A constraint decomposition method for spatio-temporal configuration problems

  • Authors:
  • Toshikazu Tanimoto

  • Affiliations:
  • Digital Equipment Corporation Japan, Tokyo, Japan

  • Venue:
  • AAAI'93 Proceedings of the eleventh national conference on Artificial intelligence
  • Year:
  • 1993

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Abstract

This paper describes a flexible framework and an efficient algorithm for constraint-based spatio-temporal configuration problems. Binary constraints between spatio-temporal objects are first converted to constraint regions, which are then decomposed into hierarchical data structures; based on this constraint decomposition, an improved backtracking algorithm called HBT can compute a solution quite efficiently. In contrast to other approaches, the proposed method is characterized by the efficient handling of arbitrarily-shaped objects, and the flexible integration of quantitative and qualitative constraints; it allows a wide range of objects and constraints to be utilized for specifying a spatio-temporal configuration. The method is intended primarily for configuration problems in user interfaces, but can effectively be applied to similar problems in other areas as well.