How important is global structure for characters?

Minoru Mori, Seiichi Uchida, Hitoshi Sakano

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

This paper studies the importance of the features that represent the global structure of character strokes to character recognition. Most existing character recognition methods based on character stroke features utilize a set or a sequence of local features such as xy-coordinates and local direction of strokes. This is natural from the viewpoint that each stroke is a trajectory and thus can be represented as a sequence of local features. This viewpoint, however, has a clear limitation in that local features cannot deal with global structure directly. For example, the sequence of local features cannot deal with the fact that the two end points of character "0" should be close to each other. In this paper we propose a simple and novel global feature that describes the global structure of the character shape of each class. We prove the importance of the global feature through a feature selection experiment. Specifically, we show that the global features are more often selected than local features to enhance classification accuracy under the AdaBoost-based machine learning framework. Recognition experiments using online numeral data show also that the use of global features improves recognition accuracy.

Original languageEnglish
Title of host publicationProceedings - 10th IAPR International Workshop on Document Analysis Systems, DAS 2012
Pages255-260
Number of pages6
DOIs
Publication statusPublished - May 24 2012
Event10th IAPR International Workshop on Document Analysis Systems, DAS 2012 - Gold Coast, QLD, Australia
Duration: Mar 27 2012Mar 29 2012

Publication series

NameProceedings - 10th IAPR International Workshop on Document Analysis Systems, DAS 2012

Other

Other10th IAPR International Workshop on Document Analysis Systems, DAS 2012
CountryAustralia
CityGold Coast, QLD
Period3/27/123/29/12

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering

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  • Cite this

    Mori, M., Uchida, S., & Sakano, H. (2012). How important is global structure for characters? In Proceedings - 10th IAPR International Workshop on Document Analysis Systems, DAS 2012 (pp. 255-260). [6195374] (Proceedings - 10th IAPR International Workshop on Document Analysis Systems, DAS 2012). https://doi.org/10.1109/DAS.2012.41