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Forum: Display Calibration   03-22-2015, 06:45 PM
Replies: 9
Views: 733
Posted By gwgill
ArgyllPRO ColorMeter V1.1 Released.

I'm pleased to announce the release of ArgyllPRO ColorMeter Version 1.1.

http://www.argyllpro.com.au

This version features greatly improved accessibility with the introduction of
application...
Forum: Display Calibration   03-19-2015, 06:57 PM
Replies: 139
Views: 4,084
Posted By gwgill
This doesn't necessarily follow. The problem...

This doesn't necessarily follow. The problem being discussed is observer variability, and it is something that is independent of the instrument being used.
Forum: Display Calibration   03-19-2015, 04:40 PM
Replies: 139
Views: 4,084
Posted By gwgill
Yes, for instance ArgyllCMS allows a selection of...

Yes, for instance ArgyllCMS allows a selection of observer Color Matching Curves.

Actually you can use other observer matching curves with the i1d3 if you have spectral samples for the display...
Forum: Display Calibration   03-19-2015, 04:25 PM
Replies: 11
Views: 286
Posted By gwgill
HCFR and ArgyllCMS/DiscalGUI will work with the...

HCFR and ArgyllCMS/DiscalGUI will work with the Spyder colorimeters from DataColor.
In my experience the Spyder4 is a notable improvement over the Spyder3, and some
people get good results from...
Forum: Display Calibration   03-19-2015, 04:13 PM
Replies: 139
Views: 4,084
Posted By gwgill
Right, and that software will (by default) use...

Right, and that software will (by default) use the 1931 observer color matching curves.
Forum: Display Calibration   03-18-2015, 09:06 PM
Replies: 139
Views: 4,084
Posted By gwgill
Right, but an emissive D65 reference (I'm not...

Right, but an emissive D65 reference (I'm not sure "card" is a good term, because the color of a reflective reference card depends on the illuminant used) is likely to be composed of a more broadband...
Forum: Display Calibration   03-18-2015, 06:09 AM
Replies: 139
Views: 4,084
Posted By gwgill
Right, which is why the model Fairchild used in...

Right, which is why the model Fairchild used in his CIC21 paper has 5 parameters, two of which are the M & L peak wavelength shifts.

(One of the interesting aspects is that the wavelength shifts...
Forum: Display Calibration   03-17-2015, 07:33 PM
Replies: 139
Views: 4,084
Posted By gwgill
Such a model exists, based on the CIE2006...

Such a model exists, based on the CIE2006 observer. See:

M.D. Fairchild and R.L. Heckaman, Metameric observers: A Monte Carlo approach, IS&T 21st Color
& Imaging Conference, Albuquerque, 185-190...
Forum: Display Calibration   03-03-2015, 08:41 PM
Replies: 9
Views: 733
Posted By gwgill
Yes, they show up in the Display Type...

Yes, they show up in the Display Type (http://www.argyllcms.com/pro/cmdoc/measurement_view.html#DisplayMode) spinner.

I'll be updating the app in the next week or so to fix some bugs & improve...
Forum: Display Calibration   03-03-2015, 04:38 PM
Replies: 9
Views: 733
Posted By gwgill
This is not a capability of the current version...

This is not a capability of the current version of ColorMeter, but of course you can create .ccmx and .ccss files using ArgyllCMS and DispcalGUI and uploading them to Colormeter. See here...
Forum: Display Calibration   03-03-2015, 04:32 PM
Replies: 16
Views: 980
Posted By gwgill
There's no harm in doing this, but no particular...

There's no harm in doing this, but no particular advantage either, unless you screen is noticeably non-uniform and you want to make sure that two meters are measuring exactly the same portion of the...
Forum: Display Calibration   03-03-2015, 04:20 PM
Replies: 16
Views: 980
Posted By gwgill
The type of light to frequency sensors used by...

The type of light to frequency sensors used by the i1d1, i1d2, i1d3, Spyder, Huey etc. are temperature compensated - that's one of the three reasons the manufacturers like using them. No temperature...
Forum: Display Calibration   03-02-2015, 03:37 AM
Replies: 9
Views: 733
Posted By gwgill
The current version depends on an external source...

The current version depends on an external source (i.e. a test disk, or some other signal generator you can use), if you want to measure or adjust TV/Video.

I do have in mind something to add...
Forum: Display Calibration   02-09-2015, 07:30 PM
Replies: 5,717
Views: 422,441
Posted By gwgill
Note that from the picture it's an NEC OEM...

Note that from the picture it's an NEC OEM version of the i1d3, and as such probably won't work with most of the software out there, unless it comes from NEC. It should work with ArgyllCMS, HCFR and...
Forum: Display Calibration   02-08-2015, 04:01 PM
Replies: 5,717
Views: 422,441
Posted By gwgill
The calibration is measuring the spectral...

The calibration is measuring the spectral characteristics of the colorimeter on that display, and that doesn't change with level. So the levels are irrelevant, as long as there are 3 or 4 (or more)...
Forum: Display Calibration   02-05-2015, 06:15 PM
Replies: 5,717
Views: 422,441
Posted By gwgill
Yes, it relays the fact that it is in the...

Yes, it relays the fact that it is in the Projector configuration, so that you know to point that part of it at the screen.
Forum: Display Calibration   02-05-2015, 02:23 PM
Replies: 5,717
Views: 422,441
Posted By gwgill
The ColorMunki Spectro has a separate Projector...

The ColorMunki Spectro has a separate Projector mode, and something like the i1pro Spectro has a "Beamer" holder, but with a lot of instruments emissive & tele end up being aliases.
Forum: Display Calibration   02-03-2015, 05:39 PM
Replies: 2
Views: 142
Posted By gwgill
You can make 3DLuts using ArgyllCMS + DispcalGUI,...

You can make 3DLuts using ArgyllCMS + DispcalGUI, but the Mac HCFR hasn't been maintained.

Two or three times someone has contacted me and asked "how can I help with developing HCFR ?"
and I...
Forum: Display Calibration   01-26-2015, 07:55 PM
Replies: 5,717
Views: 422,441
Posted By gwgill
It's not meant for you - it's meant to short...

It's not meant for you - it's meant to short circuit a lot of stuffing around in figuring out what went wrong. If the error message was just "something failed", then noone will be any the wiser about...
Forum: Display Calibration   01-19-2015, 02:27 PM
Replies: 331
Views: 21,978
Posted By gwgill
There is no difference between these two option...

There is no difference between these two option in regard to what happens with the white point - both assumed that you want input 255,255,255 mapped to 255,255,255, and that (somehow) your display...
Forum: Display Calibration   01-19-2015, 02:19 PM
Replies: 331
Views: 21,978
Posted By gwgill
They can be quite different. Relative will shift...

They can be quite different. Relative will shift the whole gamut of the input to match the output white points. Absolute does not attempt to match the white points, while the -w forces a local match...
Forum: Display Calibration   01-14-2015, 04:35 AM
Replies: 248
Views: 12,763
Posted By gwgill
Some added perspective: None of the current...

Some added perspective: None of the current research into observer functions indicates that the 1931 observer is "wrong", inaccurate" or especialy "bad" - it's an average of a small number of...
Forum: Display Calibration   01-11-2015, 04:44 PM
Replies: 7
Views: 235
Posted By gwgill
Spectrometers like the i1pro don't "miss" narrow...

Spectrometers like the i1pro don't "miss" narrow spectral spikes, since their filter bands overlap. All the energy of the spikes will be measured. But typically we're interested in how the measured...
Forum: Plasma Flat Panel Displays   01-07-2015, 09:35 PM
Replies: 4,117
Views: 358,856
Posted By gwgill
Anything better than 0.1 Hz accuracy is doing...

Anything better than 0.1 Hz accuracy is doing well. The ArgyllCMS i1d3 driver is randomly sampling the light, since (unlike an instrument like the Klein K10) it doesn't have a high speed sampling...
Forum: Display Calibration   01-06-2015, 09:43 PM
Replies: 5,717
Views: 422,441
Posted By gwgill
Initializing has little to do with calibration -...

Initializing has little to do with calibration - all hardware needs initializing when it's powered up.

"Calibration" is a much overloaded word, so it's better to be aware of that, and state what...
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