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

  • From: Iliah Borg <ib@xxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Fri, 23 Nov 2012 21:17:11 -0500

Dear Ben,

> If I may ask: what are you using to process your raw files?

RPP of course, as I'm one of two people behind it. It was initially written for 
just our own needs. 

If you want RPP to do nothing fancy, set colorimetric gamma and raw tiff as 
output. In that case it will only apply white balance to raw data, and simple 
gamma curve. Linear exposure compensation is in "Exposure" - I added 2/3 of a 
stop for this one. You may want to use "half-mode" if the camera resolves the 
target well enough.

PNG image

>> There is also a sort of two-stage approach possible, to reduce the noise. 
>> Make a matrix profile, and follow it with Lab-to-Lab correction profile.
> Can you shed a bit more light on this?

I will, I promise.

> If I had to guess, you'd first generate a profile normally with -a s (or -a 
> g?)...and then...um...actually, I think I get lost at that point...


Iliah Borg

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