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Evaluating a Zoning Mechanism and Class-Modular Architecture for Handwritten Characters Recognition

  • Sandra de Avila
  • Leonardo Matos
  • Cinthia Freitas
  • João M. de Carvalho
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4756)

Abstract

In this article we propose a feature extraction procedure based on directional histograms and investigate the application of a nonconventional neural network architecture, applied to the problem of handwritten character recognition. This approach is inspired on some characteristics of the human visual system, as it focus attention on high spatial frequencies and on the recognition of local features. Two architectures were tested and evaluated: a conventional MLP (Multiple Layer Perceptron) and a class-modular MLP. Experiments developed with the Letter database produced a recognition rate of 93.67% for the class-modular MLP. Other set of experiments utilized the IRONOFF database resulting in recognition rates of 89.21% and 80.75% for uppercase and lowercase characters respectively, also with the class-modular MLP.

Keywords

Handwritten characters recognition Class-modular architecture Directional histogram 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Sandra de Avila
    • 1
  • Leonardo Matos
    • 1
  • Cinthia Freitas
    • 2
  • João M. de Carvalho
    • 3
  1. 1.Federal University of Sergipe, Comp. Depart., São Cristóvão, SEBrazil
  2. 2.Pontifical Catholic University of Parana, Curitiba, PRBrazil
  3. 3.Federal University of Campina Grande, Campina Grande, PBBrazil

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