By kenman
via research.microsoft.com
Submitted: Jun 21 2008 / 21:08
"Asirra (Animal Species Image Recognition for Restricting Access) is a HIP that works by asking users to identify photographs of cats and dogs." As a bonus, the kicker is that the animals used for this CAPTCHA are all up for adoption via a link underneath the photo. Oh yeah, the web service runs on python!
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