos.org