Two dimensional parameterized matching

  • Authors:
  • Carmit Hazay;Moshe Lewenstein;Dekel Tsur

  • Affiliations:
  • Bar-Ilan University;Bar-Ilan University;University of California, San Diego

  • Venue:
  • CPM'05 Proceedings of the 16th annual conference on Combinatorial Pattern Matching
  • Year:
  • 2005

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Abstract

Two equal length strings, or two equal sized two dimensional texts, parameterize match (p-match) if there is a one-one mapping (relative to the alphabet) of their characters. Two dimensional parameterized matching is the task of finding all m × m substrings of an n× n text that p-match to an m× m pattern. This models, for example, searching for color images with changing of color maps. We present an algorithm that solves the two dimensional parameterized matching problem in O(n2+m2.5·polylog(m)) time.