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Improved vector-extrapolation-based Richardson–Lucy algorithm used for wavefront coded imaging
Zhao, Hui1; Xia, Jingjing1,2; Zhang, Ling1,3; Fan, Xuewu1
Department空间光学技术研究室
2019-05-01
Source PublicationApplied Optics
ISSN1559128X;21553165
Volume58Issue:13Pages:3630-3638
Contribution Rank1
Abstract

The Richardson–Lucy (RL) algorithm is a well-known nonlinear restoration method and has been widely applied in the fields of astronomical image restoration, microscopic image restoration, and so on because of its capability of generating high-quality restoration results and potential in realizing super-resolution. However, when being applied to restore the wavefront coded blurry images, the classical RL algorithm converges very slowly and has to be iterated many times before obtaining a satisfactory result, which severely prohibits its real-time application. Vector-extrapolation-based RL algorithm was invented to solve this problem, but the noise amplification increases fast, and additional post-processing is needed to further improve the signal-to-noise ratio. Therefore, in this paper, an improved RL algorithm is proposed by introducing an exponential modified correction term into the framework of the original vector-extrapolation-based RL algorithm. It not only results in a bigger iteration step, which ensures a faster convergence can be obtained, but also the noise amplification is effectively prohibited. Besides that, we design a structure-similarity-index-metric-based stopping criterion, based on which the optimum number of iterations for each color channel is obtained. Experimental results reveal that the total iterations decreases approximately 78.9%, and the restored images demonstrate a superior visual quality without denoising additionally. ? 2019 Optical Society of America

DOI10.1364/AO.58.003630
Indexed BySCI ; EI
Language英语
WOS IDWOS:000467539700055
PublisherOSA - The Optical Society
EI Accession Number20192006930706
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.opt.ac.cn/handle/181661/31499
Collection空间光学技术研究室
Corresponding AuthorZhao, Hui
Affiliation1.Space Optics Lab, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710019, China;
2.Shaanxi Normal University, Xi’an; 710119, China;
3.University of Chinese Academy of Sciences, Beijing; 100049, China
Recommended Citation
GB/T 7714
Zhao, Hui,Xia, Jingjing,Zhang, Ling,等. Improved vector-extrapolation-based Richardson–Lucy algorithm used for wavefront coded imaging[J]. Applied Optics,2019,58(13):3630-3638.
APA Zhao, Hui,Xia, Jingjing,Zhang, Ling,&Fan, Xuewu.(2019).Improved vector-extrapolation-based Richardson–Lucy algorithm used for wavefront coded imaging.Applied Optics,58(13),3630-3638.
MLA Zhao, Hui,et al."Improved vector-extrapolation-based Richardson–Lucy algorithm used for wavefront coded imaging".Applied Optics 58.13(2019):3630-3638.
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