Tuesday, December 28, 2010

non-linguistic CAPTCHA

David Bradley, writing at sciencetech, reports on a new face-based CAPTCHA process, quoting the team that created it, "Unlike a text-based CAPTCHA, a major benefit of the proposed image-based face detection CAPTCHA is that it does not have any language barriers..."

I guess it never really occurred to me that there would be language barriers in CAPTCHAs because so many of the strings are in fact nonesense words, but I guess language specific phonotactics are helpful (often the identity of a single letter is quite ambiguous).

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