[argyllcms] Re: dispwin vs xcalib loading LUT

  • From: Frédéric <frederic.mantegazza@xxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Mon, 1 Jan 2007 13:33:59 +0100

On Monday 01 January 2007 13:26, Stefan Döhla wrote:

> > xcalib should change the grafics card gamma table as described in the
> > vcgt tag. I would guess xcalib is not supporting the parametric entry
> > (~2.2) in opposite to the most often used curves.
> Hm, that's not right. There's just the system gamma which is used in
> xcalib and not used in dispwin. Whether it's right or not: xcalib went
> the way of the other calibration loaders, dispwin the "clear" way.
> >> *But*, when I load an Argyll generated profile (also attached), they
> >> both give the same result!
> >
> > The argyll profile uses a curved vcgt tag.
> Right, the gamma profiles use the VideoCardGammaFormula whereas the
> Argyll-profile uses the VideoCardGammaTable. The table leaves no
> space for misinterpretation - wherease the formula does ...

Thanks to all for the explanation; I understand, now.



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