Header logo is ei

A Robot System for Biomimetic Navigation: From Snapshots to Metric Embeddings of View Graphs

2008

Book Chapter

ei


Complex navigation behaviour (way-finding) involves recognizing several places and encoding a spatial relationship between them. Way-finding skills can be classified into a hierarchy according to the complexity of the tasks that can be performed [8]. The most basic form of way-finding is route navigation, followed by topological navigation where several routes are integrated into a graph-like representation. The highest level, survey navigation, is reached when this graph can be embedded into a common reference frame. In this chapter, we present the building blocks for a biomimetic robot navigation system that encompasses all levels of this hierarchy. As a local navigation method, we use scene-based homing. In this scheme, a goal location is characterized either by a panoramic snapshot of the light intensities as seen from the place, or by a record of the distances to the surrounding objects. The goal is found by moving in the direction that minimizes the discrepancy between the recorded intensities or distances and the current sensory input. For learning routes, the robot selects distinct views during exploration that are close enough to be reached by snapshot-based homing. When it encounters already visited places during route learning, it connects the routes and thus forms a topological representation of its environment termed a view graph. The final stage, survey navigation, is achieved by a graph embedding procedure which complements the topologic information of the view graph with odometric position estimates. Calculation of the graph embedding is done with a modified multidimensional scaling algorithm which makes use of distances and angles between nodes.

Author(s): Franz, MO. and Stürzl, W. and Reichardt, W. and Mallot, HA.
Book Title: Robotics and Cognitive Approaches to Spatial Mapping
Pages: 297-314
Year: 2008
Day: 0

Series: Springer Tracts in Advanced Robotics ; 38
Editors: Jefferies, M.E. , W.-K. Yeap
Publisher: Springer

Department(s): Empirical Inference
Bibtex Type: Book Chapter (inbook)

Address: Berlin, Germany
Digital: 0
DOI: 10.1007/978-3-540-75388-9_18
ISBN: 978-3-540-75388-9
Organization: Max-Planck-Gesellschaft
School: Biologische Kybernetik

Links: PDF
PDF

BibTex

@inbook{2216,
  title = {A Robot System for Biomimetic Navigation: From Snapshots to Metric Embeddings of View Graphs},
  author = {Franz, MO. and St{\"u}rzl, W. and Reichardt, W. and Mallot, HA.},
  booktitle = {Robotics and Cognitive Approaches to Spatial Mapping},
  pages = {297-314},
  series = {Springer Tracts in Advanced Robotics ; 38},
  editors = {Jefferies, M.E. , W.-K. Yeap},
  publisher = {Springer},
  organization = {Max-Planck-Gesellschaft},
  school = {Biologische Kybernetik},
  address = {Berlin, Germany},
  year = {2008}
}