[argyllcms] Re: AW: How do I create a linear luminance LUT?

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 07 Jul 2011 08:56:19 +1000

Jens Heermann wrote:
If you want to "see" a linear gradation between white and black, you should
use a L*-gamma-calibration, because the L*-gamma-curve is adapted to the
human perception.

Hi,
        while what you say is true as far as it goes,
in detail things are more complicated than that. The L*
is a sort of average of the human perceived response, in that
what is seen as linear depends critically on the surround.

See figure 1 of <http://www.pnas.org/content/99/22/14482.full.pdf>
for instance.

Graeme Gill.

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