AVS Forum - Search Results
Showing results 1 to 25 of 683
Search took 0.05 seconds.
Search: Posts Made By: gwgill
Forum: Display Calibration   12-23-2014, 06:53 PM
Replies: 19
Views: 707
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: 707
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: 707
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: 707
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: 707
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: 5,060
Views: 372,601
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: 312
Views: 19,521
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: 327
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: 5,060
Views: 372,601
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: 5,060
Views: 372,601
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: 1,039
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: 1,039
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: 312
Views: 19,521
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: 471
Views: 14,829
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: 471
Views: 14,829
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: 2,402
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: 471
Views: 14,829
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: 2,402
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...
Forum: Display Calibration   11-09-2014, 06:31 AM
Replies: 2,854
Views: 180,053
Posted By gwgill
This is certainly NOT recommended (see the...

This is certainly NOT recommended (see the ArgyllCMS tutorial). Leave the buttons alone (ie. don't override), and let ArgyllCMS manage the VideoLUT and 3DLut state during calibration and profiling.
Forum: Display Calibration   11-09-2014, 06:25 AM
Replies: 69
Views: 3,162
Posted By gwgill
I have to agree that in general, it's going to be...

I have to agree that in general, it's going to be hard to distinguish between DE 3 and DE 0.7 - to reliably do so, typically requires side by side comparison. Under side by side conditions when...
Forum: Display Calibration   11-09-2014, 06:14 AM
Replies: 471
Views: 14,829
Posted By gwgill
On having some time to think about this, I would...

On having some time to think about this, I would guess that the answer is that the instruments spectral sensitivity is so close to the standard observer in the blue, that there is no scope to modify...
Forum: Display Calibration   11-08-2014, 11:04 PM
Replies: 471
Views: 14,829
Posted By gwgill
That seems unlikely. That is the reason it...

That seems unlikely.

That is the reason it doesn't weight things like the ccmx code does - to match the behaviour of the OEM driver. I'm reluctant to meddle with it.
Forum: Display Calibration   11-08-2014, 11:01 PM
Replies: 471
Views: 14,829
Posted By gwgill
No, because a .ccss is the spectral samples. The...

No, because a .ccss is the spectral samples. The code for converting this to a matrix is in the particular intstrument drivers (ie. specto/i1d3.c, spectro/spyd2.c).

The function i1d3_comp_calmat()...
Forum: Display Calibration   11-08-2014, 08:28 AM
Replies: 471
Views: 14,829
Posted By gwgill
Errors in L* are de-weighted by a factor of 5,...

Errors in L* are de-weighted by a factor of 5, and white patch is set to be 1/4 the weight of the sum of all the other patches. Note that the matrix is set to minimize the sum of the DeltaE94 errors...
Forum: Display Calibration   11-08-2014, 04:08 AM
Replies: 471
Views: 14,829
Posted By gwgill
They use different drivers, so they are...

They use different drivers, so they are different. Having compared the readings of a K10 vs. i1d3 using the ArgyllCMS drivers and found very good agreement, I don't think any discrepancies between...
Showing results 1 to 25 of 683

 
Forum Jump: