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

  • From: Chris Lilley <chris@xxxxxx>
  • To: Iliah Borg <ib@xxxxxxxxxxx>
  • Date: Mon, 26 Nov 2012 19:36:56 +0100

On Monday, November 26, 2012, 7:28:34 PM, Iliah wrote:

IB> Dear Ben,

>> Perhaps an iterative or integrated (in the Calculus sense) approach could 
>> permit doing color profiling on the raw channel data before demosaicing?

IB> Before demosaicking, that is before some form of recombination of
IB> raw channels, we do not have colour information at all. We need to
IB> run recombination / demosaicking to calculate two missing
IB> components for each pixel. Raw channel data is some form of
IB> monochrome, recorded as shades of grey so to speak.

This is true if spatial resolution is of importance. For large, evenly lit 
solid color patches, though, it seems that per-channel averages over a large 
number of photosites could be done without demosaicking.

 Chris Lilley   Technical Director, Interaction Domain                 
 W3C Graphics Activity Lead, Fonts Activity Lead
 Co-Chair, W3C Hypertext CG
 Member, CSS, WebFonts, SVG Working Groups

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