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For anyone caring just enough to wonder what scene referred and display referred are talking about… scene referred does its filtering and mapping work on the p
by jws 5y ago
For anyone caring just enough to wonder what scene referred and display referred are talking about…
scene referred does its filtering and mapping work on the pixel values in a linear space, presumably linear to "photons observed" but I could be wrong there.
display referred does its filtering and mapping on pixel values which have already been through a nonlinear function to make them appropriate for display.
The scene referred people say they don't tend make silly skin tones and avoid "rat piss" sunsets as well as reducing artifacts like halos around blurs. (I presume that means the blurs are something like Gaussian blurs performing linear operations on the nonlinear data.)
This is all I know.
- hatsunearu 5y ago> scene referred does its filtering and mapping work on the pixel values in a linear space, presumably linear to "photons observed" but I could be wrong there. You are correct. If you see Y light in real life, and that corresponds to a pixel value of 1000, 2Y light should correspond to 2000. > display referred does its filtering and mapping on pixel values which have already been through a nonlinear function to make them appropriate for display. The nonlinear function is usually 0 brightness to 100% brightness of the media (for instance, pure white on a printed piece of paper or pure white on a display). Scene referred photos technically have no bound (there is clipping, but you can just expose less and increase the exposure in editing to effectively get the same thing) Of note is that you have to change a scene referred color space into display referred color space anyways...