[argyllcms] Target Black problems with ColorMunki & NEC 3090
- From: David Heinrich <dh003i@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Thu, 9 Dec 2010 23:13:54 -0500
I'm using the ColorMunk Photo to try to calibrate a NEC LCD3090WQXi-BK
LCD (http://snipurl.com/nec3090). After running
sudo ./dispcal -yl -P 0.5,0.5,2 -a 58.7 -B 100 -t 5000 -T 5000 -v -o TargetA
I do the following, and get the results below (I omit the menu screen,
and just show results). The target black is way off (see results
during calibration, and at check all step). When I adjust the offsets
on my LCD, it seems to have little effect on the DE for adjusting the
black point. My monitor also has more than just RGB offset controls;
for the offset controls, it has red, yellow, green, cyan, blue, and
magenta controls.
Because of the large DE, I did not proceed to calibration.
Any suggestions?
**Black level adjustment**
Adjust CRT brightness to get target level. Press space when done.
Target 1.54
/ Current 1.55 -
**White point adjustment**
Doing some initial measurements
Red = XYZ 112.11 51.19 1.29
Green = XYZ 32.47 112.45 16.99
Blue = XYZ 24.66 9.07 130.81
White = XYZ 169.22 172.74 149.94
Adjust R,G & B gain to get target x,y. Press space when done.
Target Br 172.74, x 0.3451 , y 0.3516
\ Current Br 171.06, x 0.3449+, y 0.3515+ DE 0.1 R= G= B=
**White Level Adjustment**
White = XYZ 167.80 171.01 147.73
Adjust CRT Contrast or LCD Brightness to desired level. Press space when done.
Initial 171.01
\ Current 171.02
**Black point adjustment**
Black = XYZ 0.00 0.00 0.00
Grey = XYZ 36.01 36.78 31.72
White = XYZ 168.29 171.51 148.11
Adjust R,G & B offsets to get target x,y. Press space when done.
Target Br 1.72, x 0.3451 , y 0.3516
\ Current Br 1.26, x 0.3725-, y 0.3873- DE 14.5 R- G- B++
**Check all**
Black = XYZ 0.00 0.00 0.00
Grey = XYZ 35.71 36.50 31.48
White = XYZ 167.52 170.96 148.22
1% = XYZ 1.22 1.27 0.80
Current Brightness = 170.96
Target 50% Level = 32.39, Current = 36.50, error = 2.4%
Target Near Black = 1.71, Current = 1.27, error = -0.3%
Target white = x 0.3451, y 0.3516, Current = x 0.3442, y 0.3513,
error = 0.53 DE
Target black = x 0.3451, y 0.3516, Current = x 0.3718, y 0.3866,
error = 14.25 DE
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