Accelerated Discovery of Discrete M-Clusters/Outliers on the Raster Plane Using Graphical Processing Units

  • Authors:
  • Christian Trefftz;Joseph Szakas;Igor Majdandzic;Gregory Wolffe

  • Affiliations:
  • School of Computing, Grand Valley State University, Allendale, MI 49401;Computer Information Systems, Univ. of Maine-Augusta, Augusta, ME 04330;School of Computing, Grand Valley State University, Allendale, MI 49401;School of Computing, Grand Valley State University, Allendale, MI 49401

  • Venue:
  • ICCS '09 Proceedings of the 9th International Conference on Computational Science: Part I
  • Year:
  • 2009

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Abstract

This paper presents two discrete computational geometry algorithms designed for execution on Graphics Processing Units (GPUs). The algorithms are parallelized versions of sequential algorithms intended for application in geographical data mining. The first algorithm finds clusters of m points, called m-clusters, in the rasterized plane. The second algorithm complements the first by identifying outliers, those points which are not members of any m-clusters. The use of a raster representation of coordinates provides an ideal data stream environment for efficient GPU utilization. The parallel algorithms have low memory demands, and require only a limited amount of inter-process communication. Initial performance analysis indicates the algorithms are scalable, both in problem size and in the number of seeds, and significantly outperform commercial implementations.