[argyllcms] Re: Problem with 1.1.0 RC2 ?

  • From: andrzej duda <desdaa@xxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Fri, 11 Dec 2009 20:18:38 +0100


It's possibly a warm up issue with the instrument and/or display.
Try allowing the instrument to acclimatize on the screen for a while
(half an hour ?) before (possibly) recalibrating the instrument
and commencing calibration again.

I did and nothing changed.
So I've tried to "experiment" with calibration settings.
Changing k1 to k0 had little effect but f1 k0 A20 gave
LUT curves with no color hue in the dark grays.
Was it f1 or A20 I can't say.


And it took much less time to calibrate, which is a real bonus.
For the first time max. neutral errors stayed small.

patch 12 of 12
Brightness error = 0.211194 cd/m^2
White point error = 0.273996 deltaE
Maximum neutral error (@ 0.125074) = 1.082603 deltaE
Average neutral error = 0.756210 deltaE
Number of measurements taken = 18
Computing update to calibration curves...
Doing iteration 2 with 24 sample points and repeat threshold of 0.800000 DE
patch 24 of 24
Brightness error = 0.097356 cd/m^2
White point error = 0.303758 deltaE
Maximum neutral error (@ 0.559535) = 0.794418 deltaE
Average neutral error = 0.559808 deltaE
Number of measurements taken = 40
Computing update to calibration curves...
Doing iteration 3 with 48 sample points and repeat threshold of 0.565685 DE
patch 48 of 48
Brightness error = 0.081890 cd/m^2
White point error = 0.321508 deltaE
Maximum neutral error (@ 0.012247) = 0.804707 deltaE
Average neutral error = 0.396902 deltaE
Failed to meet target 0.565685 delta E, got worst case 0.804707
Number of measurements taken = 184
Computing update to calibration curves...
Doing iteration 4 with 96 sample points and repeat threshold of 0.400000 DE
patch 96 of 96
Brightness error = 0.168971 cd/m^2
White point error = 0.342762 deltaE
Maximum neutral error (@ 0.002076) = 0.575765 deltaE
Average neutral error = 0.308650 deltaE
Failed to meet target 0.400000 delta E, got worst case 0.804707
Number of measurements taken = 445
The instrument can be removed from the screen.
Written calibration file 'T966 A D65 Cd100 G2.2 B 11-12.cal'


Regards
Andrzej Duda

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