This paper presents a general framework for solving the low-rank and/or sparse matrix minimization problems, which may involve multiple nonsmooth terms. The iteratively reweighted least squares (IRLSs) method is a fast solver, which smooths the objective function and minimizes it by alternately updating the variables and their weights. However, the traditional IRLS can only solve a sparse only or low rank only minimization problem with squared loss or an affine constraint. This paper generalizes IRLS to solve joint/mixed low-rank and sparse minimization problems, which are essential formulations for many tasks. As a concrete example, we solve the Schatten-p norm and ℓ2,q-norm regularized low-rank representation problem by IRLS, and theoretically prove that the derived solution is a stationary point (globally optimal if p, q ≥ 1). Our convergence proof of IRLS is more general than previous one that depends on the special properties of the Schatten-p norm and ℓ2,q-norm. Extensive experiments on both synthetic and real data sets demonstrate that our IRLS is much more efficient.
Smoothed Low Rank and Sparse Matrix Recovery by Iteratively Reweighted Least Squares Minimization
Canyi Lu,Zhouchen Lin,Shuicheng Yan
Published 2014 in IEEE Transactions on Image Processing
ABSTRACT
PUBLICATION RECORD
- Publication year
2014
- Venue
IEEE Transactions on Image Processing
- Publication date
2014-01-28
- Fields of study
Mathematics, Computer Science, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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