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• W2904698128 abstract "In many applications, high-dimensional data points can be well represented by low-dimensional subspaces. To identify the subspaces, it is important to capture a global and local structure of the data which is achieved by imposing low-rank and sparseness constraints on the data representation matrix. In low-rank sparse subspace clustering (LRSSC), nuclear and ℓ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1</sub> -norms are used to measure rank and sparsity. However, the use of nuclear and ℓ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1</sub> -norms leads to an overpenalized problem and only approximates the original problem. In this paper, we propose two ℓ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0</sub> quasi-norm-based regularizations. First, this paper presents regularization based on multivariate generalization of minimax-concave penalty (GMC-LRSSC), which contains the global minimizers of a ℓ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0</sub> quasi-norm regularized objective. Afterward, we introduce the Schatten-0 (S <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0</sub> ) and ℓ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0</sub> -regularized objective and approximate the proximal map of the joint solution using a proximal average method (S <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0</sub> /ℓ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0</sub> -LRSSC). The resulting nonconvex optimization problems are solved using an alternating direction method of multipliers with established convergence conditions of both algorithms. Results obtained on synthetic and four real-world datasets show the effectiveness of GMC-LRSSC and S <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0</sub> /ℓ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0</sub> -LRSSC when compared to state-of-the-art methods." @default.
• W2904698128 created "2018-12-22" @default.
• W2904698128 creator A5032871012 @default.
• W2904698128 creator A5064824381 @default.
• W2904698128 date "2020-04-01" @default.
• W2904698128 modified "2023-09-30" @default.
• W2904698128 title "$ell_0$ -Motivated Low-Rank Sparse Subspace Clustering" @default.
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• W2904698128 doi "https://doi.org/10.1109/tcyb.2018.2883566" @default.
• W2904698128 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30561362" @default.
• W2904698128 hasPublicationYear "2020" @default.
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