A nonlocal filter for local denoising using the Wigner transform

doi:10.1016/j.optlaseng.2019.05.029

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	A nonlocal filter for local denoising using the Wigner transform
	Chu, Junqiu 1,2,3; Ma, Haotong 1,2,3; Ren, Ge 1,2,3; Qi, Bo 1,2,3
刊名	Optics and Lasers in Engineering
	2019-11-02
卷号	122 页码:105-112
关键词	Image process Computational optical imaging Wigner transform Optical field imaging Local denoising
ISSN号	0143-8166
DOI	10.1016/j.optlaseng.2019.05.029
文献子类	期刊论文
英文摘要	Nonlocal means denoising (NLM) and block-matching and 3D filtering (BM3D) have become the most popular algorithms for image processing. The disadvantage of these methods is that they cannot be realized by hardware implementation. The Wigner distribution function (WDF) has advantages such as explicit physical meaning, spatial frequency distribution of each pixel, and suitability for optical implementation. In recent years, the wide-field imaging system has been used extensively in multiple situations such as aviation, medicine, and traffic. Large-field images often have multiple point spread functions (PSF) and local random noise. However, the results have shown that most nonlocal filters have inadequate effects on local noise filtering. This paper analytically examines the Wigner transform of a multi-Gaussian function and investigates the effects of cross-term and noise on filter reconstruction in image processing. Based on the results, a new space-variant filter with a simple mathematical formula is proposed and applied to local high-frequency noise filtering. Since the filter is closely related to the intensity distribution in the spatial and frequency domains, it provides a simple way to process local noise while simultaneously preserving the high-frequency information of the image. © 2019
WOS关键词	CROSS-TERMS ; VILLE DISTRIBUTION ; SUPPRESSION ; ELIMINATION
WOS研究方向	Optics
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000500224400013
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/9757]
专题	光电技术研究所_光电工程总体研究室（一室）
作者单位	1.Chinese Academy of Sciences, Institute of Optics and Electronics, Chengdu; 610209, China; 2.Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu; 610209, China 3.University of Chinese Academy of Sciences, Beijing; 101408, China;
推荐引用方式 GB/T 7714	Chu, Junqiu,Ma, Haotong,Ren, Ge,et al. A nonlocal filter for local denoising using the Wigner transform[J]. Optics and Lasers in Engineering,2019,122:105-112.
APA	Chu, Junqiu,Ma, Haotong,Ren, Ge,&Qi, Bo.(2019).A nonlocal filter for local denoising using the Wigner transform.Optics and Lasers in Engineering,122,105-112.
MLA	Chu, Junqiu,et al."A nonlocal filter for local denoising using the Wigner transform".Optics and Lasers in Engineering 122(2019):105-112.