[argyllcms] Re: Awful result with Argyll 1.3.5 + dispcalGUI 0.8 + i1Display Pro & Dell U2711 :-(((

---> 1) dispcal -v -d 2 -A0.1 -P 0.5,0.5,2 -yl -g2.2 -b90 -t6500 -qh -Ibw -X /Library/color/WGCCFLFamily_07Feb11.ccss U2711_D65_G22_A01

Black = XYZ   0.13   0.14   0.26
Red   = XYZ  37.59  19.58   1.19
Green = XYZ  33.70  66.45   8.84
Blue  = XYZ  16.60   6.30  87.11
White = XYZ  85.33  89.98  98.20
patch 80 of 80
Had to scale brightness from 90.000000 to 89.197973 to fit within gamut,
corresponding to RGB 1.000000 0.992005 0.991198
Target white value is XYZ 84.780741 89.197973 97.082347
Adjusted target black XYZ 0.13 0.14 0.26, Lab 1.45 -0.12 -1.69
Target black after min adjust: XYZ 0.133 0.143 0.261, Lab 1.449 -0.125 -1.687
Gamma curve input offset = 0.000000, output offset = 0.001604, power = 2.208356
Total Iteration 4, Final Samples = 96 Final Repeat threshold = 0.400000
Creating initial calibration curves...
Doing iteration 1 with 12 sample points and repeat threshold of 1.131371 DE
patch 12 of 12
Brightness error = 0.486331 cd/m^2 (is 89.684304, should be 89.197973)
White point error = 0.612358 deltaE
Maximum neutral error (@ 0.485209) = 1.116182 deltaE
Average neutral error = 0.598239 deltaE
Number of measurements taken = 21
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 = 1.038719 cd/m^2 (is 90.236692, should be 89.197973)
White point error = 0.571080 deltaE
Maximum neutral error (@ 0.184578) = 0.836761 deltaE
Average neutral error = 0.517521 deltaE
Failed to meet target 0.800000 delta E, got worst case 0.836761
Number of measurements taken = 47
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 = 0.431898 cd/m^2 (is 89.629871, should be 89.197973)
White point error = 0.145325 deltaE
Maximum neutral error (@ 0.296838) = 0.770166 deltaE
Average neutral error = 0.407646 deltaE
Failed to meet target 0.565685 delta E, got worst case 0.836761
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 = 0.127642 cd/m^2 (is 89.325615, should be 89.197973)
White point error = 0.355310 deltaE
Maximum neutral error (@ 0.125777) = 0.927515 deltaE
Average neutral error = 0.357346 deltaE
Failed to meet target 0.400000 delta E, got worst case 1.070086
Number of measurements taken = 758

---> 2) dispread -v -d 2 -P 0.5,0.5,2 -yl -X /Library/color/WGCCFLFamily_07Feb11.ccss -Ibw -k "U2711_D65_G22_A01.cal" "U2711_D65_G22_A01"

(the test chart is the Massive LUT I saved from dispcalGUI, nothing changed)

---> 3) colprof -v -qh -aX -C "Created with dispcalGUI 0.8.1.9 and Argyll CMS 1.3.5" -M "DELL U2711" -A DEL -D "U2711_D65_G22_A01" "U2711_D65_G22_A01"

No of test patches = 2386
Estimating white point
Approximate White point XYZ = 0.957360 0.998272 1.111175, Lab = 99.933165 -0.897052 -20.995566
Creating optimised per channel curves
Initial White Point XYZ 0.957360 0.998272 1.111175, Lab 99.933165 -0.897052 -20.995566
[...]

Doing White point fine tune:
Before fine tune, rel WP = XYZ 0.964308 1.000338 0.825002, Lab 100.013085 -0.037735 0.014308
After fine tune, rel WP = XYZ 0.964200 1.000000 0.824900, Lab 99.999999 0.000001 -0.000004
Creating fast inverse input lookups
White point XYZ = 0.957463 0.998612 1.111307, Lab = 99.946299 -0.935752 -20.981700
Find black point
Black point XYZ = 0.001589 0.001681 0.002985, Lab = 1.518638 -0.131108 -3.018071
Display Luminance = 90.784896

[...]

Matrix = 0.403542 0.358106 0.184572
         0.208288 0.722210 0.067312
         0.010102 0.081156 1.003494
Input offset  = -0.111838 -0.010816 -0.051232
Output offset = 0.006501 0.001545 0.004508
gamma = 0.000000 14000873569461652575830640162194585685152335722185834802975035700186339336243838799520558759965272665807316337482849821460294766314592146904778858569073385617734634660612729208832.000000 -54050294267184342510129554449760256.000000
1 harmonics = 0.043894 0.039060 0.143366
2 harmonics = -0.041908 -0.025546 -0.059716
3 harmonics = 0.014177 0.010818 0.055536
4 harmonics = -0.033898 -0.007732 -0.035761
5 harmonics = -0.028711 -0.007659 0.011171
6 harmonics = -0.014042 0.011495 -0.002814
7 harmonics = -0.009377 0.004417 0.022419
8 harmonics = -0.021440 0.003307 -0.003021
9 harmonics = -0.032817 -0.001426 -0.010188
10 harmonics = -0.035891 -0.002015 -0.031408
11 harmonics = -0.037633 -0.008667 -0.031440
Find white & black points
Initial white point = 0.946220 0.997810 1.094751
Initial black point = 0.001400 0.001379 0.003035
Fixup matrix for white point
After white point adjust:
Matrix = 0.429574 0.390603 0.144022
         0.219152 0.726002 0.054845
         0.006933 0.068377 0.749590
Done gamma/shaper and matrix creation
Profile done
Profile check complete, peak err = 0.645786, avg err = 0.060380, RMS = 0.073486

------------------------------------------

I then copied the profile in colorsync folder and compared the gamut to the one I made with i1Profiler:

There's no point in testing the profile with profcheck: the gamut is almost the same as my MacBook Pro!

What did go wrong?

Regards,

Paolo

On 16/gen/2012, at 09:35, Graeme Gill wrote:

Hi,
sorry, but I've not seen anything in enough detail to be useful for
investigation. Yes, you've made a lot of qualitative comments, but without the
sort of concrete information I requested, it's impossible to track down where the
problem may be, since I'm not looking over your shoulder, or able to
run my own tests on your system.