I was trying to find code performing https://docs.gimp.org/2.10/de/gimp-filter-snn-mean.html in gimp codebase, but i am able to find only something looking like UI code (not actual math).
I want to peek at this code , my goal is to recreate this filter in python to implement image-processing-pieline designed by my colegue-artist in GIMP.
Operations like filters are defined in separate repository:
https://gitlab.gnome.org/GNOME/gegl
this particular filter is defined here:
https://gitlab.gnome.org/GNOME/gegl/-/blob/master/operations/common/snn-mean.c