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Search: Keyword(s): ; Posts Made By: gwgill
Forum: Display Calibration   08-15-2016, 05:01 PM
Replies: 41
Views: 932
Posted By gwgill
General advice is to only change controls that...

General advice is to only change controls that affect the physical operation of the display - i.e. the backlight.
Controls which merely emulate an affect in software (often contrast controls etc.)...
Forum: Display Calibration   08-07-2016, 04:23 PM
Replies: 16
Views: 348
Posted By gwgill
I'm not sure why you say that. While the...

I'm not sure why you say that. While the measurement you reported is a bit on the "too good" side, it is not obviously wrong. Anything in the range 0.01 - 0.5 cd/m^2 is conceivable for an LCD...
Forum: Display Calibration   08-06-2016, 09:57 PM
Replies: 16
Views: 348
Posted By gwgill
Most non-laboratory instruments are rather...

Most non-laboratory instruments are rather inaccurate in absolute terms, while their linearity is generally pretty good, and it is the latter that is of more importance for calibrating or profiling....
Forum: Display Calibration   08-06-2016, 09:00 PM
Replies: 16
Views: 348
Posted By gwgill
i1 Profiler ? - no idea, not my software. ...

i1 Profiler ? - no idea, not my software.

HCFR uses the ArgyllCMS driver, and by default will be using adaptive mode, so there is nothing to set.

Doesn't strike me as being "way off", unless...
Forum: Display Calibration   08-06-2016, 08:06 PM
Replies: 16
Views: 348
Posted By gwgill
You are using a measurement mode that doesn't...

You are using a measurement mode that doesn't properly adapt the integration time to the light level, and the resulting measurement is being quantized down to zero.

The i1d3 has very good low...
Forum: Display Calibration   07-29-2016, 07:49 PM
Replies: 4,361
Views: 258,594
Posted By gwgill
Yes, should be possible. Put the spectrometer...

Yes, should be possible. Put the spectrometer behind the glasses, and the colorimeter directly on the display.

I'd imagine that "Tools->Create colorimeter correction..." would be an obvious place...
Forum: Display Calibration   07-10-2016, 08:41 PM
Replies: 4,361
Views: 258,594
Posted By gwgill
Note that because of the limited measurement rate...

Note that because of the limited measurement rate of the Munki display, it's not practical to measure the display refresh rate and synchronize the measurements for refresh type displays. All that's...
Forum: Display Calibration   06-30-2016, 05:07 AM
Replies: 4,361
Views: 258,594
Posted By gwgill
Right - but an RS232 and USB based serial...

Right - but an RS232 and USB based serial instrument are quite different when it comes to automatically identifying them. Both have to be identified heuristically which can be time consuming, and...
Forum: Display Calibration   06-28-2016, 06:04 PM
Replies: 4,361
Views: 258,594
Posted By gwgill
I don't know about any K10's that aren't USB,...

I don't know about any K10's that aren't USB, certainly don' have one, and so I haven't made any allowance for supporting it. I'm not sure exactly what would be involved, but if you contact me...
Forum: Display Calibration   06-10-2016, 01:54 AM
Replies: 45
Views: 1,203
Posted By gwgill
Not really, since it's a white reference, not a...

Not really, since it's a white reference, not a wavelength reference. A self check will tell you if something is seriously amiss, but it is not the same as a check against a full set of color...
Forum: Display Calibration   06-09-2016, 06:26 PM
Replies: 45
Views: 1,203
Posted By gwgill
Gretag Macbeth is the original manufacturer of...

Gretag Macbeth is the original manufacturer of the i1Pro - X-Rite later bought Gretag Macbeth.

EFI ES 1000 is a re-badged instrument. Usually the serial number sticker tells the story. For...
Forum: Display Calibration   06-09-2016, 06:19 PM
Replies: 11
Views: 238
Posted By gwgill
Yes, ArgyllCMS goes to some trouble to make sure...

Yes, ArgyllCMS goes to some trouble to make sure native device values get displayed rather than color managed ones.
Forum: Display Calibration   06-05-2016, 07:03 PM
Replies: 4,361
Views: 258,594
Posted By gwgill
Why are you assuming that 17-33 flashing is...

Why are you assuming that 17-33 flashing is something that is desirable ?
The calibration target is not "make 17-33 bars flash", it is "make the response conform to the specified reproduction...
Forum: Display Calibration   05-31-2016, 05:24 PM
Replies: 11
Views: 238
Posted By gwgill
ArgyllCMS & DispCAL run on OS X, so you can ICC...

ArgyllCMS & DispCAL run on OS X, so you can ICC profile your display, and/or create a Video 3dLut.
Forum: Display Calibration   05-18-2016, 05:37 AM
Replies: 7,814
Views: 565,704
Posted By gwgill
They'll keep publishing garbage gamut numbers...

They'll keep publishing garbage gamut numbers just as long as everyone keeps on accepting it.
Forum: Display Calibration   05-16-2016, 04:10 PM
Replies: 7,814
Views: 565,704
Posted By gwgill
Most such numbers are complete rubbish - they are...

Most such numbers are complete rubbish - they are computing 2D area's in the highly perceptually non-linear x,y space.

An actual color gamut is 3D, and to have any meaning, the volume comparison...
Forum: Display Calibration   05-15-2016, 07:54 PM
Replies: 589
Views: 32,255
Posted By gwgill
It's still at the top of my "to do" list. ...

It's still at the top of my "to do" list.

Due to financial necessity, other tasks are currently taking priority.
Forum: Display Calibration   05-11-2016, 05:54 PM
Replies: 557
Views: 21,307
Posted By gwgill
Nothing that can be automatically determined from...

Nothing that can be automatically determined from the picture is going to make for interesting meta-data.

Interesting & valuable meta-data would convey information that the image and an algorithm...
Forum: Display Calibration   05-09-2016, 04:52 PM
Replies: 557
Views: 21,307
Posted By gwgill
I think that qualifies as being "contrived"...

I think that qualifies as being "contrived" :-)
Forum: Display Calibration   05-08-2016, 04:24 PM
Replies: 557
Views: 21,307
Posted By gwgill
Maybe you are referring to a manipulated...

Maybe you are referring to a manipulated photographic image of the above painting, but no actual painting is HDR, unless it was to be lit and shown in very contrived circumstances. Typical viewing...
Forum: Display Calibration   05-04-2016, 12:29 AM
Replies: 557
Views: 21,307
Posted By gwgill
The paper doesn't support such a conclusion. ...

The paper doesn't support such a conclusion.

It does say that the hue linearity and perceptual uniformity depend on the models used to measure them, and they caution that the perceptual uniformity...
Forum: Display Calibration   05-03-2016, 05:35 AM
Replies: 557
Views: 21,307
Posted By gwgill
The whole presentation of the paper seemed to be...

The whole presentation of the paper seemed to be angling towards make it an encoding standard. Why rotate the space to make skin-tones line up with existing encoding standards etc., if this is not...
Forum: Display Calibration   05-03-2016, 05:02 AM
Replies: 557
Views: 21,307
Posted By gwgill
There is no need to make the encoding space the...

There is no need to make the encoding space the gamut mapping or tone mapping space, unless your computational mechanisms to do the transform are particularly limited.
Forum: Display Calibration   05-03-2016, 04:59 AM
Replies: 557
Views: 21,307
Posted By gwgill
Providing a diffuse white reference level is not...

Providing a diffuse white reference level is not dictating a tone mapping, it is merely very useful information to give to a tone mapping algorithm. The fact that it is missing and has to be guessed...
Forum: Display Calibration   04-26-2016, 04:28 PM
Replies: 50
Views: 1,325
Posted By gwgill
There is a large philosophical gap for most...

There is a large philosophical gap for most people. Tell people "and this knob lets you adjust the picture so it looks really good to YOU", and they think "Yes, that's exactly what I want - the...
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