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April 19th, 2023 06:00
S2722QC, color management with Mac Display P3
Hello, I'm trying to understand how the S2722QC manages color gamut from a Mac Studio for MacBook Pro when connected with USB-C.
SmartHDR is off on the S2722QC with Standard picture profile, but in testing the monitor still displays the P3 color space. In the Movie picture profile, the monitor does not show the P3 color space.
When SmartHDR is off and the monitor is in Standard picture profile, is the S2722QC showing the 83% of P3 that it can? Should SmartHDR be used with a Mac when video editing?
Thanks
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yumichan
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April 20th, 2023 02:00
Display does not "manage" colorspace, it "has" some colorspace under some preset.
It is OS task (and user task) to set as default display profile an ICC profile that matches actual display colorspace under that OSD preset in monitor.
Eric214
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April 20th, 2023 06:00
Hmm, I'm still a bit confused. The specs on the S2722QC say it covers 99% sRGB. There's no mention of other color gamuts, so how could the display show the P3 color space from the mac with Smart HDR turned off?
yumichan
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April 21st, 2023 00:00
So since macOS desktop is color managed (although very limited) and "trusting" factory calibration, you can use the built in profile ICC that was created by macOS when you plug display BUT thi setup is ONLY valid at native gamut (usually Standard, Custom and color temp presets).
If you switch to some sRGB preset that setup is no longer valid and macOS default display profile must be configured to whatever colorspace monitor is simulating.
Then when you switch back to Standard OSD mode you should use that default ICC profile created by macOS from EDID data.
But as said above, macOS desktop is color managed so using srgb preset is mostly useless. If you trust factory calibration stick to Standard and color temp presets (or Custom to tweak whietpoint with ONLY RGB GAIN) and the ICC profile autocreated by macOS.
yumichan
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April 21st, 2023 00:00
coverage = set intersection, like in set theory explained to kids in school.
Coverage does not mean "equal", just that reference subset is "inside" monitor gamut up to certain %.
Eric214
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April 24th, 2023 08:00
Thanks, that's good to know about the auto-created ICC profile. How does Smart HDR work with Macs?
yumichan
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April 25th, 2023 01:00
Unlikely to work unless you select high dynamic range in system preferences and your screen.
Also your display is SDR (even if it accepts HDR signal as input) so it's mostly useless as in any other SDR screen that has no actual HDR capabilities. Better to use a software HDR to SDR mapper than rely on built in HDR translator to SDR capabilities of display because that way you can choose if you whish to track PQ as tone response curve (destroying black level) as in built in mode, or to deviate for PQ in the highs to keep more friendly black levels on a typical IPS display.
I won't use HDR modes in an IPS display without a lot of FALD zones and these are right now on a more expensive segment.