Complexity-reduced implementations of complete and null-space-based linear discriminant analysis
Complexity-reduced implementations of complete and null-space-based linear discriminant analysis
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完整且基于零空间的线性判别分析的复杂性降低实现
DOI:
10.1016/j.neunet.2013.05.010
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发表时间:
2013-10
期刊:
影响因子:
7.8
通讯作者:
Zheng Wenming (郑文明)
中科院分区:
文献类型:
--
作者:
Lu Guifu;Zheng Wenming (郑文明)
Dimensionality reduction has become an important data preprocessing step in a lot of applications. Linear discriminant analysis (LDA) is one of the most well-known dimensionality reduction methods. However, the classical LDA cannot be used directly in the small sample size (SSS) problem where the within-class scatter matrix is singular. In the past, many generalized LDA methods has been reported to address the SSS problem. Among these methods, complete linear discriminant analysis (CLDA) and null-space-based LDA (NLDA) provide good performances. The existing implementations of CLDA are computationally expensive. In this paper, we propose a new and fast implementation of CLDA. Our proposed implementation of CLDA, which is the most efficient one, is equivalent to the existing implementations of CLDA in theory. Since CLDA is an extension of null-space-based LDA (NLDA), our implementation of CLDA also provides a fast implementation of NLDA. Experiments on some real-world data sets demonstrate the effectiveness of our proposed new CLDA and NLDA algorithms.
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DOI:
10.1016/c2009-0-27872-x
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期刊:
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DOI:
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发表时间:
1996-04
期刊:
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影响因子:
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