Color banding and noise removal

[real.finder]

Originally Posted by real.finder

if you have time can you port dither_bilateral16, Dither_box_filter16 and SmoothGrad to independent plugins with new appropriate names and HBD?

for now I think we only miss Dither_bilateral16 alternative
Dither_box_filter16 and Dither_bilateral16 https://forum.doom9.org/showthread.p...16#post1951312

SmoothGrad https://forum.doom9.org/showthread.p...16#post1952859