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Search: Posts Made By: gwgill
Forum: Display Calibration   05-06-2015, 08:07 AM
Replies: 50
Views: 544
Posted By gwgill
I've tried that approach (with a different...

I've tried that approach (with a different instrument), and it doesn't work, or would take far too long because what you are trying to detect is buried in measurement noise.
Forum: Display Calibration   05-06-2015, 08:03 AM
Replies: 50
Views: 544
Posted By gwgill
There's no point in adding support unless I can...

There's no point in adding support unless I can regression test (i.e. trying to debug or confirm functionality remotely makes it an unreasonably hard task). I would be surprised if an SDK covers the...
Forum: Display Calibration   05-06-2015, 02:41 AM
Replies: 50
Views: 544
Posted By gwgill
Not at the moment - I need to have access to a...

Not at the moment - I need to have access to a meter in order to add support for it.
Forum: Display Calibration   05-06-2015, 02:40 AM
Replies: 50
Views: 544
Posted By gwgill
Yes, it should work OK. Note that the...

Yes, it should work OK. Note that the synchronization rate should be fine if it is a sub-multiple of the actual display refresh rate - the important thing is to start and stop the measurement...
Forum: Display Calibration   05-05-2015, 07:15 PM
Replies: 50
Views: 544
Posted By gwgill
That would be due to the Nyquist Sampling limit...

That would be due to the Nyquist Sampling limit (http://en.wikipedia.org/wiki/Nyquist_frequency).

Although Fourier analysis will reveal the refresh rate as well as a lot of other information when...
Forum: Display Calibration   05-05-2015, 05:32 PM
Replies: 4
Views: 140
Posted By gwgill
He currently works at Photo Research.

He currently works at Photo Research.
Forum: Display Calibration   05-04-2015, 05:31 AM
Replies: 340
Views: 22,643
Posted By gwgill
OK - that shouldn't happen, but the warning is...

OK - that shouldn't happen, but the warning is benign. I'll fix it in V1.7.1.
Forum: Display Calibration   05-03-2015, 03:52 PM
Replies: 340
Views: 22,643
Posted By gwgill
Precisely what was the warning message ?

Precisely what was the warning message ?
Forum: Display Calibration   05-03-2015, 03:47 PM
Replies: 352
Views: 12,086
Posted By gwgill
As with all instruments, there is a tradeoff...

As with all instruments, there is a tradeoff between speed and accuracy at low light levels. By default the ArgyllCMS driver uses adaptive integration time for most instruments where it makes sense...
Forum: Display Calibration   05-01-2015, 12:59 AM
Replies: 3
Views: 247
Posted By gwgill
ArgyllCMS V1.7.0 has been released

I'm very pleased to announce the release of ArgyllCMS V1.7.0.

The highlights in this release are:


Support for DataColor Spyder 5 & Klein K10-A colorimeter.
Added Google ChromeCast as a...
Forum: Display Calibration   04-29-2015, 07:24 PM
Replies: 708
Views: 28,022
Posted By gwgill
It's actually the 1D input/output curves that...

It's actually the 1D input/output curves that take a lot of the time - the core fitting is quite fast on modern hardware compared to when I first wrote it. The inverted lookup during linking is quite...
Forum: Display Calibration   04-26-2015, 05:37 PM
Replies: 3,483
Views: 210,561
Posted By gwgill
Either way, the the version isn't returned, even...

Either way, the the version isn't returned, even though MadTPG is running fine.

The .dll doesn't seem to have a DllGetVersion() entry either, which seems to be the standard way of getting the DLL...
Forum: Display Calibration   04-26-2015, 04:47 PM
Replies: 3,483
Views: 210,561
Posted By gwgill
Hmm. I couldn't get this code working -...

Hmm. I couldn't get this code working - GetFileVersionInfoSizeW() returns 0. I'm not sure the approach is correct either, since
the code for loading the library looks through the registry to locate...
Forum: Display Calibration   04-17-2015, 01:00 AM
Replies: 59
Views: 1,311
Posted By gwgill
It depends on the operating mode. A certain fixed...

It depends on the operating mode. A certain fixed integration time will give a limit of 300 cd/m^2. Smaller times will set higher limits, but give less sensitivity for lower light levels. So an...
Forum: Display Calibration   04-16-2015, 10:44 PM
Replies: 59
Views: 1,311
Posted By gwgill
That's not what I get. Quick trial with an i1pro...

That's not what I get. Quick trial with an i1pro Rev A under my desk lamp :- 5473 cd/m^2 in auto-ranging emissive mode - i.e. the instrument is not inherently limited to 300 cd/m^2.
Forum: Display Calibration   04-03-2015, 05:08 PM
Replies: 3,483
Views: 210,561
Posted By gwgill
If the profiling and linking is working...

If the profiling and linking is working correctly, then transitions like that are symptoms of non-monotonicity (reversals) in the apparent display behavour. If it is not a problem with the display...
Forum: Display Calibration   04-03-2015, 04:54 PM
Replies: 3,483
Views: 210,561
Posted By gwgill
It's hard off hand to know if the first step...

It's hard off hand to know if the first step above black should be visible or not, since it depends on a lot of factors. A power curve is extremely shallow near zero, and there is no surprise if a...
Forum: Display Calibration   04-03-2015, 03:58 PM
Replies: 3,483
Views: 210,561
Posted By gwgill
See my previous post.

See my previous post.
Forum: Display Calibration   04-03-2015, 04:34 AM
Replies: 3,483
Views: 210,561
Posted By gwgill
What has changed since it was last working well...

What has changed since it was last working well for you ?
Forum: Display Calibration   04-03-2015, 04:33 AM
Replies: 3,483
Views: 210,561
Posted By gwgill
If you email me your dispcal command line, .cal...

If you email me your dispcal command line, .cal file, colprof command line & .ti3 file, and your collink command line, I'll look into it.
Forum: Display Calibration   04-03-2015, 02:01 AM
Replies: 3,483
Views: 210,561
Posted By gwgill
By default an ArgyllCMS calibration and/or...

By default an ArgyllCMS calibration and/or profile will account for that. (A calibration will have finer capability to compensate.) Of course if you override the default and force the black to be 0...
Forum: Display Calibration   04-02-2015, 05:27 PM
Replies: 3,483
Views: 210,561
Posted By gwgill
If a BT.1886 style input offset is visually...

If a BT.1886 style input offset is visually desirable, then it sounds like a viewing environment issue where the observer black level is higher than the black measured directly from the screen. So...
Forum: Display Calibration   04-02-2015, 05:02 PM
Replies: 3,483
Views: 210,561
Posted By gwgill
Why is it needed though ? If TV black is so low...

Why is it needed though ?
If TV black is so low that the i1d3 is reading 0, then why not just run with that ?
What problem is caused by the difference between 0 and 0.001 cd/m^2 ?
Forum: Display Calibration   03-22-2015, 06:45 PM
Replies: 9
Views: 772
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: 227
Views: 6,980
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.
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