1. 西安交通大学电子与信息工程学院,西安,710049
2. 西安石油大学电子工程学院,西安,710065
网络首发:2008-10-10,
纸质出版:2008
移动端阅览
穆向阳 1, 2, 张太镒 1, 等. 一种鲁棒的概率主成分分析方法[J]. 西安交通大学学报, 2008,42(10):1217-1220.
穆向阳 1, 2, 张太镒 1, et al. A Robust Probability Principle Component Analysis Method[J]. 2008, 42(10): 1217-1220.
针对传统主成分对实际样本的奇点不敏感的缺陷
提出了一种鲁棒概率主成分分析(RPPCA)方法.首先引入连续的决策变量构造新能量函数
将事先给定的硬门限改为自适应确定的软门限
门限值由样本自动确定
再计算概率主成分进行特征提取.与线性主成分分析(LPCA)和概率主成分分析(PPCA)方法相比
RPPCA方法更为实用
有效地减小了奇点的影响
显示出比PPCA更强的稳健性
也扩大了实用范围.实验结果表明
RPPCA方法的分类准确率比LPCA方法平均提高了3.2%
比PPCA方法平均提高了0.7%.
In order to overcome the drawback that traditional principal component analysis fails to the outliers existing in the realistic data
a robust probability principal component analysis(RPPCA)method is proposed. A continuous decision variable is introduced into the energy function
and the preset hard threshold is replaced by a soft adaptive threshold which is automatically determined by the data. The algorithm is then embedded in the procedure of PPCA's principal component feature extraction. Compared with PCA and probability principal component analysis(PPCA)
the proposed RPPCA can resist outlier well
is more robust than PPCA
and enlarges the real application area.The simulation results show that the algorithm improves 3.2% classification accuracy to LPCA
and 0.7% to PPCA on average.
TIPPING M E,BISHOP C M. Probabilistic principal component analysis [J]. J Roy Statist Soc, Series B,1999, 61(3): 611-622.
BISHOP C M. Latent variable models, learning in graphical models [M]. Jordan M I. Cambridge, MA, USA: MIT Press, 1999:371-403.
ZHAO Weixiang, CHEN Dezhao, HU Shangxu. Detection of outlier and a robust BP algorithm against outlier [J]. Computers Chemical Engineering, 2004, 28(8): 1403-1408.
BULLEN R J, CORNFORD D, NABNEY I T. Outlier detection in scatterometer data: neural network approaches [J]. Neural Networks, 2003, 16(3): 419-426.
XU Lei, YUILLE A L. Robust principal component analysis by self-organizing rules based on statistical physics approach [J]. IEEE Trans on Neural Networks, 1995, 6(1): 131-143.
GAVRILA D M, GIEBEL J. Shape-based pedestrian detection and tracking [C]∥ Proceedings of IEEE Intelligent Vehicle Symposium. Piscataway, NJ, USA:IEEE Press, 2002: 8-14.
Zhao L, Thorpe C E. Stereo and neural network-based pedestrian detection [J]. IEEE Trans on Intelligent Transportation Systems, 2000, 1(3): 148-154.
The MIT-CBCL Face Recognition Database [EB/OL].(2003-01-08)[2007-11-16].http:∥cbcl.mit.edu/software-datasets/heisele/facerecognition-database.html.
CRISTIANINI N, SHAWE-TAYLOR J. An introduction to support vector machines and other kernel-based learning methods [M]. Cambridge, England: Cambridge University Press, 2000.
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