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Forum: Display Calibration   01-26-2015, 08:55 PM
Replies: 5,337
Views: 391,709
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, 03:27 PM
Replies: 324
Views: 20,611
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, 03:19 PM
Replies: 324
Views: 20,611
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, 05:35 AM
Replies: 180
Views: 9,003
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, 05:44 PM
Replies: 7
Views: 195
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, 10:35 PM
Replies: 3,970
Views: 335,246
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, 10:43 PM
Replies: 5,337
Views: 391,709
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...
Forum: Display Calibration   12-23-2014, 06:53 PM
Replies: 19
Views: 798
Posted By gwgill
Yes, there's not much point in doing that. All...

Yes, there's not much point in doing that. All the current ArgyllCMS utilities should
convert such files to a common form when comparing such, though.

Sorry, it's not clear what you mean by...
Forum: Display Calibration   12-21-2014, 07:19 PM
Replies: 19
Views: 798
Posted By gwgill
It's just a backwards compatibility flag for the...

It's just a backwards compatibility flag for the ArgyllCMS .ti3 file format. Up to date code will cope with both formats,
so it should make no difference to your results. It can be useful though to...
Forum: Display Calibration   12-15-2014, 09:21 PM
Replies: 19
Views: 798
Posted By gwgill
The 1211 seems pretty fast for a spectrometer. ...

The 1211 seems pretty fast for a spectrometer.

Yes, you can create a matrix/ccss manually. You use dispread with the two instruments and the ccxx.ti1 file provided in the ArgyllCMS ref directory,...
Forum: Display Calibration   12-15-2014, 04:04 PM
Replies: 19
Views: 798
Posted By gwgill
That a problem with web forums - since they rely...

That a problem with web forums - since they rely on manual checking, threads easily peter out.
You are much better off emailing me or posting on the ArgyllCMS mailing list.

I fixed an occasional ...
Forum: Display Calibration   12-15-2014, 03:31 PM
Replies: 19
Views: 798
Posted By gwgill
Why do you want to do that ? The JETI 1211...

Why do you want to do that ?

The JETI 1211 is supported by ArgyllCMS - use ccxxmake or DispcalGUI directly.
Forum: Display Calibration   12-15-2014, 03:28 PM
Replies: 5,337
Views: 391,709
Posted By gwgill
That will happen if you are not using an...

That will happen if you are not using an appropriate calibration for your display type. I could locate no credible reports of ArgyllCMS/HCFR id13 measurements being less accurate than with any other...
Forum: Display Calibration   12-09-2014, 08:11 PM
Replies: 324
Views: 20,611
Posted By gwgill
It's an update to address a serious problem with...

It's an update to address a serious problem with illumread. Unless you are profiling printers using FWA (Fluorescent Whitener Additive) compensation, I doubt it's of any interest.

Only if you...
Forum: Display Calibration   12-09-2014, 03:52 PM
Replies: 4
Views: 341
Posted By gwgill
I know ftL are still very popular in the U.S.A.,...

I know ftL are still very popular in the U.S.A., but really you are better off getting into the habit of using modern scientific units when you are able, ie. cd/m^2.

Modern standards use the...
Forum: Display Calibration   11-26-2014, 03:52 PM
Replies: 5,337
Views: 391,709
Posted By gwgill
It seems like one user [ Maxes ] started this...

It seems like one user [ Maxes ] started this idea, and then another [ Nudgiator ] takes that and repeats it later as fact. See the start of the discussion...
Forum: Display Calibration   11-26-2014, 03:25 PM
Replies: 5,337
Views: 391,709
Posted By gwgill
Nothing like that has been reported to me w.r.t...

Nothing like that has been reported to me w.r.t ArgyllCMS's i1d3 driver. If you have a specific example, then please point to it.
Forum: Display Calibration   11-24-2014, 11:24 PM
Replies: 18
Views: 1,116
Posted By gwgill
Instruments typically used for Video profiling...

Instruments typically used for Video profiling and calibration are not laboratory instruments, they are field instruments, and the price and portability reflects this. But even laboratory instruments...
Forum: Display Calibration   11-24-2014, 05:28 PM
Replies: 18
Views: 1,116
Posted By gwgill
They are physical devices, and stuff can happen...

They are physical devices, and stuff can happen to them. A knock for instance, could shift the position the light strikes the diffraction grating, shifting the wavelength calibration - that's why...
Forum: Display Calibration   11-18-2014, 02:45 PM
Replies: 324
Views: 20,611
Posted By gwgill
Nothing of significance. With the help of some...

Nothing of significance. With the help of some others, I've been working on a new feature, but it isn't finished yet. When it's done, I'll do a V1.7 release.
Forum: Display Calibration   11-16-2014, 05:21 PM
Replies: 481
Views: 15,897
Posted By gwgill
The i1d3 is not calibrated from your i1pro - it's...

The i1d3 is not calibrated from your i1pro - it's calibrated through an intermediate reference to a CS2000 and a different display to the one you have. So it's unlikely they would exactly match - the...
Forum: Display Calibration   11-13-2014, 05:20 PM
Replies: 481
Views: 15,897
Posted By gwgill
Well they will, if the colorimeter is given a...

Well they will, if the colorimeter is given a correction matrix made using the spectrometer.

The coloromiter filters are not a perfect match to the standard observer CMF, hence the mismatch.
Even...
Forum: Display Calibration   11-12-2014, 10:29 PM
Replies: 60
Views: 2,582
Posted By gwgill
Charles got it wrong here - there are not two...

Charles got it wrong here - there are not two knobs, and the standard does say how to set the values he calls knobs.
Forum: Display Calibration   11-12-2014, 10:23 PM
Replies: 481
Views: 15,897
Posted By gwgill
That means you are a color normal observer, and...

That means you are a color normal observer, and can discriminate between different colors well. It doesn't mean that your spectral responses are the same as the CIE standard observer.
Forum: Display Calibration   11-12-2014, 12:13 PM
Replies: 60
Views: 2,582
Posted By gwgill
Because encoding is deliberately different to...

Because encoding is deliberately different to decoding. Video is encoded with an (aprox.) 2.2 gamma with the intention of it being decoded with a 2.4 gamma. The difference takes account of dim...
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