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11. Copycat Hand for All

11. Copycat Hand for All

This video was recorded at AAAI 2009: AI Video Competition. "Copycat Hand for All" is a robot system that imitates the human motions, by visually estimating the human hand and arm postures at a high speed and with high accuracy. The system uses only one high-speed camera and note PC. But once you stand in front of the robot and move your hand and arm freely, it reproduces your behavior without time delay. At the first stage, our system uses coarse screening by the proportional information on the hand images which roughly correspond to forearm rotation, bending of the thumb or four fingers. And then, at the second stage, it performs a detailed search for the selected candidates. The estimation error is less than one degree in the joint angle, and the processing time is 80 fps or more. We are now enhancing flexibility for those having thick/thin, long/short, or deeply hooking fingers, through using different typical hand CG images featuring different bone length and thickness and joint movable ranges in order to permit the system to respond accurately to people of all ages and both sexes, including foreign people. For more information, please see our lab's page at


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