[argyllcms] Re: Am I stupid or is it something else... my color management sucks.

  • From: Steffen <mail@xxxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Sun, 11 Apr 2010 15:16:28 +0200

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

The Sypder2 is indeed the problem here. It is not compatible with
widegamut displays. They added 'support' for this with the spyder3.

Greets,
Steffen

Am 11.04.2010 14:38, schrieb Magnus Berg:
> Thank you for your answer Roger.
> 
> I have read the same thing during my search for a solution; that Spyder
> 2 can differ from one unit to unit. And yes, if no one else here on the
> list has any better suggestion to a solution I'm willing to buy a new
> color meter. Spyder 3 it's that expensive.
> 
> Magnus
> 
> 
> 2010-04-11 14:17, Roger Breton skrev:
>> Magnus,
>>
>> I have two Spyder2 here and one of them results in profiles with a
>> terrible
>> green cast. I would not be surprised that the instrument itself is the
>> source of your problems.
>>
>> Roger
>>
>>   
>>> -----Original Message-----
>>> From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-
>>> bounce@xxxxxxxxxxxxx] On Behalf Of Magnus Berg
>>> Sent: 11 avril 2010 07:40
>>> To: argyllcms@xxxxxxxxxxxxx
>>> Subject: [argyllcms] Am I stupid or is it something else... my color
>>> management sucks.
>>>
>>> Hi, I'm new to the list and got a big problem.
>>>
>>> I bought me a used Spyder 2. Realized that my old CTR couldn't produce
>>> enough light (90 cd/m^2 not 140 cd/m^2 that sRGB require). Digged a deep
>>> hole in my wallet and bought a quite expensive NEC 2690WUXI2. Now my
>>> color managed application show a green cast after calibration and
>>>      
>> proofing.
>>   
>>> It's not fun at all. :-(
>>>
>>>
>>> This is how I do the calibration and proofing:
>>>
>>> I use dispcalCUI. After that I had use the screen's OSD to set the
>>> 'White
>>> point', 'White level' and 'Black point' i got this nice values then I
>>> do a
>>>      
>> 'Check
>>   
>>> all':
>>>
>>> Doing check measurements
>>> Black = XYZ   2.28   7.37   0.00
>>> Grey  = XYZ  27.17  28.58  31.02
>>> White = XYZ 130.26 137.22 149.83
>>> 1%    = XYZ   1.38   1.46   1.58
>>>
>>>     Target Brightness = 140.00, Current = 137.22, error = -2.0%
>>>     Target 50% Level  = 50.07, Current = 28.58, error = -15.4%
>>>     Target Near Black =  1.37, Current =  1.46, error =  0.1%
>>>     Target white = x 0.3128, y 0.3291, Current = x 0.3121, y 0.3288,
>>> error
>>>      
>> =  0.38
>>   
>>> DE
>>>     Target black = x 0.3128, y 0.3291, Current = x 0.3120, y 0.3299,
>>> error
>>>      
>> =  1.22
>>   
>>> DE
>>>
>>>
>>> Then dispcalGUI send this command to dispcal:
>>> dispcal -v -d1 -c1 -yl -P0.500317863954,0.485345838218,1.0 -qh -t6500
>>> -b140 -G2.2 -f0 -k0 -A4 -B0.0001 colprof -v -qh -al
>>>
>>> Before, then I only did a -qm calibration, I got strong red casts on my
>>> calibrated screen, and the profiled applications gave strong green
>>> casts.
>>>      
>> The
>>   
>>> strange thing then was that the red cast only occurred on color
>>>      
>> 254,254,254 to
>>   
>>> around 249,249,249 but tones darker than that looked neutral grey
>>> with my
>>> eyes. After that I chose -qh this color tones and others looks neutral,
>>>      
>> with my
>>   
>>> eyes.
>>>
>>>
>>> After that I load the calibration profile done after the command above I
>>>      
>> got
>>   
>>> this then I run dispcal -r -yl:
>>>
>>> magnus@debian:~$ dispcal -r -yl
>>> XRandR 1.2 is faulty - falling back to older extensions Place instrument
>>>      
>> on test
>>   
>>> window.
>>> Hit Esc or Q to give up, any other key to continue:
>>> Current calibration response:
>>> Black level = 0.60 cd/m^2
>>> White level = 135.50 cd/m^2
>>> Aprox. gamma = 1.92
>>> Contrast ratio = 226:1
>>> White chromaticity coordinates 0.3099, 0.3266
>>> White    Correlated Color Temperature = 6676K, DE 2K to locus =  4.9
>>> White Correlated Daylight Temperature = 6676K, DE 2K to locus =  0.3
>>> White        Visual Color Temperature = 6490K, DE 2K to locus =  4.7
>>> White     Visual Daylight Temperature = 6664K, DE 2K to locus =  0.3
>>> The instrument can be removed from the screen.
>>>
>>>
>>> I understand nothing. How can I have gamma 1.92 and the above
>>> temperature then I chose to calibrate to 2.2 and 6500? And why is
>>> there a
>>> green cast on the pictures viewed in Color managed applications?
>>>
>>> Did I understand things right:
>>> I should load the profile as a system wide screen calibration profile
>>> with
>>> dispcalGUI, the same as you do with dispwin -L. And then I load then
>>> same
>>> profile to the color managed applications as a screen color profile?
>>> It's then I load then profile into then color managed applications that
>>>      
>> then
>>   
>>> green cast ampere.
>>>
>>> I have struggled with this for weeks, and googled a lot, and reading
>>> this
>>>      
>> mail
>>   
>>> list without finding any useful help. Therefor I ask you for help. The
>>>      
>> only thing
>>   
>>> I want is a good color managed environment for working with sRGB
>>> pictures.
>>>
>>>
>>>
>>>      
>>
>>
>>
>>
>>    
> 
> 

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iF4EAREIAAYFAkvBy6wACgkQJYXm27tZN3e7cwEAyeZa6oZBvm5tAvys66Qc9a72
6ITd1+i7DGDjRnyC1kwBAIqW3EuOKQdfJBIeDlq0rB9Z5n3aggbZRZz+pCe09so2
=Ekit
-----END PGP SIGNATURE-----

Other related posts: