[argyllcms] Huey and Eye One Pro give radically different results on XL20
- From: Leonard Evens <len@xxxxxxxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sun, 12 Apr 2009 12:03:34 -0500
I've made no efforts yet to calibrate/profile my new XL20. The monitor
was as delivered. It was set to custom settings which I presume were
set by Samsung.
Here are the results of dispcal -r using the Huey that came with it and
my Eye-One-Pro. I wasn't sure how to place the Huey. I put in so it
seemed entirely within the test window and I ran a length of tape on the
bottom of the Huey to the frame to try to keep it flat on the screen.
Here is what I got
Huey:
[len@localhost ~]$ dispcal -r -yl
Place instrument on test window.
Hit Esc, ^C or Q to give up, any other key to continue:
Current calibration response:
Black level = 0.19 cd/m^2
White level = 116.80 cd/m^2
Aprox. gamma = 2.03
Contrast ratio = 624:1
White chromaticity coordinates 0.2689, 0.2949
White Correlated Color Temperature = 10922K, DE to locus = 12.4
White Correlated Daylight Temperature = 10923K, DE to locus = 9.7
White Visual Color Temperature = 9095K, DE to locus = 11.6
White Visual Daylight Temperature = 9518K, DE to locus = 9.1
The instrument can be removed from the screen.
Eye One Pro
[len@localhost ~]$ dispcal -r
Place cap on the instrument, or place in on a dark surface,
or place on the white calibration reference,
and then hit any key to continue,
or hit Esc, ^C or Q to abort:
Calibration complete
Place instrument on test window.
Hit Esc, ^C or Q to give up, any other key to continue:
Current calibration response:
Black level = 0.30 cd/m^2
White level = 228.53 cd/m^2
Aprox. gamma = 2.09
Contrast ratio = 770:1
White chromaticity coordinates 0.3051, 0.3341
White Correlated Color Temperature = 6875K, DE to locus = 11.5
White Correlated Daylight Temperature = 6867K, DE to locus = 8.5
White Visual Color Temperature = 6383K, DE to locus = 11.1
White Visual Daylight Temperature = 6528K, DE to locus = 8.1
The instrument can be removed from the screen.
Note the Eye One Pro doesn't need a monitor type specification since it
is a spectrometer.
The white level readings from the Eye One Pro seems much more consistent
with what I see visually by looking at the screen.
I presume I am somehow not using the Huey properly or else it is set up
only to work with the Vendor software under Windows. I believe there
may have been some discussion of this issue in this forum, but I didn't
follow it.
Any comments.
--
Leonard Evens <len@xxxxxxxxxxxxxxxxxxxxx>
Mathematics Department, Northwestern University
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