[Reel.Deel]

Interesting find Arx1meD. Looking around I found another implementation in Python:

• Underwater colour correction - In this project, we studied, implemented and tested an underwater colour correction method from Bianco et al.
• https://github.com/p-ebert/underwater_colour_correction

The color transformations there are consistent with what is used in the pdf.

Edit:

I found this page: Paralenz color correction algorithm and it produces a decent looking result for the example image.



The GitHub page describes the process:

The algorithm

Calculate the average color for image.
Hueshift the colors into the red channel until a minimum red average value of 60.
Create RGB histogram with new red color.
Find low threshold level and high threshold level.
Normalize array so threshold level is equal to 0 and threshold high is equal to 255.
Create color filter matrix based on the new values.

Maybe something that can already be done in AviSynth?