University of Bologna

Dipartimento di Elettronica, Informatica e Sistemistica

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Co-operative Classifiers for High Quality Handprinted Character Recognition

Zs. M. Kovacs-V. and R. Guerrieri and G. Baccarani


In this paper a high quality handprinted character recognition system is presented. Four classifiers based on simple features work in parallel and their cooperation is used for quality improvement. The four classifiers are based on two different normalization sequences, on two different feature extraction methods and on two different classification techniques. The results of the classifiers are combined using a multilayer perceptron acting as supervisor, which extracts the overall information contained in the output of the classifiers. The results obtained on the NIST Test Data 1 are reported using the upper-case letters in the NIST Special Database 3 as training set, featuring 3.68% error rate when no rejection is allowed.

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