[argyllcms] Re: dispcal VDT DE 2K measurement discrepancy

  • From: Roger Breton <graxx@xxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Sun, 21 Dec 2014 12:52:05 -0500

Can you wait 30 minutes before your calibrate? My brand of monitor is 
surprisingly stable over time.

Just saying.

/ Roger

-----Original Message-----
From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx] On 
Behalf Of Vallo Kallaste
Sent: 21 décembre 2014 10:26
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: dispcal VDT DE 2K measurement discrepancy

On Sat, Dec 20, 2014 at 02:28:09PM +1100, Graeme Gill <graeme@xxxxxxxxxxxxx> 
wrote:

> Vallo Kallaste wrote:
> 
> > reproducibility? I mean that when near lab-grade instrument is able 
> > to give reproducibility in ± 20 K range then my assumptions about 
> > consumer grade instruments are plainly wrong.
> 
> Color temperature in degrees K is notoriously non-linear. So there is 
> no proportionality between a change in degrees K and the visual effect.
> 
> A more linear measure is Mired: <http://en.wikipedia.org/wiki/Mired>

Ok, something to think about, althought I hoped for simpler answer :) But of 
course color mng. is not simple because it revolves around our vision.
I have lost some faith in instruments and measurements but will not sweat it.
The main point being that ± 200K or ± 5 dE variance seems to be something I 
have to live with. My main monitor WP drifts >2 dE in 30 minutes, no meaning to 
aim higher.
--
Vallo


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