Feature extraction for nonlinear classification

Authors:
Anil Kumar Ghosh;Smarajit Bose
Affiliations:
Theoretical Statistics and Mathematics Unit, Indian Statistical Institute, Calcutta, India;Theoretical Statistics and Mathematics Unit, Indian Statistical Institute, Calcutta, India
Venue:
PReMI'05 Proceedings of the First international conference on Pattern Recognition and Machine Intelligence
Year:
2005

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Abstract

Following the idea of neural networks, multi-layer statistical classifier [3] was designed to capture interactions between measurement variables using nonlinear transformation of additive models. However, unlike neural nets, this statistical method can not readjust the initial features, and as a result it often leads to poor classification when those features are not adequate. This article presents an iterative algorithm based on backfitting which can modify these features dynamically. The resulting method can be viewed as an approach for estimating posterior class probabilities by projection pursuit regression, and the associated model can be interpreted as a generalized version of the neural network and other statistical models.