Posted Aug 24, 2006 12:50 UTC (Thu) by eru
In reply to: Unexpected benefit?
Parent article: Fighting image spam
You mean "captchas". One way to make OCR ineffective against them
is to use pictures of something, instead of strings. For example,
show photos of well-known people, buildings, or animal species
and ask the person to type the name. For a bot to beat that, it
would have to do sophisticated pattern-matching against a large
library of pictures, making it infeasible for spammers.
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