Every day tens of millions of "captchas" are solved by humans, using undreds of thousands of man-hours of work. But what if those person hours could be used for something beneficial? They can be. (you may have noticed recaptcha being used on some notable sites)
posted by delmoi on Nov 8, 2007 - 23 comments

breaking CAPTCHAs. In this case the programmers were able to use software they had already designed to analyze images of people.
posted by delmoi on Jan 31, 2005 - 33 comments