Improving robot navigation in structured outdoor environments by identifying vegetation from laser data

  • Authors:
  • Kai M. Wurm;Rainer Kümmerle;Cyrill Stachniss;Wolfram Burgard

  • Affiliations:
  • University of Freiburg, Department of Computer Science, Freiburg, Germany;University of Freiburg, Department of Computer Science, Freiburg, Germany;University of Freiburg, Department of Computer Science, Freiburg, Germany;University of Freiburg, Department of Computer Science, Freiburg, Germany

  • Venue:
  • IROS'09 Proceedings of the 2009 IEEE/RSJ international conference on Intelligent robots and systems
  • Year:
  • 2009

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Abstract

This paper addresses the problem of vegetation detection from laser measurements. The ability to detect vegetation is important for robots operating outdoors, since it enables a robot to navigate more efficiently and safely in such environments. In this paper, we propose a novel approach for detecting low, grass-like vegetation using laser remission values. In our algorithm, the laser remission is modeled as a function of distance, incidence angle, and material. We classify surface terrain based on 3D scans of the surroundings of the robot. The model is learned in a self-supervised way using vibration-based terrain classification. In all real world experiments we carried out, our approach yields a classification accuracy of over 99%. We furthermore illustrate how the learned classifier can improve the autonomous navigation capabilities of mobile robots.