[argyllcms] Re: White point or black point adjustment not working
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Mon, 20 Jul 2009 09:56:02 +1000
George Willegers wrote:
After just doing 2 and 3 I now have the following (apart from white
looking like pink):
Black = XYZ 0.25 0.20 0.29
Grey = XYZ 24.66 26.08 29.56
White = XYZ 113.08 119.22 137.37
1% = XYZ 1.58 1.65 1.99
Current Brightness = 119.22
Target 50% Level = 22.59, Current = 26.08, error = 2.9%
Target Near Black = 1.19, Current = 1.73, error = 0.5%
Current white = x 0.3059, y 0.3225, VDT 6941K DE 0.3
Target black = x 0.3059, y 0.3225, Current = x 0.3028, y 0.3160, error
= 3.65 DE
It's a puzzle a to why it should look pink. According to the
instrument, it is quite blue (approx. 7000K white point), and
very close to the daylight locus (0.3 delta E), which is the
reference for neutrality. Either something is wrong with
the instrument, or environmental factors are influencing the
subjective impression.
When adjusting the white point, it started with R+ G-- B+. After
decreasing the green level a bit this changed into the reverse (R- G++
B-), sometimes changing into R= G= B= without touching the monitor
controls. I still think this is odd.
Why do you think this is odd ? The real world has noise and non-repeatability
in it.
Graeme Gill.
Other related posts:
