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Object interaction and task programming by demonstration in visuo-haptic augmented reality
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DOI：10.1007/s00530-015-0488-z.png)
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摘要
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A visuo-haptic augmented reality system is presented for object manipulation and task learning from human demonstration. The proposed system consists of a desktop augmented reality setup where users operate a haptic device for object interaction. Users of the haptic device are not co-located with the environment where real objects are present. A three degrees of freedom haptic device, providing force feedback, is adopted for object interaction by pushing, selection, translation and rotation. The system also supports physics-based animation of rigid bodies. Virtual objects are simulated in a physically plausible manner and seem to coexist with real objects in the augmented reality space. Algorithms for calibration, object recognition, registration and haptic rendering have been developed. Automatic model-based object recognition and registration are performed from 3D range data acquired by a moving laser scanner mounted on a robot arm. Several experiments have been performed to evaluate the augmented reality system in both single-user and collaborative tasks. Moreover, the potential of the system for programming robot manipulation tasks by demonstration is investigated. Experiments show that a precedence graph, encoding the sequential structure of the task, can be successfully extracted from multiple user demonstrations and that the learned task can be executed by a robot system.
Keyword:
Visuo-haptic augmented reality
Programming by demonstration
Collaborative manipulation
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