07-01-2022, 09:23 AM
I am not able to give an answer as to the algorithm used.
But note that the code you refer to is for Colours -> Components -> Decompose and not the GEGL Extract Component (using babl libs ? ) Compare and they do give different results.
The Gimp developers do have a CMYK project ongoing so might be worth asking them. https://gitlab.gnome.org/GNOME/gimp/-/issues
or
the GEGL mailing list https://mail.gnome.org/mailman/listinfo/...loper-list (although it does not look very active at the moment).
But note that the code you refer to is for Colours -> Components -> Decompose and not the GEGL Extract Component (using babl libs ? ) Compare and they do give different results.
The Gimp developers do have a CMYK project ongoing so might be worth asking them. https://gitlab.gnome.org/GNOME/gimp/-/issues
or
the GEGL mailing list https://mail.gnome.org/mailman/listinfo/...loper-list (although it does not look very active at the moment).