An Empirical Study for the Multi-class Imbalance Problem with Neural Networks

Authors:
R. Alejo;J. M. Sotoca;G. A. Casañ
Affiliations:
Centro Universitario UAEM Atlacomulco, Universidad Autónoma del Estado de México, Atlacomulco, México and Lab. Reconocimiento de Patrones, Instituto Tecnológico de Toluca, Mete ...;Dept. Llenguatges i Sistemes Informàtics, Universitat Jaume I, Castelló de la Plana, Spain 12071;Dept. Llenguatges i Sistemes Informàtics, Universitat Jaume I, Castelló de la Plana, Spain 12071
Venue:
CIARP '08 Proceedings of the 13th Iberoamerican congress on Pattern Recognition: Progress in Pattern Recognition, Image Analysis and Applications
Year:
2008

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Abstract

The latest research in neural networks demonstrates that the class imbalance problem is a critical factor in the classifiers performance when working with multi-class datasets. This occurs when the number of samples of some classes is much smaller compared to other classes. In this work, four different options to reduce the influence of the class imbalance problem in the neural networks are studied. These options consist of introducing several cost functions in the learning algorithm in order to improve the generalization ability of the networks and speed up the convergence process.