[argyllcms] Re: Measuring a colorcheker on screen

Am 24.01.08, 09:03 +0100 schrieb Kai-Uwe Behrmann:
> Am 24.01.08, 18:16 +1100 schrieb Graeme Gill:
> > Kai-Uwe Behrmann wrote:
> > 
> > > The display in CinePaint, even with the ICC absolute rendering intent, is
> > > not CIE absolute. The later would be in need to do a real light
> > > comparision. You measurings are in need to scale up or down to match the
> > > monitors white- and blackpoint.
> > 
> > Black point can be recorded in profiles, but isn't (shouldn't!)
> > be used in any way to change the profile data.
> 
> Indeed the black point tag for display profiles says almost nothing, like 
> what the ICC spec requires: map to 0,0,0 .

Ooops, this was not correct from me. The blackpoint tag is not restricted 
to 0,0,0. (9.2.24 mediaBlackPointTag)

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

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