Perhaps I am misunderstanding something, but why can't you just do the
following:
Open GIMP
Open the .pdf file
Gimp will show a PDF-Input window:
change the resolution to at least 300ppi
select only the pages that contain the images you want
(use
Albretch,
This will likely be a two-step process:
1. Extract page images from pdf using a tool such at the one you indicate.
2. Extract subpage components from separate image files, using a tool such
as: https://opensource.com/article/18/5/getting-started-luminoth
Linux terminals makes such
