Colourbrite ColourChecker Pro – QD-OLED Cal

[Lambetts]

Hey Guys,

I’ve been asking a few questions but thought I’d highlight them in one post.

Have a ColourBrite ColourChecker Pro and trying to Calibrate 2 OLED screens. I mostly edit photos and videos in Adobe products.

I have a new QD-OLED ASUS PG32UCDM and had a Spyder x Elite but was recommended to get the ColourBrite CC Pro for more accurate OLED calibration.  I have everything at default, no user profiles in monitor (just set to native 6500k. My laptop is a 2024 G16 Asus Zephyrus OLED.

Some of my questions are:

• What profile should be activated when Calibrating (within windiws)? Non or just a normal Wide Gamut ICC?
• Shall I use sRGB, DCI-P3 or Wide Gamut on my monitor? How do I know what I’m using on my laptop?
• Should automatic colour calibration (in windows display settings) be on or off for calibration?
• To get true white, should I be using the Default (2.2)? Or another pre-set?
• When initial white point measurement’s are being taken, my 6axis options on my monitor don’t actually change the RGB values. I have to either adjust contrast or saturation to get them right. I think somethings wrong there.
• On my laptop, how do I adjust for white point measurement with no manual adjustments for RBG, contrast or saturation? (tried NCP and noVideo)
• Do I need to update the CB CC Pro’s firmware? During calibration, it mentioned firmware is from 2014.
• When I attempted to use CCProfiller, I could not, on any OLED monitor get the initial contrast bar to site with the tick, one notch made it go to the roof and one notch down made it drop below… (since I’m using DisplayCal, I probably wont use this, this was just a question I had, maybe signalling I’m doing something wrong…)
• I have redone a calibrations, just to check, and without changing anything, when I start the white point is way off, I find this strange…

As mentioned, I just want a calibrated monitor and laptop that are the same and accurate. I mostly, at this stage just edit/grade videos, photos in Adobe products (Rec 709 mostly) but, after buying the ColourBrite, thought maybe I’d get some pretty good results off the bat. I do know though, you really have to know how to use DisplayCal, its powerful and versatile.

Thank you so much in advance. Apologies also in advance for being such a noob….

Cheers.

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[DaniJ]

Start by measuring the display. HCFR provides decent charts.

Then decide what needs adjusting, if at all:

• You adjust the white temperature & gamma from the display OSD. If not enough (or not available) you do a calibration and use a VCGT (1D LUT) to correct it.
• Try the sRGB mode first for simplicity. Slight adjustments to the 6 axis options might be enough to get the screen in the desired state without even needing a custom profile (if you also manage to adjust white temperature/gamma from the OSD precisely).

[Lambetts]

Thanks heaps for your reply @DaniJ. I appreciate it. ☺️

So embarrassing but, what’s HCFR and VCGT?
I’m getting a result that looks OK but as me tuned, not sure about all the other things if they effect the end result (auto correction mode on in Windows etc) Also, the laptop is proving difficult to initially calibrate (white point)

[DaniJ]

https://sourceforge.net/projects/hcfr/ makes it easy to measure individual points, like the R, G, B to see your native gamut.

Video Card Gamma Table is a table of corrections the GPU applies to each color, to adjust white balance & gamma. DisplayCal produces it in the “Calibration” phase and stores it in the profile. Especially useful for laptops or displays with no OSD controls.

As you’re dealing with OLEDs, you’ll want to do perceptual matching for the white against a non-OLED display:

• You display a grey patch on a non-OLED display, measure & tweak it until it’s as close to D65 as possible.
• You display a grey patch of similar brightness on the OLED next to it. You tweak it by sight (not instrument) until it matches the other screen. You now measure it and use the output as a reference for a custom white.

As always when you measure with a colorimeter, you’ll need the right spectral correction (in your case CCMS for the right spectral distribution).

[Vincent]

 

• What profile should be activated when Calibrating (within windiws)? Non or just a normal Wide Gamut ICC?

What do you mean by profile? ICC profile or display preset? 1st one does not matter, for 2nd one your custom made ICC profile will be only valid for that preset. You’ll need a profile for each OSD preset, custom or generic.

• Shall I use sRGB, DCI-P3 or Wide Gamut on my monitor?

Whetever you want for whatever your needs are. For color managed enviroment the bigest one.

• How do I know what I’m using on my laptop?

Usually native gamut but some Asus laptop have am app that simulates sRGB using GPU. disable it.

• Should automatic colour calibration (in windows display settings) be on or off for calibration?

win11?
Maybe its the feature that uses EDID coordinates form display to simulate sRGB, disable.

• To get true white, should I be using the Default (2.2)? Or another pre-set?

It’s not related to whitepoint. If you want certain whitepoint set is as target.

• When initial white point measurement’s are being taken, my 6axis options on my monitor don’t actually change the RGB values. I have to either adjust contrast or saturation to get them right. I think somethings wrong there.

6axis controls are for simulate smaller primaries than native, hence do not touch them for color managed enviroment. If you wnat to simulate sRGB on display, use HCFR as DaniJ said.

White is set by RGB gains, not by 6axs controls

• On my laptop, how do I adjust for white point measurement with no manual adjustments for RBG, contrast or saturation? (tried NCP and noVideo)

Whitepoint is set by VCGT during DIsplayCAL calibration. You have to do nothing in RGB bars popup window.

• Do I need to update the CB CC Pro’s firmware? During calibration, it mentioned firmware is from 2014.

You’ll never update it.

• When I attempted to use CCProfiller, I could not, on any OLED monitor get the initial contrast bar to site with the tick, one notch made it go to the roof and one notch down made it drop below… (since I’m using DisplayCal, I probably wont use this, this was just a question I had, maybe signalling I’m doing something wrong…)

Calibrite profiler OLED correction is RGB OLED. Maybe close to QD-OLED but lots of consumer OELD displays are W-OLED and calibrite profile does not support it.
DisplayCAL i1d3 bundle corrections has WOLED sample for LG TVs.

• I have redone a calibrations, just to check, and without changing anything, when I start the white point is way off, I find this strange…

You may have not set whitepoimnt target, hence it was not corrected or you may selected wrong correction, or maybe you and std observer have statistical variance.

As mentioned, I just want a calibrated monitor and laptop that are the same and accurate. I mostly, at this stage just edit/grade videos, photos in Adobe products (Rec 709 mostly) but, after buying the ColourBrite, thought maybe I’d get some pretty good results off the bat.

Adobe Premiere is ICC color managed so you can use native gamut. Resolve for mac is ICC color managed. Resolve for win you’ll need a LUT3D or simulate rec709 on display/GPU

If both display white does not match use whiter display as refernce, then use visual whitepoint editor (color coordinates, choose 3 ball icon in whitepopint) to match visually the 2nd display to the 1st one.
You cannot use absolute colorimetric LUT3D on a visual matched white display with std profiles like Rec709. Easiest solution is to use relative colorimetric.

I do know though, you really have to know how to use DisplayCal, its powerful and versatile.

Thank you so much in advance. Apologies also in advance for being such a noob….

Cheers.

[Author]

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