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September 2011

Autonomous Acquisition of Multimodal Information for Online Object Concept Formation by Robots

  • T. Araki, T. Nakamura, T. Nagai, K. Funakoshi, M. Nakano, N. Iwahashi,
  • in Proceedings of the 2011 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2011),
  • IEEE,
  • 2011,
  • pp. 1540-1547,
  • Conference paper

This paper proposes a robot that acquires multimodal information, i.e. auditory, visual, and haptic information, fully autonomous way using its embodiment. We also propose an online algorithm of multimodal categorization based on the acquired multimodal information and words, which are partially given by human users. The proposed framework makes it possible for the robot to learn object concepts naturally in everyday operation in conjunction with a small amount of linguistic information from human users. In order to obtain multimodal information, the robot detects an object on a fla surface. Then the robot grasps and shakes it for gaining haptic and auditory information. For obtaining visual information, the robot uses a hand held small observation table, so that the robot can control the viewpoints for observing the object. As for the multimodal concept formation, the multimodal LDA using Gibbs sampling is extended to the online version in this paper. The proposed algorithms are implemented on a real robot and tested using real everyday objects in order to show validity of the proposed system.

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