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http://dx.doi.org/10.5391/JKIIS.2009.19.1.090

Datawise Discriminant Analysis For Feature Extraction  

Park, Myoung-Soo (서울대학교 전기컴퓨터공학부)
Choi, Jin-Young (서울대학교 전기컴퓨터공학부)
Publication Information
Journal of the Korean Institute of Intelligent Systems / v.19, no.1, 2009 , pp. 90-95 More about this Journal
Abstract
This paper presents a new feature extraction algorithm which can deal with the problems of linear discriminant analysis, widely used for linear dimensionality reduction. The scatter matrices included in linear discriminant analysis are defined by the distances between each datum and its class mean, and those between class means and mean of whole data. Use of these scatter matrices can cause computational problems and the limitation on the number of features. In addition, these definition assumes that the data distribution is unimodal and normal, for the cases not satisfying this assumption the appropriate features are not achieved. In this paper we define a new scatter matrix which is based on the differently weighted distances between individual data, and presents a feature extraction algorithm using this scatter matrix. With this new method. the mentioned problems of linear discriminant analysis can be avoided, and the features appropriate for discriminating data can be achieved. The performance of this new method is shown by experiments.
Keywords
Linear dimentionality reduction; linear discriminant analysis; data discriminant analysis; distance between individual data; non-normally distributed data;
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