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Last active September 29, 2023 14:56
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Clean-up a whiteboard photo with GIMP
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gimp-whiteboard.md

How to clean up a whiteboard photo using GIMP

Skipping other possible actions, such as perspective corrections, here is how:

  1. Duplicate the base image layer.
  2. Set the new layer's mode to "Divide".
  3. Apply a Gaussian blur with a radius of about 50 (Filters/Blur/Gaussian Blur...).

If you need to manipulate the resulting image further, create a new layer from visible (Layer/New from Visible).

Reverse-engineered from a script.

@DragonAxe
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This is awesome! So simple! Thanks for sharing! 👍

@andrask
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andrask commented Apr 28, 2023

Waaa! This is revolutionary! Thank you!

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