[dilap]

Confusingly, it's a completely different use of the word "hash"

See here: https://en.wikipedia.org/wiki/Perceptual_hashing

The goal of a perceptual hash is to generate a number that will be the same for all "similar" looking images.

Think like what Shazam does, but in the visual domain.

[onepunchedman]

Thanks for the response, I was super confused by this part!