| 光谱学与光谱分析 |
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| Spectra Classification Based on Generalized Discriminant Analysis |
| XU Xin1，2, YANG Jin-fu1, WU Fu-chao1, ZHAO Yong-heng2 |
1. National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences, Beijing 100080, China
2. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China |
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Abstract A kernel based generalized discriminant analysis (GDA) technique is proposed for the classification of stars, galaxies, and quasars. GDA combines the LDA algorithm with kernel trick, and samples are projected by nonlinear mapping onto the feature space F with high dimensions, and then LDA is conducted in F. Also, it could be inferred that GDA which combines the extension of Fisher’s criterion with kernel trick is complementary to kernel Fisher discriminant framework. LDA, GDA, PCA and KPCA were experimentally compared with these three different kinds of spectra. Among these four techniques, GDA obtains the best result, followed by LDA, and PCA is the worst. Although KPCA is also a kernel based technique, its performance is not satisfactory if the selected number of the principal components is small, and in some cases, it appears even worse than LDA, a non-kernel based technique.
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Received: 2005-08-08
Accepted: 2005-11-08
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Corresponding Authors:
XU Xin
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| Cite this article: |
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XU Xin,YANG Jin-fu,WU Fu-chao, et al. Spectra Classification Based on Generalized Discriminant Analysis[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(10): 1960-1964.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2006/V26/I10/1960 |
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