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CG247X calibration - 21^3 cube not registering calibration points/post-cal results same as pre-cal

 
Author grainpost
ZRO
#1 | Posted: 24 Sep 2022 07:20 
I'm attempting to calibrate another CG247X display on a different machine now and I've run in some issues I can't fix on my own. It's been a couple of months since I've done the last calibration, however I'm following the same steps here and something strange is happening when running a 21^3 Cube profile on the display. Despite successfully reading over 10,000 patches (21^3 + drift compensation) I can only see a similar amount of points in the profile as the basic grey ramp, primary, secondary +, both in the profile and in the later created LUT from these images. I tried both using Resolve and Eizo built-in as TPG, with similar results.

After LUT upload to the display, the results of post-cal seem to be identical to pre-cal, but I assume this is connected to the above.

Attached my are Profiling settings, both 21^3 profiles created (one Resolve, one Eizo), respective profile-to-rec709 LUTs & screenshot of post-cal verification.







profiles&LUTs.zip Attached file:
profiles&LUTs.zip

 



Author Steve

INF
Male
#2 | Posted: 24 Sep 2022 07:28 
Please enable the points you want to see in Graph Options.

Steve
Steve Shaw
Mob Boss at Light Illusion

Author grainpost
ZRO
#3 | Posted: 24 Sep 2022 07:32 
Hi Steve,

Attached graph options menu - left on default, which in the past would show me all of registered points. Am I missing something here?




Author Steve

INF
Male
#4 | Posted: 24 Sep 2022 07:44 
As per the Interactive User Manual, you need to select 'Others' to see all 'other' points...

Steve
Steve Shaw
Mob Boss at Light Illusion

Author stuart_p
ZRO
#5 | Posted: 24 Sep 2022 09:25 
The 'other' thing you need to account for with the CG247X is the lut position. You need to match the signal range and also you need to feed RGB to the CG247X and not component. With CSpace it's easy - https://www.youtube.com/watch?v=4MfrSk45i40 is a video tutorial I did for EIZO APAC using CSpace with the CG247X

rgds
Stuart

Author ConnecTED
LTE
#6 | Posted: 24 Sep 2022 17:12 
Since you have an old i1Display PRO with A-02 FW, use BURST 1.5 sec integration time, 0.75 extra delay, no stabilization, install a newer ColourSpace because you are using an old version, and disable intelligent integration.

Delete the config.ini before installing the newer version.

Set de2000.

Tick the Auto @ Luma.

Author grainpost
ZRO
#7 | Posted: 27 Sep 2022 15:21 
Steve, thanks for pointing out - missed it right in front of me.

Stuart - thank you for creating this video, so handy to actually have a step by step video guide. I decided to use Eizo as TPG instead of Resolve and following your guide and slightly different probe settings (as I have a much older probe) got a very satisfying calibration result.

However, while running the same settings on a nearly identical setup (CG247X, new i1 OEM probe, Mac Pro running Win10 through Bootcamp) I'm back to getting strange results - screenshots of settings/results attached. I tried using same probe settings I used for previous calibration, matching with Stuart's from the video, disabling stabilisation & drift compensation to no improvement. Any idea what am I missing here? Steve, can Bootcamp confuse ColourSpace in any way? The first calibration was done on a AMD PC.














Author ConnecTED
LTE
#8 | Posted: 27 Sep 2022 19:23 
Now you use B-02, so add Intelligent Integrator 1.

Extra delay 0.75 sec when you use Resolve.

You still have huge out-of-sync issues.

Enable AUTO @ Luma.

Use an 8-bit; Resolve is not supporting 10-bit.

Author grainpost
ZRO
#9 | Posted: 28 Sep 2022 07:47 
ConnecTED
I'm now using Eizo as TPG, so extra delay not needed, right? And can stay at 10-bit.

Author ConnecTED
LTE
#10 | Posted: 28 Sep 2022 16:50 
grainpost

Your current settings provide huge out of sync problems, set the settings like I have suggested.

Use Resolve TPG with 0.75 extra delay, with 8bit full in ColourSpace and VIDEO in Resolve and 10bit.

Author Steve

INF
Male
#11 | Posted: 29 Sep 2022 06:39 
It is easy to visually see if Extra Delay is needed.
Open the floating patch window in ColourSpace and visually observe when the patch on the display change colour vs. the floating patch window.
(This is explained in the various User Guides: https://www.lightillusion.com/calibration_issues.html#signal_delay)
You can also use the Auto function for Extra Delay.

And, you should update ColourSpace - you are using an old version.

Steve
Steve Shaw
Mob Boss at Light Illusion

Author grainpost
ZRO
#12 | Posted: 29 Sep 2022 11:16 
ConnecTED
Your settings while using DaVinci as TPG rendered a good calibration results with just a small shifts in blues I can live with for the time being.

Steve After using ColourSpace on a different machine i strongly suspect a lot of my issues were due to running this on a Bootcamp system as I also see a lot of delay when loading LUTs to the Eizo compared to the other machine. I'll be in touch to get access to download section in order to update and possibly move the licence to another PC for calibration use. Thank you for your help!

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 CG247X calibration - 21^3 cube not registering calibration points/post-cal results same as pre-cal

 

 
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