Helium_foto=img(-171)-max(range(-145;-135))
Helium_band=fix_banding(Helium_foto,25;8)
Helium_zonderbackground=autocrop(remove_bg(Helium_band))
[outputs]
Helium_Clahe=adjust_contrast(CLAHE(Helium_zonderbackground, 1);0;200)
Helium_Decon=linear_stretch(rl_decon(Helium_Clahe;10.5;4.5;10))
Helium_gekleurd=colorize(Helium_Decon; "Helium (D3)")
I got feedback from Cedric Champeau to remove the background script remove_bg
Below is my result, which is much better then my previous (see link) processing.