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ledoge / novideo_srgb

Calibrate monitors to sRGB or other color spaces on NVIDIA GPUs, based on EDID data or ICC profiles
GNU General Public License v3.0
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Should sRGB clamp persist even after toggling HDR? #98

Open Gerchan opened 3 months ago

Gerchan commented 3 months ago

So I noticed that if I keep sRGB clamped and toggle HDR, the de-saturation that clamping does persist. If I toggle the clamp off, the reds become more red like they would unclamped. So what is the correct usage in this case?

EtherealAO commented 2 months ago

Turn off the clamp before turning HDR on, Windows (afaik, only 11) will handle it with Auto Color Management. I use HDR for the main monitor and clamp the others to sRGB, their colors look almost the same.

casef commented 1 month ago

When you toggle HDR on, the desaturation will seemingly persist because as soon as HDR is active, Windows automatically renders all SDR content with proper sRGB gamut clamp and gamma curve. So it will look like it's still active, but it's not. You're still getting correct colors, but through a different mechanism.

(This is also why many people will complain that once they turn on HDR in Windows, everything looks "washed out". They're simply not used to seeing properly clamped sRGB with proper sRGB gamma curve because they've been using their monitors in SDR with uncorrected wide gamut - so oversaturated - and with a pure 2.2 power gamma curve, if not 2.4 or 1886 or something like that, because that's how their monitors come from the manufacturer.)