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Unexpected benefit?
Unexpected benefit?
Posted Aug 24, 2006 9:45 UTC (Thu) by NAR (subscriber, #1313)In reply to: Unexpected benefit? by eru
Parent article: Fighting image spam
but might help defeating some of the current defense strategies used against web forum spamming (i.e. put an image to the registrating page which is hard to detect by a computer but easier to detect by a user, and type the string on the image into a textfield)...
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Unexpected benefit?
Posted Aug 24, 2006 12:50 UTC (Thu) by eru (subscriber, #2753) [Link]
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.
Unexpected benefit?
Posted Aug 24, 2006 16:13 UTC (Thu) by NAR (subscriber, #1313) [Link]
I'm afraid it would be really hard to create a set of images that every user would recognize - after all, "well known" is a relative concept.