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Forum: Display Calibration   12-03-2016, 05:28 AM
Replies: 649
Views: 23,643
Posted By Light Illusion
The best person to really help here is Gordon,...

The best person to really help here is Gordon, from Convergent AV.
He is the UK/EU main reseller for Lumagen (and runs their forum, etc, whicj is another good source for help with the Lumagen and...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   12-01-2016, 01:07 PM
Replies: 77
Views: 1,731
Posted By Light Illusion
Can't say I disagree with you on that! I...

Can't say I disagree with you on that!
I actually find the whole HDR situation a real cluster-f**k :(
And to be honest, I'm not a fan - I find watching it very difficult. A lot of eye strain.
And...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   12-01-2016, 01:01 PM
Replies: 77
Views: 1,731
Posted By Light Illusion
The Studios look for future-proofing... Steve

The Studios look for future-proofing...

Steve
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   12-01-2016, 12:04 PM
Replies: 77
Views: 1,731
Posted By Light Illusion
HDR is a combination - can be either. But, HDR...

HDR is a combination - can be either.
But, HDR is a good one to pick, as there really is no bias lighting in those grading rooms - display based, or grading theatres.
With the PQ curve being so...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   12-01-2016, 11:00 AM
Replies: 77
Views: 1,731
Posted By Light Illusion
Actually, the majority of grading rooms we have...

Actually, the majority of grading rooms we have ever built have very limited bias lighting, if any at all.
Especially, as most are graded in theatres.
(But those that are display based really do...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   11-30-2016, 11:46 AM
Replies: 77
Views: 1,731
Posted By Light Illusion
I am indeed saying that a less than perfect...

I am indeed saying that a less than perfect viewing environment will cause issues visually with shadow details with dirct view near black displays.

This is even more prevalent with HDR, and this...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   11-30-2016, 11:01 AM
Replies: 77
Views: 1,731
Posted By Light Illusion
No - it is equally true (all be it to a lesser...

No - it is equally true (all be it to a lesser extent) with direct view displays.
We build DI grading rooms for a living, and the different between the perception of shadow detail when the room has...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   11-30-2016, 09:48 AM
Replies: 77
Views: 1,731
Posted By Light Illusion
Te real issue is the viewing environment. A...

Te real issue is the viewing environment.
A normal home 'lounge' will washout the deep blacks from OLEDs (and is a real issue with HDR as the PQ curve is nits based, so has no official method for...
Forum: Display Calibration   11-28-2016, 03:39 AM
Replies: 649
Views: 23,643
Posted By Light Illusion
Perfect! :D Steve

Perfect!

:D

Steve
Forum: Display Calibration   11-26-2016, 11:52 AM
Replies: 649
Views: 23,643
Posted By Light Illusion
We are not aware of any outstanding issues with...

We are not aware of any outstanding issues with the SIX-G.
We did a bunch of updates for that some time back, and since then have no known outstanding issues.

If there is something still amiss...
Forum: Display Calibration   11-25-2016, 01:46 AM
Replies: 15
Views: 347
Posted By Light Illusion
If you use the 'Convert Colour Spaces' menu...

If you use the 'Convert Colour Spaces' menu within LightSpace you can see the Gamma value for any of the available colour spaces, and alter them as you wish, re-saving the changed colour spaces with...
Forum: Display Calibration   11-24-2016, 11:59 AM
Replies: 649
Views: 23,643
Posted By Light Illusion
The Multiplier changes the reference peak lumal...

The Multiplier changes the reference peak lumal value from the actual display nits value to the value you specify.

This means you can use manual calibration and have the Luma and delta-e values...
Forum: Display Calibration   11-24-2016, 02:38 AM
Replies: 649
Views: 23,643
Posted By Light Illusion
Actually, the 21 step RGB gamma section of the...

Actually, the 21 step RGB gamma section of the CMS within the Lumagen is populated from a 33^3 3D LUT from within LightSpace CMS.
The 17^3 3D LUT within the Lumagen is also populated from the same...
Forum: Display Calibration   11-24-2016, 02:13 AM
Replies: 15
Views: 347
Posted By Light Illusion
To check the values you can easily use LightSpace...

To check the values you can easily use LightSpace CMS...

Juts set the Black and White value in the 'Options' window, and with the target colour space selected in Calibration Interface drop-down...
Forum: Display Calibration   11-22-2016, 11:31 AM
Replies: 15
Views: 347
Posted By Light Illusion
Just about as easily as seeing 0.0009nits above...

Just about as easily as seeing 0.0009nits above zero (obviously zero is never zero due to screen reflection of room atmospherics, etc., unless you have perfect display and a totally black room, with...
Forum: Display Calibration   11-22-2016, 10:33 AM
Replies: 15
Views: 347
Posted By Light Illusion
No, that's not what is meant by 'relative'... ...

No, that's not what is meant by 'relative'...
And IRE is a unit for composite video signals. We've not used that for years :)
(It would take me ages to re-convert the relative IRE values into...
Forum: Display Calibration   11-22-2016, 06:32 AM
Replies: 15
Views: 347
Posted By Light Illusion
No, not at all. All such calibration should be...

No, not at all.
All such calibration should be 'relative', not absolute.
(Only ST2084 is absolute)

Steve
Forum: Display Calibration   11-22-2016, 02:05 AM
Replies: 15
Views: 347
Posted By Light Illusion
The sRGB encoding function is: x <= 0.0031308 ? x...

The sRGB encoding function is: x <= 0.0031308 ? x * 12.92 : (1.055 * pow(x, 1/2.4)) - 0.055
The Rec709 encoding function is: x < 0.018 ? (x * 4.5) : 1.099 * pow( x, (0.45) ) - 0.099

Both are...
Forum: Display Calibration   11-21-2016, 11:53 AM
Replies: 15
Views: 347
Posted By Light Illusion
For the majority of SDR material watched at home...

For the majority of SDR material watched at home it is likely a power law gamma of 2.2 will be the best choice.
But, there really isn't a simple and definitive setting.

While BT1886 has been the...
Forum: Display Calibration   11-21-2016, 07:43 AM
Replies: 649
Views: 23,643
Posted By Light Illusion
:D Steve

:D

Steve
Forum: Display Calibration   11-21-2016, 07:17 AM
Replies: 649
Views: 23,643
Posted By Light Illusion
Yep, just change the gamma value in the default...

Yep, just change the gamma value in the default pre-set to any value you want, and save as a new pre-set.
See: http://www.lightillusion.com/lut_manual.html#source_colour_space
(Where it says 'User...
Forum: Display Calibration   11-21-2016, 02:36 AM
Replies: 74
Views: 4,708
Posted By Light Illusion
As has been mentioned already, use something like...

As has been mentioned already, use something like the free DPS version of LightSpace CMS to volumetrically profile your display and look at the true underlying level of calibration.

You can also...
Forum: Display Calibration   11-20-2016, 03:06 PM
Replies: 649
Views: 23,643
Posted By Light Illusion
Yeah, we have done a lot of development work for...

Yeah, we have done a lot of development work for HDR, specifically with Lumagen.
And the next release will have yet more - specifically for projection.

Steve
Forum: Display Calibration   11-20-2016, 04:03 AM
Replies: 649
Views: 23,643
Posted By Light Illusion
We're effectively in the middle of a load of new...

We're effectively in the middle of a load of new developments, so there will be quite a few updates coming in the foreseeable future.
We opt to release when we have enough of a selection of new...
Forum: Display Calibration   11-18-2016, 07:45 AM
Replies: 629
Views: 28,389
Posted By Light Illusion
That's not actually correct... There are very...

That's not actually correct...
There are very specific standards for UHD/UHD/WCG as defined by ST2084, Rec2100, etc.
The use of Dynamic Metadata with the like of Dolby Vision is not relevant to...
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