Confusingly, it's a completely different use of the word "hash" See here: https://en.wikipedia.org/wiki/Perceptual_hashing https://en.wikipedia.org/wiki/Percep

Confusingly, it's a completely different use of the word "hash" See here: https://en.wikipedia.org/wiki/Perceptual_hashing 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.