Quote:
Originally Posted by oldpainlesskodi
@ Warner360,
Not sure if it has been covered before, but is there a calculation for target nits? My Samsung KS8000 has a claimed nits of 1,000 in HDR mode, but using the new HDR to SDR algo, anything over a target nits of 125 makes the image too dark.
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That makes no sense. I've never heard of a display that uses a target nits that low, let alone an actual HDR display.
There is no current way to calculate this. It may help to label this setting "target HDR nits" or "target PQ nits" because it is unrelated to the brightness of your display. It is a measure of how much compression is applied to the original curve in absolute nits, not relative nits.
I have two displays that are around 150 nits. One uses a setting of 350-400 nits, the other 450-500 nits with the same 2.40 gamma curve to achieve similar relative brightness. Your result is nonsense.
If you have an HDR display that bright, you wouldn't benefit much from HDR -> SDR, anyways. Passthrough would be the way to go.