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> I could not imagine I would be able to differentiate a billion colors from its previous factor. Darker single color gradients exhibit very strongly noticeabl

> I could not imagine I would be able to differentiate a billion colors from its previous factor. Darker single color gradients exhibit very strongly noticeable color stairs. Tried to generate one for a background, locked horrible. It only looked good once I randomized the gradients a bit, i.e., even with 8 bit colors, you might need dithering. Similar effects can be noticed in relatively dark photos of scenes with gradients, e.g., a sky.

Ballas 6y ago
Are you sure the panel you are viewing on is in fact also 8bits/color? The only time I have experienced what you are describing was when the panel turned out to be 6bpc - at the time I was working with raw data from a 12 bit sensor. Of course my experience is only 1 test point...
- kuschku 6y ago
  > Are you sure the panel you are viewing on is in fact also 8bits/color Yes, if you actually compare a 10-bit and an 8-bit panel next to another, it's immediately obvious. Here's a photo of a 6-bit, 10-bit and 8-bit gradient on a native 10-bit panel without any dithering (Dell UP2718Q): https://i.k8r.eu/VolYbQ.png https://i.k8r.eu/VolYbQ.png
  - Ballas 6y ago
    Thanks, that is very informative. Could you give a link to the source, or even the grey level range used here? I am trying to reproduce the results, but I an not having any luck unless I change my brightness/contrast to unacceptable levels.
    - kuschku 6y ago
      That’s the grey level test of the official VESA DisplayHDR Test application: https://www.microsoft.com/en-us/p/displayhdr-test/9nn1gpn70nf3?activetab=pivot:overviewtab https://www.microsoft.com/en-us/p/displayhdr-test/9nn1gpn70n... Running on a Dell UP2718Q, in HDR10 mode. That said, in person can be – depending on environmental lighting conditions – much more subtle. The test here was done with blinds closed in a mostly dark room. In bright environments 8-bit is enough, and 6-bit with dithering can be close, but in dark environments (such as when watching a movie or gaming) you'll even notice banding in 10-bit content.
deleted 6y ago
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Ballas 6y ago

Are you sure the panel you are viewing on is in fact also 8bits/color? The only time I have experienced what you are describing was when the panel turned out to be 6bpc - at the time I was working with raw data from a 12 bit sensor. Of course my experience is only 1 test point...

kuschku 6y ago
> Are you sure the panel you are viewing on is in fact also 8bits/color Yes, if you actually compare a 10-bit and an 8-bit panel next to another, it's immediately obvious. Here's a photo of a 6-bit, 10-bit and 8-bit gradient on a native 10-bit panel without any dithering (Dell UP2718Q): https://i.k8r.eu/VolYbQ.png https://i.k8r.eu/VolYbQ.png
- Ballas 6y ago
  Thanks, that is very informative. Could you give a link to the source, or even the grey level range used here? I am trying to reproduce the results, but I an not having any luck unless I change my brightness/contrast to unacceptable levels.
  - kuschku 6y ago
    That’s the grey level test of the official VESA DisplayHDR Test application: https://www.microsoft.com/en-us/p/displayhdr-test/9nn1gpn70nf3?activetab=pivot:overviewtab https://www.microsoft.com/en-us/p/displayhdr-test/9nn1gpn70n... Running on a Dell UP2718Q, in HDR10 mode. That said, in person can be – depending on environmental lighting conditions – much more subtle. The test here was done with blinds closed in a mostly dark room. In bright environments 8-bit is enough, and 6-bit with dithering can be close, but in dark environments (such as when watching a movie or gaming) you'll even notice banding in 10-bit content.

deleted 6y ago

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