A comparative study of feature-salience ranking techniques

W. Wang, P. Jones, D. Partridge

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We assess the relative merits of a number of techniques designed to determine the relative salience of the elements of a feature set with respect to their ability to predict a category outcome-for example, which features of a character contribute most to accurate character recognition. A number of different neural-net-based techniques have been proposed (by us and others) in addition to a standard statistical technique, and we add a technique based on inductively generated decision trees. The salience of the features that compose a proposed set is an important problem to solve efficiently and effectively, not only for neural computing technology but also in order to provide a sound basis for any attempt to design an optimal computational system. The focus of this study is the efficiency and the effectiveness with which high-salience subsets of features can be identified in the context of ill-understood and potentially noisy real-world data. Our two simple approaches, weight clamping using a neural network and feature ranking using a decision tree, generally provide a good, consistent ordering of features. In addition, linear correlation often works well.
Original languageEnglish
Pages (from-to)1603-1623
Number of pages21
JournalNeural Computation
Volume13
Issue number7
DOIs
Publication statusPublished - Jul 2001

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