Could something like contex be used to identify text in an image so that a Nostr client keyword filter could hide notes that normally would be let through?
Something like this has been on my mind, and contex seems close.
Discussion
It could do that, the text recognition is pretty fast, you might end up with a bit of a buffer of notes that are being evaluated. I am thinking also of adding stop words to the posting tool so one does not accidentally post images with PII in them