[argyllcms] Re: Understanding display profiles

  • From: Volker Sauer <vsauer@xxxxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Sun, 20 Jul 2008 23:04:18 +0200

On So, 20 Jul 2008, "Hal V. Engel" <hvengel@xxxxxxxxxxx> wrote:
> > Okay, understood.
> > A little question: if I specify -t 6500, do I
> > a) need to fiddle around with the display controls to bring the display
> > to 6500?
> 
> You can and this will result in the best overall calibration.  Some monitors 
> allow you to adjust a number of different things and the reason to make these 
> adjustments is to minimize how much adjustment is needed in the LUT curves to 
> achive your calibration targets.
> 
> > b) will the calibration do that for me, when I load the calibration or
> > profile with vcgt tag in to the LUT?
> 
> It can see above.  Normally you woud adjust the monitor controls AND create a 
> vcgt LUT table to get teh best overall results.

Okay, this means the best would result would be to set -t to the exakt
value of the color temperature set up (like 6385), right?


> > And as far as I understood until now, the only possibility is load the
> > .cal-file or the vgct tag to the first monitor with dispwin (at least
> > when I do my photo work) 
> Just do it at startup.  Why would you only do this only at certain times?

Because it would only calibrate the left display resulting in a
significant difference of the background pictures which is annoying when
doing normal office work.


> Well sort of.  But GIMP can use the X11 _ICC_PROFILE atom and should be able 
> to find the correct profile without you having to specify it if the X11 
> _ICC_PROFILE atoms are set.  The same is true for Firefox 3 if you have color 
> management setup.  But it is not true for ufraw and I don't know about 
> digikam.  Recent versions of ArgyllCMS should handle setting up the X11 
> _ICC_PROFILE atoms and loading the LUT(s) at system startup.  You can also 
> use 
> Oyranos oyranos-monitor and xcalib to do the same thing.

Good to know, that gimp and firefox can use the system profile. I'll try
to load it with dispwin -I.

-- 
  Volker Sauer  *  Poststrasse 1/601   *   64293 Darmstadt  *   Germany
  E-Mail/Jabber: vsauer(at)volker-sauer.de * http://www.volker-sauer.de
  PGPKey-Fingerprint: DB26 11C7 B12E 0B27 3999 2E4F 7E35 4E4D 5DD5 D0E0
  http://wwwkeys.de.pgp.net/pks/lookup?op=get&search=0x7E354E4D5DD5D0E0 

Other related posts: