[argyllcms] Camera profiling generation and blown highlights
- From: Pascal de Bruijn <pmjdebruijn@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Thu, 21 Jan 2010 23:44:38 +0100
Hi,
I've been experimenting again, with profiling my camera once more...
I'm retrying the CMP DT3 (not 003) target again, and initial results
are encouraging, but there a but :)
In the past I've had some issues with some profiles blowing out my
highlights, and I never got that really resolved.
I uploaded a test case to my website:
http://files.pcode.nl/temp/ufraw-argyll-cmp-blowout-case.zip
IMG_3380.tif - Native (16bit) Linear Camera RGB
IMG_5804.ti3 - CGATS data from which the profiles were generated
IMG_5804_as.icc - colprof -qm -as
IMG_5804_aS.icc - colprof -qm -aS
IMG_5804.icc - colprof -qm -al
When applying all but the aS profile, I get odd color (cyanish)
artifacts in the highlights which got blown out by the profile.
The best general color rendition for images without problematic
highlights is the -qm -al profile.
I'd appreciate any tips and pointers, on how I could get the LAB LUT
profile to deal well with the highlights.
Compromises on accuracy are acceptable in dealing with the highlights.
Regards,
Pascal de Bruijn
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