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An adaptive loop gain selection for CLEAN deconvolution algorithm

文献类型：期刊论文

作者Zhang, Li1; Xu, Long2; Zhang, Ming3,4; Wu, Zhong-Zu5
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2019-06-01
卷号19期号:6页码:6
ISSN号1674-4527
关键词methods: data analysis techniques: image processing techniques: interferometric
DOI10.1088/1674-4527/19/6/79
通讯作者Zhang, Li(lizhang.science@gmail.com)
英文摘要Radio interferometry significantly improves the resolution of observed images, and the final result also relies heavily on data recovery. The Cotton-Schwab CLEAN (CS-Clean) deconvolution approach is a widely used reconstruction algorithm in the field of radio synthesis imaging. However, parameter tuning for this algorithm has always been a difficult task. Here, its performance is improved by considering some internal characteristics of the data. From a mathematical point of view, a peak signal-to-noise-based (PSNR-based) method was introduced to optimize the step length of the steepest descent method in the recovery process. We also found that the loop gain curve in the new algorithm is a good indicator of parameter tuning. Tests show that the new algorithm can effectively solve the problem of oscillation for a large fixed loop gain and provides a more robust recovery.
WOS研究方向Astronomy & Astrophysics
语种英语
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号WOS:000470875400004
源URL[http://libir.pmo.ac.cn/handle/332002/27554]  
专题中国科学院紫金山天文台
通讯作者Zhang, Li
作者单位1.Guizhou Univ, Coll Big Data & Informat Engn, Guiyang 550025, Guizhou, Peoples R China
2.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
4.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China
5.Guizhou Univ, Coll Phys, Guiyang 550025, Guizhou, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Li,Xu, Long,Zhang, Ming,et al. An adaptive loop gain selection for CLEAN deconvolution algorithm[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(6):6.
APA Zhang, Li,Xu, Long,Zhang, Ming,&Wu, Zhong-Zu.(2019).An adaptive loop gain selection for CLEAN deconvolution algorithm.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(6),6.
MLA Zhang, Li,et al."An adaptive loop gain selection for CLEAN deconvolution algorithm".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.6(2019):6.

入库方式： OAI收割

来源：紫金山天文台

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