[argyllcms] Re: More comparisons of i1D3
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 27 Jul 2012 12:36:09 +1000
Stephen T wrote:
> I have checked my i1D3 (ColorMunki Display) on another display and versus
> another colorimeter. The display is a Dell 2209WA (standard gamut CCFL)
> calibrated in May 2012 with Spyder2, D65 white point, sRGB gamma, 120 cd/m2.
>
> Today I measured the display response with both Spyder2 and i1D3. Similar to
> my previous comparison:
> * The i1D3 is reading a lower white level, -11 cd/m2.
> * The i1D3 is reading a higher colour temperature, +300 K.
>
> And yes, the Spyder2 reports an elevated black level (which is why I bought a
> new colorimeter).
>
> It seems the i1D3 is the odd one out. Maybe I should contact X-Rite?
Hi,
there's really little point comparing one consumer level colorimeter
against another in an attempt to decide which is more accurate. Consumer level
colorimeters are notoriously inaccurate, the only exception being the i1d3 and
Discus.
See
<http://www.drycreekphoto.com/Learn/Calibration/MonitorCalibrationHardware.html>
and <http://www.drycreekphoto.com/Learn/Calibration/Details/Discus_v_i1D3.html>.
The sort of measurement differences between such instruments are not at all
unusual,
and the absolute level calibration is also notoriously variable.
That doesn't guarantee that you don't have a faulty unit, but you need
to be comparing it to something that is likely to be more accurate
such as an laboratory grade colorimeter or spectrometer.
Something to consider:
------------------------------------------------------------------------------------------------
Sanity check instrument display calibration.
24/2/2012, 29/5/2012 using Hitachi CRT display.
Spectrolino 1 Argyll XYZ: 30.342257 32.210918 30.288643, D50 Lab: 63.516824
-2.652536 -6.117355
Spectrolino 2 Argyll Erratic on emissive.
i1pro 1 RevD Argyll XYZ: 30.366075 32.046553 29.537272, D50 Lab: 63.381341
-1.979590 -5.156768
i1pro 2 RevA Argyll XYZ: 29.645006 31.465500 29.792738, D50 Lab: 62.898644
-2.613233 -6.397275
i1pro 3 RevA Argyll XYZ: 28.658998 30.421805 28.095164, D50 Lab: 62.016473
-2.594479 -5.160003
i1pro2 4 RevE Argyll XYZ: 33.200147 35.438440 31.381255, D50 Lab: 66.088601
-3.378915 -3.385039
ColorMunki Argyll XYZ: 33.601742 35.353924 32.902999, D50 Lab: 66.023292
-1.690026 -5.803213
DTP92 XYZ: 32.560000 32.680000 32.480000, D50 Lab: 63.900961
3.783532 -8.828784
DTP94 -yc XYZ: 33.610000 35.010000 33.200000, D50 Lab: 65.756450
-0.511025 -6.704930
Huey -yc Argyll XYZ: 34.413691 36.916173 31.049601, D50 Lab: 67.214092
-4.011221 -0.932207
i1Disply2 -yc Argyll XYZ: 32.683683 36.384672 32.275287, D50 Lab: 66.812802
-8.327188 -3.499750
i1d3 -yr Gen Argyll XYZ: 35.798202 37.389382 35.967729, D50 Lab: 67.568143
-0.843403 -7.575661
i1d3 -yr Gen Manf. XYZ: 35.555296 37.183315 35.756092, D50 Lab: 67.414335
-0.995098 -7.542806
CM Dsply Gen Argyll XYZ: 35.961019 37.196757 35.753603, D50 Lab: 67.424385
0.320237 -7.521965
CM Dsply Gen Manf. XYZ: 35.888645 37.082936 35.653985, D50 Lab: 67.339206
0.445779 -7.528122
Spyder 2 -yc Argyll XYZ: 36.389622 35.398223 39.719250, D50 Lab: 66.057537
7.636040 -15.279558
Spyder 3 -yr Argyll XYZ: 35.723264 36.436912 32.424118, D50 Lab: 66.852416
1.990694 -3.655952
Spyder 4 -yr Argyll XYZ: 33.665766 36.001103 33.365360, D50 Lab: 66.520767
-3.610985 -5.631894
Spyder 4 Gen Manf. XYZ: 33.444 35.800 32.937 D50 Lab: 66.366826
-3.722237 -5.261606
------------------------------------------------------------------------------------------------
(Note the i1pro RevE is in legacy mode, and the color being measured may not
be identical to that for the other measurements. Note that some of the
differences may be due to display positioning differences and reading to
reading randomness. This is just a sanity check, but is indicative of
instrument to instrument differences.)
Graeme Gill.
Other related posts:
