[sundarurfriend]

The point is not to have "elegant and compact" code, this is meant to be a fun curiosity, and doing it in 10 lines is just an additional layer of challenge for the heck of it.

The interesting thing is not in whether GZip can achieve SOTA, it's that it can do a decent job at all. (The interesting thing is not in whether the bear can recreate Mozart exactly, it's that it can play the piano at all.)

[ActivePattern]

Yeah, it does demonstrate that you can use compression to measure similarity of two images.

But it also demonstrates that it's a pretty poor similarity measure. Something as simple as counting % of matches between the black and white pixels performs much better.