how to clean whiteboard snapshots in general: http://matthew.mceachen.us/blog/how-to-clean-up-photos-of-whiteboards-with-gimp-403.html script for whiteboard cleaning in batch can be found in this folder also. the batch-whiteboard-clean.scm script should go in: ~/.gimp-2.6/scripts command: gimp -i -b '(batch-whiteboard-clean "*.png")' -b '(gimp-quit 0)' from site: http://registry.gimp.org/node/19822