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论文类型：期刊论文

发表时间：2013-06-01

发表刊物：SIGNAL PROCESSING

收录刊物：SCIE、EI

卷号：93

期号：6,SI

页面范围：1608-1623

ISSN号：0165-1684

关键字：NMF; IOPNMF; Incremental learning; On-line learning; Parts-based representation; Visual tracking; Occlusion handling

摘要：This paper presents a novel incremental orthogonal projective non-negative matrix factorization (IOPNMF) algorithm, which is aimed to learn a parts-based subspace that reveals dynamic data streams. By assuming that the newly added samples only affect basis vectors but do not affect the coefficients of old samples, we propose an objective function for on-line learning and then present a multiplicative update rule to solve it. Compared with other non-negative matrix factorization (NMF) methods, our algorithm can guarantee to learn a linear parts-based subspace in an on-line fashion, which may facilitate some real applications. The facial analysis experiment shows that our IOPNMF method learns parts-based components successfully. In addition, we present an effective tracking method by integrating the IOPNMF method, the idea of sparse representation and the domain information of object tracking. The proposed tracker explicitly takes partial occlusion and mis-alignment into account for appearance model update and object tracking. The experimental results on some challenging image sequences demonstrate the proposed tracking algorithm performs favorably against several state-of-the-art methods. (C) 2012 Elsevier B.V. All rights reserved.