Michael Oertel

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— A new biomimetic honeybee robot capable of dancing and mimicking all known signals in the honeybee dance communication system has been built. This paper describes the hard-and software design of the first honeybee robot with computer vision. The robot can robustly recognize obstacles and react on imminent collisions.
In this paper, we propose an innovative type of CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart). These tests are used to allow a service to discriminate human users from (malicious) bots. With FATCHA, the user is simply asked to perform at random some trivial gesture, e.g., moving the head, which will be captured by the(More)
This paper presents a novel strategy to implement a CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart). The aim of these tests is to easily and reliably distinguish between real human users and (malicious) bots. The approach underlying FATCHA is to exploit real time capture of human actions instead of human ability to(More)
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