Gabor Feature Extraction for Character Recognition: Comparison with Gradient Feature

Authors:
Cheng-Lin Liu;Masashi Koga;Hiromichi Fujisawa
Affiliations:
Central Research Laboratory, Hitachi, Ltd.;Central Research Laboratory, Hitachi, Ltd.;Central Research Laboratory, Hitachi, Ltd.
Venue:
ICDAR '05 Proceedings of the Eighth International Conference on Document Analysis and Recognition
Year:
2005

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Abstract

Gabor filter feature has been applied to character recognition but was not compared with the best direction feature: gradient feature. In this paper, we propose a principled method for implementing Gabor filters for character feature extraction and compare the recognition performances of Gabor feature and gradient feature on three databases. The results show that Gabor filters with low orientation sensitivity and broad frequency band favor recognition accuracy. The Gabor feature performs comparably or better than the gradient feature on two of the three databases, but is inferior on the rest one.