PieFed uses PDQ hashing to generate a fingerprint of an image and can use that fingerprint to detect other posts that use the same or fairly similar images, for moderation purposes. Hashes are added to a block list which stops the image from being re-posted in future.
Currently each instance maintains their own list of hashes. But in the near future it will be possible to share them so that if I see something horrific & ban it then the ban will be automatically applied to your instance too and then you won’t need to see the image at all.
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Very cool. Can’t wait to see this go live.
that sharing of hashes seems to be something that can be abused to keep something under wraps. we’ll see 😀
