Mathematically right values in decomposing to LAB ?

[ggbutcher (Glenn Butcher)]

@Elle

This “binning” - and maybe I’m using totally the wrong word, but hopefully I’ve explaing what I’m trying to point to by using the word - is different from using a scaling algorithm that tries to preserve detail. The assumption is that noise and detail look an awful lot alike to a scaling algorithm, so if size reduction while also decreasing noise is the goal, don’t use algorithms that try to preserve detail.

Wouldn’t a gaussian blur do the trick?