Close
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.
1~2 is the mean strength applied to the whole image, and not every pixel get that much, so I guess I'll be fine. (With my current monitor I can't tell between 0 and 1 so I have no proof though -_-||| )

Maybe filtering at 16bit and try to dither the image when coming back to 8bit also helps, I don't know if photoshop does this well or just "nearest neighbour" 16bit levels to 8bit levels...