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Proceedings Paper

Model for selectively increasing learning sample number in character recognition
Author(s): Norihiro Hagita; Minako Sawaki; Ken'ichiro Ishii
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Paper Abstract

Increasing the sample size plays an important role in improving recognition accuracy. When it is difficult to collect additional character data written by new writers, distorted characters artificially generated from the original characters by a distortion model can serve as the additional data. This paper proposes a model for selecting those distorted characters that improve recognition accuracy. Binary images are used as a feature vector. In the experiments, recognition based on the k nearest neighbor rule is made for the handwritten zip code database, called IPTP CD-ROM1. Distorted characters are generated using a new model of nonlinear geometrical distortion. New learning samples consisting of the original ones and the distorted ones are generated iteratively. In this model, distortion parameter range is investigated to yield improved recognition accuracy. The results show that the iterative addition of slightly distorted characters improves recognition accuracy.

Paper Details

Date Published: 7 March 1996
PDF: 8 pages
Proc. SPIE 2660, Document Recognition III, (7 March 1996); doi: 10.1117/12.234705
Show Author Affiliations
Norihiro Hagita, NTT Basic Research Labs. (Japan)
Minako Sawaki, NTT Basic Research Labs. (Japan)
Ken'ichiro Ishii, NTT Basic Research Labs. (Japan)


Published in SPIE Proceedings Vol. 2660:
Document Recognition III
Luc M. Vincent; Jonathan J. Hull, Editor(s)

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