A self-organizing hierarchical classifier for multi-lingual large-set oriental character recognition

Hee Seon Park, Hee Heon Song, Seong Whan Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


In this paper, we propose a practical scheme for multi-lingual, multi-font and multisize large-set Oriental character recognition using a self-organizing hierarchical neural network classifier. In order to absorb the variation of the character shapes in multi-font and multi-size characters, a modified nonlinear shape normalization method based on dot density was introduced, and also to represent the different topological structures of multilingual characters effectively, a hierarchical feature extraction method was adopted. For coarse classification, a tree classifier and SOFM/LVQ based classifier which is composed of an adaptive SOFM coarse-classifier and an LVQ4 language-classifier were considered. For fine classification, a classifier based on LVQ4 learning algorithm has been developed. The experimental results revealed that the proposed scheme has the highest recognition rate of 98.27% for testing data with 7,320 kinds of multi-lingual classes and the time performance of more than 40 characters per second on 486DX-2 66MHz PC.

Original languageEnglish
Pages (from-to)191-206
Number of pages16
JournalInternational Journal of Pattern Recognition and Artificial Intelligence
Issue number2
Publication statusPublished - 1998 Mar


  • LVQ4
  • Language classifier
  • Multi-lingual character recognition
  • Oriental character recognition
  • SOFM

ASJC Scopus subject areas

  • Software
  • Computer Vision and Pattern Recognition
  • Artificial Intelligence


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