Dell U2413 internal 3d LUT and Resolve

[adriano-ol SourceForge]

Hi,

I have a U2413 hardware calibrated um i1 Profiler Pro (internal 3d LUT) to REC.709. Dell/X-Rite software is updated and seams to deal with REC 709 in BT1286 now.

DispcalGUI offers a Resolve preset LUT generetor.

As long as I have a 14bit 3D LUT calibrated monitor, what do I should change in this preset to properly ganerete a LUT for Resolve 12?

Thank you in advance.

[Florian Höch]

Hi,

I have a U2413 hardware calibrated um i1 Profiler Pro (internal 3d LUT) to REC.709. Dell/X-Rite software is updated and seams to deal with REC 709 in BT1286 now.

When the monitor already adheres to Rec. 709 / 1886 through its internal 3D LUT, there’s no need to create another LUT on top of it (provided the internal hardware LUT is accurate).

As long as I have a 14bit 3D LUT calibrated monitor, what do I should change in this preset to properly ganerete a LUT for Resolve 12?

Since this monitor is connected directly, there is no inherent need to go through Resolve when profiling as it will be quite a bit slower, meaning you can change the display (on the “Display & instrument” tab) to the actual display, which should appear as “Dell U2413 @ 0, 0, 1920×1200” or similar in the list (still use the “Resolve” preset as a base so the 3D LUT parameters are setup correctly). Furthermore, to maximize the available colorspace for the 3D LUT, you may want to drive the monitor in its native wide-gamut mode instead of REC709.

• This reply was modified on 2015-11-28 15:45:06 by fhoech.

[Florian Höch]

Also be sure to use the “LCD RG Phosphor” spectral correction if your instrument is an i1 DisplayPro/ColorMunki display.

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Disclosure: As an Amazon Associate I earn from qualifying purchases.

[adriano-ol SourceForge]

Ok!

How can I verify if the internal 3D LUT is ok?
What deltas would indicate a good match?

[Florian Höch]

You can setup the preset like I described, then select “<Current>” under settings (this assumes i1 Profiler created a ICCv2 profile, otherwise it won’t work), then go to the “Verification” tab, disable “Devicelink profile” and click “Measurement report…”. A good result would be an average deltaE 2000 of around 0.5 and a maximum below 3.

[adriano-ol SourceForge]

Great!

I can hardware calibrate this motitor to: Native (seams to chose sRGB primiries when I would expect wider gamuut), sRGB, Adobe RGB, REC709, P3-DCI (emulation).

As long as my workflow is video and visual effecs, would you recomend:

1) Calibrate internaly to REC 709 and be ok with softwares that color correct (After, Photoshop) or don’t (Premiere, Resolve)?

2) Calibrate internaly to a wider gammut (Native or Adobe RGB?) and create LUTs for non color corrected softwares (Resolve, Premiere, mcVR…)?

[Florian Höch]

I would look at the accuracy in hardware calibrated mode (as described above) and make a decisiuon from there.

[adriano-ol SourceForge]

I did a hardware REC709 calibration an verified it. It seams not good, isn’t it?

https://www.dropbox.com/s/08eo6ote9yb7ooc/Measurement%20Report.zip?dl=0

So I’d better hardware calibrate do Native (or Adobe RGB) and perform a profiling through DispcalGUI + LUT to Resolve?

Or baypass hardware calibration, reseting monitor and seting it to “Standard” and do everything with DispcalGUI?

Thank you for your kind attention, Florian!

[Florian Höch]

I wonder if i1Profiler really uses BT 1886. The result looks more like the monitor was calibrated to a 2.2 gamma target. You can change to gamma 2.2 on the “Verification” tab and see if that matches better.

Also, what was the display type selected in i1 Profiler?

[adriano-ol SourceForge]

Yeah, it gets ok with gamma 2.2 verification…

I am using “Dell UltraSharp Calibration Solution” (a Dell version of i1 Profiler) so it detecs my display as U2413.

Waht do you recommend?

[Florian Höch]

Yeah, it gets ok with gamma 2.2 verification…

Can you link the report?

I am using “Dell UltraSharp Calibration Solution” (a Dell version of i1 Profiler) so it detecs my display as U2413.

There should be a little dropdown field below the display selector, unless that’s not there in this custom version of i1 Profiler.

[adriano-ol SourceForge]

Report + DUCS screens
https://www.dropbox.com/s/k1tjygvkt4lqvp4/mesurement%20and%20screens.zip?dl=0

[Florian Höch]

Thanks, that report looks alright, but could probably be better. If you verify through DUCS (not sure if it has that option unlocked, it’s normally called “Profile Quality” I think), how does that turn out?

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