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A comment on Convert Apple NeuralHash model for CSAM Detection to ONNX. Parent comment

Re:Convert Apple NeuralHash model for CSAM Detection to ONNX by enriquto on Wednesday August 18, 2021 @11:51AM (#28222999)
I don't understand the concept of "slightly different hash". Aren't hashes supposed to be either equal or completely different?
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Re:Convert Apple NeuralHash model for CSAM Detection to ONNX by fizx on Wednesday August 18, 2021 @11:57AM (#28223085)
You're thinking of cryptographic hashes. There are many kinds of hash (geographic, perceptual, semantic, etc), many of which are designed to only be slightly different.
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Re:Convert Apple NeuralHash model for CSAM Detection to ONNX by richardxia on Wednesday August 18, 2021 @11:59AM (#28223116)
There is a class of hashes known as locality-sensitive hashes, which are designed to preserve some metric of "closeness".

https://en.wikipedia.org/wiki/Locality-sensitive_hashing

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