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Search: Keyword(s): ; Posts Made By: gwgill
Forum: Display Calibration   02-10-2016, 03:38 PM
Replies: 5
Views: 98
Posted By gwgill
You need to follow the installation instructions...

You need to follow the installation instructions in order to switch from the Manufactures drivers to the ArgyllCMS drivers that DisplayCAL and HCFR use, if you want your Spyder 5 to connect.
Forum: Display Calibration   02-01-2016, 03:47 AM
Replies: 8
Views: 252
Posted By gwgill
ArgyllCMS + DispcalGUI

ArgyllCMS + DispcalGUI
Forum: Display Calibration   01-17-2016, 05:54 PM
Replies: 29
Views: 699
Posted By gwgill
You select a display calibration that you think...

You select a display calibration that you think best fits your display. How do you know it is a good match ? - i.e. what technical justification have you got ?

They only have to be "lucky" once -...
Forum: Display Calibration   01-17-2016, 05:00 PM
Replies: 29
Views: 699
Posted By gwgill
It's about confidence.

Here are my thoughts on i1d3 vs. ColorMunki Spectro/i1Pro Spectro accuracy:

There is no doubt that at its best, an i1d3 is going to be more accurate than a graphic arts type spectro.
"At its...
Forum: Display Calibration   01-15-2016, 07:01 PM
Replies: 573
Views: 30,427
Posted By gwgill
Sorry - yes, you are quite right.

Sorry - yes, you are quite right.
Forum: Display Calibration   01-15-2016, 06:00 PM
Replies: 573
Views: 30,427
Posted By gwgill
DispcalGUI shouldn't be using the colprof -f flag...

DispcalGUI shouldn't be using the colprof -f flag for a display - it's only applicable to print profiling.
Yes, I probably added this warning message in V1.8.3. The flag will be ignored.
Forum: Display Calibration   01-13-2016, 06:06 AM
Replies: 402
Views: 12,443
Posted By gwgill
"Ambient" is really a lay term for measuring...

"Ambient" is really a lay term for measuring light falling on the sensor that comes from all directions, rather than just light coming from one direction. Technically the former is Illuminance and is...
Forum: Display Calibration   01-11-2016, 11:17 PM
Replies: 131
Views: 4,125
Posted By gwgill
And the connection completely escapes me....

And the connection completely escapes me. CIECAM02 has nothing to do with automated scene recognition or analysis. It is instead to do with modeling the way our color perception is influenced by the...
Forum: Display Calibration   01-11-2016, 04:59 AM
Replies: 131
Views: 4,125
Posted By gwgill
It seems to me that the only reason they have...

It seems to me that the only reason they have this problem is the assumption of an absolute HDR encoding standard (ST2084).

If instead they used something sensible, the problem would vanish.
Forum: Display Calibration   01-11-2016, 12:08 AM
Replies: 131
Views: 4,125
Posted By gwgill
That's one of the issues with wide gamut that...

That's one of the issues with wide gamut that many people are blissfully ignorant about. If your display gamut is noticably smaller that the source colorspace, but your source media doesn't actually...
Forum: Display Calibration   01-10-2016, 11:51 PM
Replies: 131
Views: 4,125
Posted By gwgill
Right - but peak brightness is a secondary...

Right - but peak brightness is a secondary consideration - that can be fudged to what a particular display is capable of in many ways, since that's only relevant to specular highlights. What is of...
Forum: Display Calibration   01-10-2016, 11:04 PM
Replies: 131
Views: 4,125
Posted By gwgill
Because it's been adopted as a consumer media...

Because it's been adopted as a consumer media encoding format, and because it seems incompatible with a functional HDR ecosystem.

I can't understand how you think that the encoding format for HDR...
Forum: Display Calibration   01-10-2016, 05:50 PM
Replies: 7
Views: 130
Posted By gwgill
.ccss is a spectral sample, not a matrix. It's...

.ccss is a spectral sample, not a matrix. It's theoretically possible to either convert this to an (X-Rite) .edr file, or capture the 3x3 matrix that is computed from this when it is used with your...
Forum: Display Calibration   01-10-2016, 05:43 PM
Replies: 20
Views: 3,455
Posted By gwgill
Some things you should take into account: 1)...

Some things you should take into account:

1) One persons anecdote doesn't necessarily make it true.
2) Color temperature is a one dimensional metric - it doesn't characterize
two of the 3...
Forum: Display Calibration   12-21-2015, 08:30 PM
Replies: 31
Views: 2,841
Posted By gwgill
You need to switch .sys drivers when you switch...

You need to switch .sys drivers when you switch applications. See here (http://www.argyllcms.com/doc/Installing_MSWindows.html) under "To switch between drivers:".

If that's too painful for...
Forum: Display Calibration   12-20-2015, 04:35 PM
Replies: 7,111
Views: 519,330
Posted By gwgill
Don't upload a matrix - they only work accurately...

Don't upload a matrix - they only work accurately for your particular i1d3. Upload a .ccss file instead (see the ArgyllCMS ccxxmake utility, or see if DispcalGUI will let you measure one.)
Forum: Display Calibration   12-17-2015, 11:00 PM
Replies: 131
Views: 4,125
Posted By gwgill
Agreed - the SMPTE ST 2084:2014 is touted as an...

Agreed - the SMPTE ST 2084:2014 is touted as an HDR EOTF for Mastering Reference Displays, but now seems to have been adopted as a down-stream delivery format by the media and display manufacturers...
Forum: Display Calibration   12-14-2015, 03:31 PM
Replies: 31
Views: 2,841
Posted By gwgill
You need to install the ArgyllCMS .sys driver....

You need to install the ArgyllCMS .sys driver. (Don't be confused by all the old HCFR talk about installing .dll files). General MSWin installation instructions are here...
Forum: Display Calibration   12-06-2015, 04:48 PM
Replies: 573
Views: 30,427
Posted By gwgill
In theory you can calibrate it, but in practice...

In theory you can calibrate it, but in practice there might be some limitations.

If you are using 3DLuts, don't fiddle with the projectors - set them up identically. Set the same target for both...
Forum: Display Calibration   12-01-2015, 05:14 PM
Replies: 7,060
Views: 548,500
Posted By gwgill
Note that the ArgyllCMS meter drivers (unlike the...

Note that the ArgyllCMS meter drivers (unlike the X-Rite ones!), don't do anything weird like install system services that constantly talk to color instruments without an application running. For an...
Forum: Display Calibration   11-26-2015, 11:09 PM
Replies: 4,205
Views: 246,886
Posted By gwgill
There's a fair degree of flexibility in the...

There's a fair degree of flexibility in the current ArgyllCMS as it is, without having to tweak 100 settings to get what you want. The collink -Ib option has up to two parameters :- the gamma and and...
Forum: Display Calibration   11-24-2015, 09:02 PM
Replies: 7,111
Views: 519,330
Posted By gwgill
Why ? If it already has the Argyll/USBLib system...

Why ? If it already has the Argyll/USBLib system driver running for it, no need to re-install.

Are you using MSWindows 8 or 10 ? Did you forget to reboot your system in "Disable Driver Signature...
Forum: Display Calibration   11-24-2015, 08:58 PM
Replies: 29
Views: 671
Posted By gwgill
It's not actually gamut specific, but there are...

It's not actually gamut specific, but there are certainly different flavours of YCbCr encoding that are associated with different gamuts, such as Rec601, Rec709 1150/60/2:1, Rec709 1250/50/2:1,...
Forum: Display Calibration   11-19-2015, 04:59 AM
Replies: 4,205
Views: 246,886
Posted By gwgill
Yes, that's the plan. I don't really know -...

Yes, that's the plan.

I don't really know - I don't think that any of the gear I have access to supports 4K/UHD. I guess it's possible if a 4K Radiance is sufficiently backwards compatible.
Forum: Display Calibration   11-16-2015, 05:07 AM
Replies: 3,182
Views: 162,938
Posted By gwgill
None the less, it does not show how things...

None the less, it does not show how things actually work. No-one should be using box reconstruction from 10nm sampling - the CIE specifications recommend 3rd order polynomial interpolation - nor does...
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