[argyllcms] Re: Camera calibration: LUT only as good as matrix?
- From: Torsten Bronger <bronger@xxxxxxxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sat, 13 Jul 2013 22:02:10 +0200
Hallöchen!
Iliah Borg writes:
> Dear Torsten,
>
>> dcraw -M -o 0 -4 -T -r 255/R 255/G 255/B 255/R -b 255/R -H 1 <rawfile>
>
> Consider using half-mode (-h) because you do not need additional
> noise and colour problems added by demosaicking.
I don't know whether it really applies here, but I had trouble with
-h due to
<https://bugs.launchpad.net/ubuntu/+source/dcraw/+bug/1122833>.
> [...] I'm a little confused with second 255/R
It is because dcraw normalizes the -r values so that the first
channel is scaled to 1.0.
Tschö,
Torsten.
--
Torsten Bronger Jabber ID: torsten.bronger@xxxxxxxxxxxxxxxxxxxxx
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