@graypixel
You are not at all stupid, nobody is stupid, I recognize - the reproach has already been made - that the explanation I give for Retinex, as for Wavelet better explains the algorithm (how it works, its principle, … ) than its operating instructions (what to do, what to do to obtain a result).
Some time ago, Paul (Paul Matthijsse) started a process of developing tutorials, but for some time I have not seen anything new.
I will try, on a more significant example than the one you give, to describe an approach, but I do not guarantee anything. I would do it in French.
To be complete, I would also use “retinex in wavelet” in branch “Newwaveletgtk3” which is almost “dead” (no comment) for 6 months
@Morgan_Hardwood
To deal with what you are talking about, there is “locallab Retinex”
Jacques