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> Then it is almost useless.

I'm sure you're in a prime position to judge that.

> In reality, perceptual hashing systems use fuzzy matching on hashes by using a metric like hamming distance to calculate differences between two or more hashes.

Again, Apple's NeuralHash purposefully doesn't work like that [0].

[0] https://twitter.com/jonathanmayer/status/1423370142411476993



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