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It's so over (lemmy.world)

submitted 5 months ago by [email protected] to c/[email protected]

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[–] [email protected] 4 points 5 months ago

I'm just saying, but captcha had a purpose. It still kind of does. Whether solved by a person or by an AI.

I'm pretty sure that for a good while there it was using captcha to help its text recognition more accurately determine what words were from scans of books that were imported en masse to Google books as images of pages. We're talking about books published before computers were used to write them. The text recognition algorithm had an idea of what the letters should be, but didn't have a high enough confidence in the result, so it was sent through captcha to get a consensus from humans.

The humans answering the captcha would just verify whether it was one of a small list of possible matches, and in doing so, train the machine vision algorithm to better detect the letter in the future.

That's what I heard at least. IDK. I just live here (on the internet).