and a more detailed examination of common perceptual hashing algorithms (skip to table 3 for the collision probabilities): https://ceur-ws.org/Vol-2904/81.pdf
And there was a whole lot of explanation of how probable cause works and how it's different from programmers' aspirations to perfection.
Do you have any evidence that this is happening? You don't think someone would have noticed by now if it were?
And as I pointed out, we're not talking about a search warrant on a person, we're talking about whether it's necessary to get a search warrant to look at a picture to determine if it's an illegal image.
