[argyllcms] Re: Capture One Profiles
- From: Maciej Bryński <maciek@xxxxxxxxxx>
- To: argyllcms <argyllcms@xxxxxxxxxxxxx>
- Date: Sun, 7 Jul 2013 00:03:20 +0200
2013/7/6 edmund ronald <edmundronald@xxxxxxxxx>:
> At random, I'd say that wb is not so important; especially if you want to
> process for the exact illumination in which you imaged the chart -a
> "situation profile' in which case you just choose a white balance and lock
> it down for ulterior uses of the profile.
The problem is that I'd like to make general use camera profile for
use in different daylight condition so wb IS important.
I have 2 problems:
1) Setting correct WB, but I hope that shifting wb and tint gives me
linear shift of a* and b*, so it'll be possible to create wb,tint ->
a*,b* matrix.
(I can have as many data as I want to :) ). I had a hope that somebody
did it before me.
I miss option from ProfileMaker to use Camera wb and make profile not change wb.
2) As I said I manualy changed wb and tint to the moment when dE on
gray patches is lower than 1.
Unfortunately there is a visible difference between profiles from
Argyll and ProfileMaker and I think that ProfileMaker made better job.
I see color cast on deep blue and magenta patches of IT8.7/2 (KL17-19)
(comparision between calibrated wide gamut monitor and target)
Argyll results (profcheck)
[0.607386] K19: 0.095811 0.189180 0.455330 -> 19.066371 32.121577
-63.826558 should be 19.013502 33.141103 -63.779567
[1.004242] L19: 0.048637 0.135180 0.387260 -> 12.695499 37.168763
-64.801893 should be 12.608060 39.190741 -65.031424
ProfileMaker (profcheck)
[1.054828] K19: 0.095811 0.189180 0.455330 -> 19.571349 30.159904
-60.372242 should be 19.013502 33.141103 -63.779567
[0.982863] L19: 0.048637 0.135180 0.387260 -> 11.731159 37.078710
-62.004068 should be 12.608060 39.190741 -65.031424
Maybe I'm wrong.
--
Maciek Bryński
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