[argyllcms] Re: help understanding argyll dispcal and spotread output
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 28 Feb 2020 11:23:16 +1100
Wire ~ wrote:
Hi,
Can someone be so kind to explain precisely how to interpret spotread Delta
E output
Delta E to reference is -0.005080 0.048635 -0.008299 (0.049599, CIE94
0.049599)
First three numbers are the delta *L, delta *a & delta *b.
First number in brackets is the total delta E (Euclidean sum
of the first three numbers, AKA delta E 76.) Last number is
the total delta E in CIE94 weighting.
Dispcal reports four different white temps
CCT, CDT, VCT, and VDT?
See <
http://www.argyllcms.com/pro/cmdoc/8000_config.html>
The first two I get... but what are the "Visual" forms?
They are the closest colors on the given locus (black body
or daylight) using CIEDE2000 rather than the obsolete
perceptual CIE 1960 UCS.
How reliable is the Approx gamme result—assuming conventional display space
TRCs?
If you mean the "Aprox. Gamma" value printed by dispcal, then
they are approximate. It's reliable in the sense that it
represents the overall impression of the display curves effect
on perceived brightness, but of course may be quite different
from the detailed display transfer curve shape.
Cheers,
Graeme Gill.
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