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I have a multi-page PDF loaded as layers in GIMP. I want to automate the following actions in sequence:

  1. Select and make first layer visible, others non-visible
  2. Duplicate layer
  3. Apply Gaussian Blur
  4. Change mode to Divide
  5. Merge visible layers
  6. Move to next layer, repeat 1 to 4

Actually, automating steps 2 to 4 is good enough.

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Without writing any code, if you have not got too many layers (or have enough RAM):

  1. Create a single layer holding all your pages.
  2. Apply your operations.
  3. Split the resulting big layer into pages again.

Operations 1 and 3 can be done using the ofn-layer-tiles script.

Otherwise you would need a custom script. Not that hard if you have some programmming experience (plenty of examples in the page linked).

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  • I have some programming experience, Python actually. So I might have a chance if someone guides me with custom script.
    – JeffP
    Jul 14, 2021 at 12:18
  • I downloaded ofn-layer-tiles script, installed. I don't know how to use it. Obviously I have to join layers first, as all pages are imported in separate layers.
    – JeffP
    Jul 14, 2021 at 12:34
  • The ZIP contains a HTML doc. Read it. The script takes all your layers (as a stack) and spreads them side by side as a big image (and vice-versa).
    – xenoid
    Jul 14, 2021 at 12:42
  • Otherwise a simple example not so far from what you want to do is in ofn-difference-layer (freshly uploaded). Further discussion best done here or at least on SO, because this is beyond the realm of GDSE.
    – xenoid
    Jul 14, 2021 at 12:45
  • Oh, I got it all finally. Thank you so much. And it's amazing what 8gig RAM can do :)
    – JeffP
    Jul 14, 2021 at 14:00

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