Qualitative Path Reasoning Based on Voronoi Diagram
WANG Xiao-Dong1,2,LIAO Shi-Zhong1
1.School of Computer Science and Technology,Tianjin University,Tianjin 300072 2.Department of Physics Electronic Engineering,Mudanjiang Normal University,Mudanjiang 157012
Abstract Qualitative motion reasoning is important in qualitative spatial reasoning research. Based on Voronoi diagram and its dynamic changes,a qualitative representation and reasoning method for motion paths is proposed. Firstly,the spatial relations among generators of Voronoi diagram are described by adjacent relations,the spatial positions and their conceptual neighborhood are defined,and the motion path is qualitatively represented by the sequence of conceptual-neighboring qualitative positions. Then,a qualitative path reasoning algorithm with an observer perspective is designed and implemented by the changes in edges of the dynamic Voronoi diagram and the proposed heuristic algorithm of shortest path between two qualitative positions. Finally,the experimental result and analysis demonstrate the validity of the proposed methods.
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2013, Vol. 26 
