[argyllcms] Re: Conversion of spectral file to .cie
- From: "Tomas Sobek" <sankalpo@xxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Sat, 15 Oct 2016 06:07:01 +0200 (CEST)
Hi Dp and everyone else,
Thank you all very much for a broad spectrum of responses. I haven't come
across DCamProf before so I will need to spend some time reading and playing
with it. From a quick scan it looks very promissing.
technically people using RawTherapee can use, for example, DCP (and certainly
"ICC/ICM") profiles ( and build ones using DCamProf =
http://forum.luminous-landscape.com/index.php?topic=100015.0 , ;
http://www.ludd.ltu.se/~torger/dcamprof.html , ;
http://www.ludd.ltu.se/~torger/photography/camera-profiling.html ;)... and
the said converter runs in linux (you need to build it first of course)
In the meantime I think the closest to my original questions are notes:
http://www.ludd.ltu.se/~torger/dcamprof.html#import_raw_text
To give you a bit more background why I started looking into the whole colour
profiling area, it's simply to get a better starting point when editing my
images. At the moment I use Darktable as the features provided suit me well.
However in many (maybe majority) of my shots I tend to pull down green tint in
white balance. Especially with skin tones, they seem to come a bit too green
very often. I was hoping that by creating either a general profile (I am using
IT8 target, following Elle's notes in
http://ninedegreesbelow.com/photography/well-behaved-camera-profile.html ;) or
by creating scene specific profiles with ColorChecker Passport I could do that.
And perhaps there is more to it, not just keeping green in check. CC target has
24 patches, so pulling back green tint seems a very rudimentary control
compared to that.
I am not a colour scientist and my criteria for a good starting point is purely
subjective. On the other hand I do enjoy learning new things and playing with
technical toys, so that's the other side for balance. So unless someone has a
specific advise on how to use Argyll's txt2ti3 I will try to make dcamprof
txt2ti3 work instead. I might come back if I fail, or simply use DCamProf's
supplied files instead - at least the documentation says they cover both
variations, before Nov 2014 and after. My target has 09/2014 written on the box
even though I bought it recently.
Also when I compare the profile I created using Argyll's CC24 .cie file with my
profile created with IT8 target, the latter seems to render blue colours more
accurately. Which is why I started questioning Argyll's .cie file and all my
current procedures in the first place ;)
Cheers, Tomas
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