Context-Aware Sparse Decomposition for Image Denoising and   Super-Resolution

doi:10.1109/TIP.2012.2231690

CORC > 北京大学 > 信息科学技术学院

	Context-Aware Sparse Decomposition for Image Denoising and Super-Resolution
	Ren, Jie ; Liu, Jiaying ; Guo, Zongming
刊名	ieee transactions on image processing
	2013
关键词	Context-aware image denoising image restoration (IR) Markov random fields (MRFs) sparse representation sparsity pattern super-resolution OVERCOMPLETE DICTIONARIES WAVELET-DOMAIN REPRESENTATIONS APPROXIMATION RECOVERY RECONSTRUCTIONS MODEL
DOI	10.1109/TIP.2012.2231690
英文摘要	Image prior models based on sparse and redundant representations are attracting more and more attention in the field of image restoration. The conventional sparsity-based methods enforce sparsity prior on small image patches independently. Unfortunately, these works neglected the contextual information between sparse representations of neighboring image patches. It limits the modeling capability of sparsity-based image prior, especially when the major structural information of the source image is lost in the following serious degradation process. In this paper, we utilize the contextual information of local patches (denoted as context-aware sparsity prior) to enhance the performance of sparsity-based restoration method. In addition, a unified framework based on the markov random fields model is proposed to tune the local prior into a global one to deal with arbitrary size images. An iterative numerical solution is presented to solve the joint problem of model parameters estimation and sparse recovery. Finally, the experimental results on image denoising and super-resolution demonstrate the effectiveness and robustness of the proposed context-aware method.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000318016600017&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic; SCI(E); EI; PubMed; 11; ARTICLE; 4; 1454-1467; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/161714]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Ren, Jie,Liu, Jiaying,Guo, Zongming. Context-Aware Sparse Decomposition for Image Denoising and Super-Resolution[J]. ieee transactions on image processing,2013.
APA	Ren, Jie,Liu, Jiaying,&Guo, Zongming.(2013).Context-Aware Sparse Decomposition for Image Denoising and Super-Resolution.ieee transactions on image processing.
MLA	Ren, Jie,et al."Context-Aware Sparse Decomposition for Image Denoising and Super-Resolution".ieee transactions on image processing (2013).