[argyllcms] Re: Custom Illuminant

  • From: Roger Breton <graxx@xxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 03 Jul 2014 15:55:00 -0400

I meant "XYZ (linear) normalization to the raw XYZ measurements of the
"substrate* is applied so that Lab becomes L100 a0 b0 for the paper color."

Roger
 
-----Original Message-----
From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx]
On Behalf Of Roger Breton
Sent: 3 juillet 2014 13:50
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: Custom Illuminant

Robert,

The shift will be the same throughout. 

Think of the way that the raw colorimetric measurements for an output
profile are first encoded into the PCS: there is XYZ (linear) normalization
to the raw XYZ measurements applied so that L=100 a=0 b=0 on the device
paper. That's what gets encoded into the RelCol tag (A2B0).

Roger


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