[argyllcms] Re: Is the i1D3 (ColorMunki Display) accurate?
- From: Claas Bickeböller <lists@xxxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 27 Jul 2012 13:47:09 +0200
Dear Stephen,
maybe this report gives you an idea of the interinstrument and intermodel
disagreement you can expect from typical low cost sensors.
http://www.fogra.org/dokumente/upload/6297b_dis_aymeasurement_intermediate_reportv3.pdf
Best regards
Claas
Am 27.07.2012 um 13:28 schrieb Stephen T:
> The i1D2 is less than two years old. I've kept it well stored, with silica
> gel desiccant.
>
> Stephen.
>
> From: "János, Tóth F." <janos666@xxxxxxxxxx>
> To: argyllcms@xxxxxxxxxxxxx
> Sent: Friday, 27 July 2012 8:27 PM
> Subject: [argyllcms] Re: Is the i1D3 (ColorMunki Display) accurate?
>
> How old is your i1d2?
>
> 2012/7/27 Stephen T <stwebvanuatu@xxxxxxxxxxxx>
> Hello Janos,
>
> Thankyou for your constructive advice.
>
> There are two issues: 1) accuracy and 2) unit-to-unit variability:
>
> http://www.drycreekphoto.com/Learn/Calibration/MonitorCalibrationHardware.html
>
>
> OEM i1D2 variability DE00 = 4 - 7, average white point accuracy DE00 = 2 - 4
> i1D3 variability DE00 = 0.4 - 2, average white point accuracy DE00 = 2 - 3
>
> In the worst case, any two instruments might disagree by DE00 = 2 + 7 = 9.
> My results show a difference of DE00 = 12.
> I also measured white patches with spotread and calculate DE94 = 14.
> I suppose that luminance measurements are fairly robust and my i1D3 does
> appear to be an odd unit in two tests.
>
> I think my i1D3 is measuring out of tolerance?
> Has anyone else experienced similar and have they measured the difference?
>
> I'm not throwing my Spyder2 in the bin just yet.
>
> Stephen.
>
> From: "János, Tóth F." <janos666@xxxxxxxxxx>
> To: argyllcms@xxxxxxxxxxxxx
> Sent: Friday, 27 July 2012 7:00 AM
> Subject: [argyllcms] Re: Is the i1D3 (ColorMunki Display) accurate?
>
> I think you bought a new sensor because you believed it's better than your
> old. Didn't you?
>
> The i1d3 is more accurate in theory. The hardware is better, the corrections
> are smarter.
> Of yourse, it's not "perfect". (Neither any other relatively cheap
> instruments are.) But I guess you will be happy with the i1d3 if the i1d2 was
> good enough for your needs.
>
> 2012/7/26 Stephen T <stwebvanuatu@xxxxxxxxxxxx>
> Hello,
>
> I received my ColorMunki display this week and have been doing some
> comparisons. It gives different readings to my OEM i1D2.
>
> I calibrated my wide gamut NEC P221W display with X-Rite's ColorMunki Display
> software and the following settings:
> native white point (hardware setting), D65, gamma = 2.2, brightness 120 cd/m2
> (adjusted in hardware), WGCCFL display type (under preferences!), no ambient
> adjustment, no flare correction.
>
> I then measured the response in Argyll CMS v1.4.0 with the profile loaded in
> Windows 7. I measured with two instruments: ColorMunki Display and NEC
> MDSVSENSOR (OEM i1D2). I also measured without the CCSS matrix. The profile
> was good when measured with the i1D3 and so I believe Argyll CMS is not at
> fault. The profile was inaccurate when tested with the i1D2.
>
> Are the i1D3 generic correction matrices accurate? My MDSVSENSOR suggests the
> white point DE00 = 12 and brightness is 8 cd/m2 brighter.
>
> Has anyone else tested the accuracy of the i1D3 against other instruments,
> especially spectrophotometer?
>
> Are the generic correction matrices accurate for some display technologies
> and inaccurate for others? I assume the MDSVSENSOR is accurate for wide gamut
> NEC displays. I bought the ColorMunki Display mainly for standard gamut CCFL
> and WLED displays and now I am hesitant to use it!
>
> Maybe one of my colorimeters is faulty?
>
> Stephen.
>
> Here are the results:
>
> i1D3 + CCSS
> ----------- ---
>
> C:\Users\Stephen>dispcal -d 1 -y l -X WGCCFLFamily_07Feb11.ccss -r -P
> 0.5,0.5,2.0
> Place instrument on test window.
> Hit Esc or Q to give up, any other key to continue:
> Current calibration response:
> Black level = 0.12 cd/m^2
> White level = 119.57 cd/m^2
> Aprox. gamma = 2.18
> Contrast ratio = 1004:1
> White chromaticity coordinates 0.3108, 0.3274
> White Correlated Color Temperature = 6622K, DE 2K to locus = 4.8
> White Correlated Daylight Temperature = 6622K, DE 2K to locus = 0.2
> White Visual Color Temperature = 6442K, DE 2K to locus = 4.6
> White Visual Daylight Temperature = 6614K, DE 2K to locus = 0.2
> The instrument can be removed from the screen.
>
> OEM i1D2 (NEC MDSVSENSOR)
> ------------------------- ------------
>
> C:\Users\Stephen>dispcal -d 1 -y l -r -P 0.5,0.5,2.0
> Place instrument on test window.
> Hit Esc or Q to give up, any other key to continue:
> Current calibration response:
> Black level = 0.12 cd/m^2
> White level = 127.53 cd/m^2
> Aprox. gamma = 2.17
> Contrast ratio = 1026:1
> White chromaticity coordinates 0.3135, 0.3503
> White Correlated Color Temperature = 6328K, DE 2K to locus = 14.4
> White Correlated Daylight Temperature = 6321K, DE 2K to locus = 12.0
> White Visual Color Temperature = 5810K, DE 2K to locus = 14.1
> White Visual Daylight Temperature = 5924K, DE 2K to locus = 11.6
> The instrument can be removed from the screen.
>
> i1D3
> -----
>
> C:\Users\Stephen>dispcal -d 1 -y l -r -P 0.5,0.5,2.0
> Place instrument on test window.
> Hit Esc or Q to give up, any other key to continue:
> Current calibration response:
> Black level = 0.12 cd/m^2
> White level = 118.54 cd/m^2
> Aprox. gamma = 2.17
> Contrast ratio = 1002:1
> White chromaticity coordinates 0.3013, 0.3325
> White Correlated Color Temperature = 7100K, DE 2K to locus = 12.4
> White Correlated Daylight Temperature = 7090K, DE 2K to locus = 9.6
> White Visual Color Temperature = 6517K, DE 2K to locus = 12.0
> White Visual Daylight Temperature = 6666K, DE 2K to locus = 9.3
> The instrument can be removed from the screen.
>
>
>
>
>
>
>
>
Other related posts:
