[Dylan16807]

> If the brightness cap of the HDR image is full SDR brightness, what value remains in HDR?

If you set #ffffff to be a comfortable max, then that would be the brightness cap for HDR flares that fill the entire screen.

But filling the entire screen like that rarely happens. Smaller flares would have a higher cap.

For example, let's say an HDR scene has an average brightness that's 55% of #ffffff, but a tenth of the screen is up at 200% of #ffffff. That should give you a visually impressive boosted range without blinding you.

[mort96]

Oh.

I don't want the ability for 10% of the screen to be so bright it hurts my eyes. That's the exact thing I want to avoid. I don't understand why you think your suggestion would help. I want SDR FFFFFF to be the brightest any part of my screen goes to, because that's what I've configured to be at a comfortable value using my OS brightness controls.

[Dylan16807]

I strongly doubt that the brightness to hurt your eyes is the same for 10% of the screen and 100% of the screen.

I am not suggesting eye hurting. The opposite really, I'm suggesting a curve that stays similarly comfortable at all sizes.

[mort96]

I don't want any one part of my screen to be a stupidly bright point light. It's not just the total amount of photons that matters.

[Dylan16807]

It is not just the total amount.

But it's not the brightest spot either.

It's in between.

[mort96]

I just don't want your "in between" "only hurt my eyes a little" solution. I don't see how that's so hard to understand. I set my brightness so that SDR FFFFFF is a comfortable max brightness. I don't understand why web content should be allowed to go brighter than that.

[Dylan16807]

I'm suggesting something that WON'T hurt your eyes. I don't see how that's so hard to understand.

You set a comfortable max brightness for the entire screen.

Comfortable max brightness for small parts of the screen is a different brightness. Comfortable. NO eye hurting.