Interactive Positioning Based on Object Visibility

  • Christian Kray
  • Gerd Kortuem
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3160)


In this paper we describe a new method and user interface for interactive positioning of a mobile device. The key element of this method is a question-answer style dialogue between system and user about the visibility of nearby objects and landmarks; answers given by the user provide clues about the relative position of the user and allow the verification or falsification of hypotheses about the user’s absolute location. This new approach combines the respective strengths of a human user (i. e. fast and reliable object recognition) and a mobile system (i. e. fast computation of numerical data). It enables accurate positioning without requiring any other positioning technologies. A particular advantage of this approach is that it lends itself to the implementation on camera-equipped mobile phones, where it can be used to increase the accuracy of cell-based localisation methods.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Christian Kray
    • 1
  • Gerd Kortuem
    • 1
  1. 1.Computing DepartmentLancaster UniversityLancasterUnited Kingdom

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