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FLAT-FIELDING OF SOLAR Hα OBSERVATIONS BASED ON THE MAXIMUM CORRENTROPY CRITERION
Xu,Gao-Gui1; Zheng,Sheng1; Lin,Gang-Hua2; Wang,Xiao-Fan2
2016-08-18
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume827Issue:2
AbstractABSTRACT The flat-field CCD calibration method of Kuhn et al. (KLL) is an efficient method for flat-fielding. However, since it depends on the minimum of the sum of squares error (SSE), its solution is sensitive to noise, especially non-Gaussian noise. In this paper, a new algorithm is proposed to determine the flat field. The idea is to change the criterion of gain estimate from SSE to the maximum correntropy. The result of a test on simulated data demonstrates that our method has a higher accuracy and a faster convergence than KLL’s and Chae’s. It has been found that the method effectively suppresses noise, especially in the case of typical non-Gaussian noise. And the computing time of our algorithm is the shortest.
Keywordastroparticle physics methods: observational Sun: photosphere techniques: image processing
DOI10.3847/0004-637X/827/2/137
Language英语
WOS IDIOP:0004-637X-827-2-137
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/36344
Collection中国科学院国家天文台
Affiliation1.College of Science, China Three Gorges University, Hubei, Yichang 443002, China
2.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
Recommended Citation
GB/T 7714
Xu,Gao-Gui,Zheng,Sheng,Lin,Gang-Hua,et al. FLAT-FIELDING OF SOLAR Hα OBSERVATIONS BASED ON THE MAXIMUM CORRENTROPY CRITERION[J]. The Astrophysical Journal,2016,827(2).
APA Xu,Gao-Gui,Zheng,Sheng,Lin,Gang-Hua,&Wang,Xiao-Fan.(2016).FLAT-FIELDING OF SOLAR Hα OBSERVATIONS BASED ON THE MAXIMUM CORRENTROPY CRITERION.The Astrophysical Journal,827(2).
MLA Xu,Gao-Gui,et al."FLAT-FIELDING OF SOLAR Hα OBSERVATIONS BASED ON THE MAXIMUM CORRENTROPY CRITERION".The Astrophysical Journal 827.2(2016).
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