6 ms·
Presumably, the idea is to count sufficiently similar images as the same image when doing the deduplication, so traditional hashing doesn't help here.
by charles-salvia 10y ago
Presumably, the idea is to count sufficiently similar images as the same image when doing the deduplication, so traditional hashing doesn't help here.
- evincarofautumn 10y agoMaybe they were thinking of fingerprinting, e.g., by downsampling. It’s dual in some sense to hashing—a small change to some data should produce a large change in its hash, but a small change in its fingerprint.
- fake-name 10y agoHashing is the correct term here, but it's not a cryptographic hash, but rather a perceptual hash: https://en.wikipedia.org/wiki/Perceptual_hashing https://en.wikipedia.org/wiki/Perceptual_hashing