Kernel group sparse representation classifier via structural and non-convex constraints.

Zheng, J., Qiu, H., Sheng, W., Yang, X. and Yu, H., 2018. Kernel group sparse representation classifier via structural and non-convex constraints. Neurocomputing. (In Press)

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DOI: 10.1016/j.neucom.2018.03.035

Abstract

In this paper, we propose a new classifier named kernel group sparse representation via structural and non-convex constraints (KGSRSN) for image recognition. The new approach integrates both group sparsity and structure locality in the kernel feature space and then penalties a non-convex function to the representation coefficients. On the one hand, by mapping the training samples into the kernel space, the so-called norm normalization problem will be naturally alleviated. On the other hand, an interval for the parameter of penalty function is provided to promote more sparsity without sacrificing the uniqueness of the solution and robustness of convex optimization. Our method is computationally efficient due to the utilization of the Alternating Direction Method of Multipliers (ADMM) and Majorization-Minimization (MM). Experimental results on three real-world benchmark datasets, i.e., AR face database, PIE face database and MNIST handwritten digits database, demonstrate that KGSRSN can achieve more discriminative sparse coefficients, and it outperforms many state-of-the-art approaches for classification with respect to both recognition rates and running time.

Item Type:Article
ISSN:0925-2312
Uncontrolled Keywords:sparse representation; locality constraint; group sparse; kernel trick; non-convex penalty
Group:Faculty of Media & Communication
ID Code:30568
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:12 Apr 2018 09:17
Last Modified:12 Apr 2018 09:34

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