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

  • From: Roger Breton <graxx@xxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Sun, 11 Apr 2010 09:16:22 -0400

Just so you know, I have about 5 different instruments here, i1pro, i1d2,
spy2, spy3, huey, dtp92, optix and a few others like CS-100 and PR-704. It's
very tempting to buy used and I most of my instruments were bought used.
But, whenever possible, financially, it's better to buy new. That way, any
measurement errors can be traced to the particularity of the instrument
itself and not the environment in which it was used previously, or the fact
that it might have drifted over time and it is due for a recalibration. I
have paid for recalibration on a few occasions and it was worth it. In your
case, a new Spyder3 would be a good investment. For all the hard work you're
putting in color managing your system.

New Spyder3pro can be have for as low as $150 US 
http://cgi.ebay.com/Brand-New-Colorvision-S3P100-Spyder3Pro-Spyder3-Pro_W0QQ
itemZ280489746195QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item414e7ddf13

That is pretty cheap compared to what Optix and other instruments used to
cost new, a few years ago.

Best / Roger

> -----Original Message-----
> From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-
> bounce@xxxxxxxxxxxxx] On Behalf Of Magnus Berg
> Sent: 11 avril 2010 08:38
> To: argyllcms@xxxxxxxxxxxxx
> Subject: [argyllcms] Re: Am I stupid or is it something else... my color
> management sucks.
> 
> 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.
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
> 
> 
> --
> ------------------------------------------------------------------------
> Magnus Berg
> 
> E-postadress            mailto://magnus@xxxxxxxxxxx
> Hemsida&  Blogg         http://www.magnus.burgsvik.se
> Bildarkiv               http://www.gotlandsbilden.se
> Gotlandsblogg         http://www.blogg.gotlandsbilden.se
> Telefon                 08-519 70 274 - 070-385 87 67
> Skype                   magnus_berg,burgsvik
> Postadress              Bäckströms väg 47 - 623 35 Burgsvik - SWEDEN
> ------------------------------------------------------------------------
> 
> 



Other related posts: