Exactly Robust Kernel Principal Component Analysis

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

3 Scopus Citations
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Original languageEnglish
Pages (from-to)749-761
Journal / PublicationIEEE Transactions on Neural Networks and Learning Systems
Issue number3
Online published29 Apr 2019
Publication statusPublished - Mar 2020


Robust principal component analysis (RPCA) can recover low-rank matrices when they are corrupted by sparse noises. In practice, many matrices are, however, of high rank and, hence, cannot be recovered by RPCA. We propose a novel method called robust kernel principal component analysis (RKPCA) to decompose a partially corrupted matrix as a sparse matrix plus a high- or full-rank matrix with low latent dimensionality. RKPCA can be applied to many problems such as noise removal and subspace clustering and is still the only unsupervised nonlinear method robust to sparse noises. Our theoretical analysis shows that, with high probability, RKPCA can provide high recovery accuracy. The optimization of RKPCA involves nonconvex and indifferentiable problems. We propose two nonconvex optimization algorithms for RKPCA. They are alternating direction method of multipliers with backtracking line search and proximal linearized minimization with adaptive step size (AdSS). Comparative studies in noise removal and robust subspace clustering corroborate the effectiveness and the superiority of RKPCA.

Research Area(s)

  • High rank, kernel, low rank, noise removal, robust principal component analysis (RPCA), sparse, subspace clustering