[argyllcms] Re: Profile input white not mapping to output white

  • From: Ben Goren <ben@xxxxxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Mon, 26 Nov 2012 11:15:09 -0700


Perhaps an iterative or integrated (in the Calculus sense) approach could 
permit doing color profiling on the raw channel data before demosaicing? 
Granted, it would require more computing horsepower, but modern hardware has 
already caught up to the point that we could tolerate another step back in 
processing speed in exchange for better quality.

Alternatively...RPP (as I understand it) currently does white balancing (before 
demosaicing) by simple linear multiplication of the four channels, if I'm not 
mistraken. It seems to me that applying a shaper / matrix to the channels 
instead of (or in addition to) doing the linear multiplication would 
conceptually accomplish the same end result but with potentially better 

Of course, determining what non-linear adjustments should be made might require 
a profiling mechanism other than the familiar ICC workflow....


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