Confused Xerox copiers rewrite scanned documents, expert finds (2013)

(2013). The whole ordeal lead to a quite legendary presentation by David at CCC (german, no captions, live translation available but pretty bad): https://youtu.be/7FeqF1-Z1g0

If you speak german and haven’t seen this yet, watch it, this is a classic. His talks are all entertaining and interesting.

the c3 page links to english captions in progress: https://c3subtitles.de/talk/381/#eng

any appetite among the german speakers to finish them?

There is a version with an English voice over of the original talk here:

https://youtu.be/zXXmhxbQ-hk

And the talk he gave in English himself here:

https://m.youtube.com/watch?v=c0O6UXrOZJo

Jbig2 sounds like a bad option for a photocopier. They should not attempt to parse what they're copying.

Very tangentially related: did you know that photocopiers recognize a particular pattern of circles to detect if someone attempts to copy a banknote?

https://en.wikipedia.org/wiki/EURion_constellation

From 2013 but yeah, what an unexpected thing to happen from a copy machine!

To me, this is why the whole pinch-to-zoom debate of the recent trial was legit. You really don't know what changes to pixels technology is making unless you look at the code.