> Objective metrics (like dssim) are not the best way to compare image codecs. Yep. It is ultimately a subjective experience. I found this out when implement

> Objective metrics (like dssim) are not the best way to compare image codecs. Yep. It is ultimately a subjective experience. I found this out when implementing a color management system back in the early to mid 90s. There is a lot of math, and a lot of physics, of the light, of boundary conditions of ink, etc. But there is also a lot of perception and psychology that is very difficult to capture. As an example, my first attempts were quite accurate as measured, but looked horribly yellow-ish. The reason is that my software was successfully compensating for the blue-ish optical whiteners (UV+blue) in the paper. Which you can't do, because the eye will judge the brightest "nearly white" area in the field of view as white, and judge all the other colors relative to that. But you also can't not do it, because then you ignore what the colors are actually supposed to be. And then it gets tricky...