期刊
INFORMATION SCIENCES
卷 573, 期 -, 页码 345-359出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ins.2021.05.079
关键词
Principal component analysis; Robustness; Feature extraction; Reconstruction error minimization; Variance maximization
资金
- National Science Foundation of China [U1831127, 62072246, 61871444]
- Natural Science Foundation of Jiangsu Province [BK20171453]
- Industry University Research Project of Jiangsu Science and Technology Department [BY2020033]
- open project for young teachers of Nanjing Audit University (School of Information Engineering) [A111010004/012]
- Qinglan Project of Jiangsu Province
A novel robust PCA formulation called Double L-2, L-p-norm based PCA (DLPCA) is proposed in this paper for feature extraction, which simultaneously considers the minimization of reconstruction error and the maximization of variance to ensure insensitivity to outliers. Experimental results demonstrate the effectiveness of this method in feature extraction.
Recently, robust-norm distance related principal component analysis (PCA) for feature extraction has been shown to be very effective for image analysis, which considers either minimization of reconstruction error or maximization of data variance in low-dimensional subspace. However, both of them are important for feature extraction. Furthermore, most of existing methods cannot obtain satisfactory results due to the utilization of inflexible robust norm for distance metric. To address these problems, this paper proposes a novel robust PCA formulation called Double L-2,L-p-norm based PCA (DLPCA) for feature extraction, in which the minimization of reconstruction error and the maximization of variance are simultaneously taken into account in a unified framework. In the reconstruction error function, we target to learn a latent subspace to bridge the relationship between the trans-formed features and the original features. To guarantee the objective to be insensitive to outliers, we take L-2,L-p-norm as the distance metric for both reconstruction error and data variance. These characteristics make our method more applicable for feature extraction. We present an effective iterative algorithm to obtain the solution of this challenging work, and conduct theoretical analysis on the convergence of the algorithm. The experimental results on several databases show the effectiveness of our model. (C) 2021 Elsevier Inc. All rights reserved.
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