Optimal techniques in OCR error correction for Japanese texts

  • Authors:

  • T. Hisamitsu;K. Marukawa;Y. Shima;H. Fujisawa;Y. Nitta

  • Affiliations:

  • -;-;-;-;-

  • Venue:
  • ICDAR '95 Proceedings of the Third International Conference on Document Analysis and Recognition (Volume 2) - Volume 2
  • Year:
  • 1995

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Abstract

This paper investigates three fundamental techniques in OCR error correction for Japanese texts using morphological analysis: (1) an optimal method for candidate word extraction from a candidate character lattice, (2) optimal word entries for Japanese verb inflection analysis, and (3) a new method of word matching cost calculation which is more suitable to be used with linguistic criteria. Comparative evaluation shows that the combination of these techniques requires 84% less computation, captures 2.6% more candidate words, reduces the chart parsing computation by 20%, and attains 25% higher error correction rate than a commonly used method.