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Re: [Public WebGL] WebGL support for high bit depth rendering & display

On 12/09/20 16:37, Matt McLin wrote:

Also, for any that doubt the benefit of > 8-bits per channel, consider this link:
See slide 48 in this presentation on just-noticeable-differences vs. luminance from WinHec 2008.  You see that 8-bits was sufficient for low luminance levels of early displays, but as luminance increases, people are able to discern between 9 and 10 bits.  I have looked at the difference between 8, 9, and 10 bit gradients myself many times, and can vouch for its visibility on a good display.  

When the data is coded linearly, you need 14-bits to display what a human will perceive as a completely smooth gradient. With non-linear (perceptually uniform) coding , e.g. sRGB, this can be achieved with 9 bits. See



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