[argyllcms] Re: Display calibration
- From: Rolf Gierling <mail@xxxxxxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sun, 02 Dec 2007 14:29:06 +0100
Hi Frédéric, hi Graeme,
Initial native brightness target = 80.845374 cd/m^2
Had to scale brightness from 80.845374 to 80.818901 to fit within
gamut Target white value is XYZ 40.724326 80.818901 84.670188
Notice the strange X value - this is because you've let dispcal
calibrate to the native white point, and you've set your native white
point to be extremely green.
Graeme,
XYZ 40 80 84 is not only a green cast, this is so green it can't be
overseen.
Frédéric,
if you have an i1 display 2, it should have come with an ambient
light head.
(that milky white transparent plastic thing that is not easy to remove)
Try using argylls spotread and measure a simple incandescent light bulb
(not halogen, not fluorescent) :
spotread -a
adjust the distance until you get dimensions like mine, esp. a L
value around 80:
Result is XYZ: 69.468412 58.173981 12.077657, D50 Lab: 80.835422
30.845398 61.545526
Ambient = 182.8 Lux, CCT = 2292K (Delta E 1.635531)
Closest Planckian temperature = 2279K (Delta E 0.870795)
Closest Daylight temperature = 2244K (Delta E 22.234008)
if your X value is far off, ie. only in the dimension of 45 or lower,
and spotread tells you
something of a temperature around 4400K or higher, chances are good
your instrument
is faulthy.
Regards
Rolf Gierling
-----------------------------------------------------
Multitools
Dipl.-Ing. Rolf Gierling
Colormanagement
Consulting - Development - Distribution
Mariabrunnstr. 16
52064 Aachen
Germany
Tel. +49 (0) 2 41 / 4 01 25 79
Fax. +49 (0) 2 41 / 4 01 25 83
mail@xxxxxxxxxxxxxxxxxxxx
www.multitools-online.de
Author of "Farbmanagement"
3rd Edition July 2006
mitp Verlag, Bonn
ISBN 3-8266-1626-X
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