[argyllcms] Re: Generated camera profile too bright

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Wed, 04 Apr 2012 10:32:18 +1000

Chris Lilley wrote:
> The L value for the white patch in the color checker should be 95, not 100, 
> no? (And the 'black'
> patch actually has L of around 20).

Something like that, but the profile data is relative colorimetric, and
the 95% (or whatever) white patch will become PCS 100% white by default.

The -u flag allows building a (non standard) absolute colorimetric profile
in which the white patch becomes its expected reflectance (ie. 95%).

Graeme Gill.

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