Plugin for underexposed images (retinex or such)?

[arana]

There used to be a program called PHOTOFLAIR (from TRUVIEW) (you can still get shareware version HERE but company dissapeared)

It claims it uses a technology called RETINEX  patented by NASA or something like that (MSRCR algorithm  or MSR?) to fix o try to recover light from underexposed images

 

 

here is a GIMP plugin that does similar , not sure if its a rewrite or some adaptation retinex GIMP

here a plugin for PS (8bf) source included

http://www.russellcottrell.com/RCFilters/Retinex.asp

and here is a page that explains (kind of) what the algorithm does, if someone can make something similar to use in Paint.NET

https://spinoff.nasa.gov/spinoff2002/ch_6.html

 

some theory behind it

https://deepai.org/publication/pre-processing-image-using-brightening-clahe-and-retinex

 

 

Edited November 18, 2021 by arana

[BoltBait]

Try this plugin: https://forums.getpaint.net/topic/5578-shadow-highlight-recovery-v22-2008-12-24/