Removing paper colour from a scanned illustration

Fremantle
2024 December 21 (Saturday), 11:20AM
· Wikisource · archiving ·

I quite often find myself extracting engravings and ink sketches from scanned works. Wikisource has some info about how to do it, but this is roughly how I do it in Gimp:

1. Use the Mono Mixer tool (the Colors > Components > Mono Mixer menu item), and twiddle the colours till it looks good.
2. Adjust the levels (the Colors > Levels… menu item).
3. Posterize down to two colours.

• 
  Original
• 
  After Mono Mixer
• 
  After Levels
• 
  After Posterize

Then a bit of clean up of the wayward bits.

← PreviousNext →

My main RSS news feed: https://samwilson.id.au/news.rss
(or Wikimedia.rss, Fremantle.rss, OpenStreetMap.rss, etc. for topic feeds).
Email me at sam samwilson.id.au or leave a comment below…