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kiowa said: You are talking about quantization noise here, you can also consider adding a very weak noise (1~2 levels) to shift this quantization noise to a higher frequency range like they do with 16bit audio. Or just leave out a little high frequency noise when filtering.
petopeto said: Adding noise is dithering, and you'd need to add 0.5 for it to work like you're thinking (adding 1 or more is just adding actual noise). I doubt that'll actually help here, but there's no raw in the above image for me to compare, so I'm not sure.
Wavelet based denoising (Neatimage, Noiseninja, Noiseware) can dither pixels. I'm using them after other denoizing in this reason. Running Neatimage with 16bit mode helps the ugly result a bit. However, black should be complete black, white should be complete white I think ideally.
midzki
Running Neatimage with 16bit mode helps the ugly result a bit.
However, black should be complete black, white should be complete white I think ideally.