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Constraint tangent distance for on-line character recognition

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2 Author(s)
H. Schwenk ; PARC, Paris VI Univ., France ; M. Milgram

In online character recognition we can observe two kinds of intra-class variations: small geometric deformations and completely different writing styles. We propose a new approach to deal with these problems by defining an extension of tangent distance, well known in off-line character recognition. The system has been implemented with a k-nearest neighbor classifier and a so called diabolo classifier respectively. Both classifiers are invariant under transformations like rotation, scale or slope and can deal with variations in stroke order and writing direction. Results are presented for our digit database with more than 200 writers

Published in:

Pattern Recognition, 1996., Proceedings of the 13th International Conference on  (Volume:4 )

Date of Conference:

25-29 Aug 1996