Breaking a Visual CAPTCHAGreg Mori(1,2) and Jitendra Malik (1) (1) UC Berkeley Computer Vision Group (2) Simon Fraser University Summary This is the homepage of the Shape Contexts based approach to break Gimpy, the CAPTCHA test used at Yahoo! to screen out bots. Our method can successfully pass that test 92% of the time. The approach we take uses general purpose algorithms that have been designed for generic object recogn
