L0 Sparsity for Image Denoising with Local and Global Priors. (4th November 2015)

• Record Type: Journal Article
• Authors: Gao, Xiaoni; Yu, Mei; Wang, Jianrong; Wei, Jianguo
• Other Names: Kollias Stefanos Academic Editor.
• Is Part Of: Advances in multimedia. Volume 2015(2015)
• Publication Date: 2015-11-04
• Subjects: Multimedia systems -- Periodicals; Computer networks -- Periodicals; Multimédia; Réseaux d'ordinateurs; Computer networks; Multimedia systems; Periodicals; 006.7
• DOI: 10.1155/2015/386134
• Languages: English
• ISSNs: 1687-5680

Abstract

Abstract : We propose a l 0 sparsity based approach to remove additive white Gaussian noise from a given image. To achieve this goal, we combine the local prior and global prior together to recover the noise-free values of pixels. The local prior depends on the neighborhood relationships of a search window to help maintain edges and smoothness. The global prior is generated from a hierarchical l 0 sparse representation to help eliminate the redundant information and preserve the global consistency. In addition, to make the correlations between pixels more meaningful, we adopt Principle Component Analysis to measure the similarities, which can be both propitious to reduce the computational complexity and improve the accuracies. Experiments on the benchmark image set show that the proposed approach can achieve superior performance to the state-of-the-art approaches both in accuracy and perception in removing the zero-mean additive white Gaussian noise.