Reduced-search dynamic programming for approximation of polygonal curves

  • Authors:
  • Alexander Kolesnikov;Pasi Fränti

  • Affiliations:
  • Department of Computer Science, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland and Institute of Automation and electrometry, Pr.Ak.Koptyug, 1, Novosibirsk-90, 630090 Russia;Department of Computer Science, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland

  • Venue:
  • Pattern Recognition Letters
  • Year:
  • 2003

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Abstract

Approximation of polygonal curves with minimum error (min-ε problem) can be solved by dynamic programming, or by graph-theoretical approach. These methods provide optimal solution but they are slow for a large number of vertices. Faster methods exist but they lack the optimality. We try to bridge the gap between the slow but optimal, and the fast but sub-optimal algorithms by giving a new near-optimal approximation algorithm based on reduced-search dynamic programming. The algorithm can be iterated as many times as further improvement is achieved in the optimization. It is simple, fast, and it has a low space complexity.