NAOC Open IR
Enhancing coronal structures with radial local multi-scale filter
Qiang, Zhenping1,2; Bai, Xianyong2; Ji, Kaifan3; Liu, Hui3; Shang, Zhenhong4
2020-08-01
Source PublicationNEW ASTRONOMY
ISSN1384-1076
Volume79Pages:12
AbstractImages of the corona contain information over a wide range of spatial scales and various structures such as coronal holes, coronal loops, coronal mass ejections (CMEs), and helmet streamers with differences in brightness. Therefore, processing these images is important for determining various types of information. However, it is very difficult to elucidate the intricate structure of the corona because of the steep radial gradient in terms of brightness and the large differences in brightness within local areas of coronal images. In this study, we present a filter inspired by the normalizing-radial-graded filter, which we call the radial local multi-scale filter (RLMF). The RLMF method extracts radial vectors and performs local multi-scale filtering based on each vector, before normalizing the vector in order to enhance coronal images. This method facilitates the enhancement of large-scale structural characteristics and fine details in low contrast regions. To demonstrate the power of the RLMF, we applied the proposed method to Large Angle and Spectrometric Coronagraph C2 and K-Coronagraph observations. The RLMF method more clearly revealed the fine details of the corona and CMEs compared with the original observations.
KeywordCoronal enhancement Image processing Radial local multi-scale filter Solar corona
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Scientific Research Foundation Project of Southwest Forestry University ; Key Scientific Research Foundation Project of Southwest Forestry University ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Beijing Municipal Science and Technology Project ; Beijing Municipal Science and Technology Project ; NASA LWS ; NASA LWS ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Scientific Research Foundation Project of Southwest Forestry University ; Key Scientific Research Foundation Project of Southwest Forestry University ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Beijing Municipal Science and Technology Project ; Beijing Municipal Science and Technology Project ; NASA LWS ; NASA LWS ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Scientific Research Foundation Project of Southwest Forestry University ; Key Scientific Research Foundation Project of Southwest Forestry University ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Beijing Municipal Science and Technology Project ; Beijing Municipal Science and Technology Project ; NASA LWS ; NASA LWS ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Scientific Research Foundation Project of Southwest Forestry University ; Key Scientific Research Foundation Project of Southwest Forestry University ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Beijing Municipal Science and Technology Project ; Beijing Municipal Science and Technology Project ; NASA LWS ; NASA LWS ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; National Science Foundation ; National Science Foundation
DOI10.1016/j.newast.2020.101383
Language英语
Funding ProjectNational Natural Science Foundation of China[11603016] ; National Natural Science Foundation of China[11873027] ; National Natural Science Foundation of China[11773072] ; National Natural Science Foundation of China[11573012] ; Key Scientific Research Foundation Project of Southwest Forestry University[111827] ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories[KLSA201909] ; Beijing Municipal Science and Technology Project[Z181100002918004] ; NASA LWS[NNX15AB70G] ; Astronomical Big Data Joint Research Center ; National Science Foundation
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Scientific Research Foundation Project of Southwest Forestry University ; Key Scientific Research Foundation Project of Southwest Forestry University ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Beijing Municipal Science and Technology Project ; Beijing Municipal Science and Technology Project ; NASA LWS ; NASA LWS ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Scientific Research Foundation Project of Southwest Forestry University ; Key Scientific Research Foundation Project of Southwest Forestry University ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Beijing Municipal Science and Technology Project ; Beijing Municipal Science and Technology Project ; NASA LWS ; NASA LWS ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Scientific Research Foundation Project of Southwest Forestry University ; Key Scientific Research Foundation Project of Southwest Forestry University ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Beijing Municipal Science and Technology Project ; Beijing Municipal Science and Technology Project ; NASA LWS ; NASA LWS ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Scientific Research Foundation Project of Southwest Forestry University ; Key Scientific Research Foundation Project of Southwest Forestry University ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Open Research Program of CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Beijing Municipal Science and Technology Project ; Beijing Municipal Science and Technology Project ; NASA LWS ; NASA LWS ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; National Science Foundation ; National Science Foundation
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000531097200002
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/83501
Collection中国科学院国家天文台
Corresponding AuthorQiang, Zhenping
Affiliation1.Southwest Forestry Univ, Coll Big Data & Intelligent Engn, Kunming 650224, Yunnan, Peoples R China
2.Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100012, Peoples R China
3.Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China
4.Kunming Univ Sci & Technol, Fac Informat Engn & Automat, Kunming 650504, Yunnan, Peoples R China
Recommended Citation
GB/T 7714
Qiang, Zhenping,Bai, Xianyong,Ji, Kaifan,et al. Enhancing coronal structures with radial local multi-scale filter[J]. NEW ASTRONOMY,2020,79:12.
APA Qiang, Zhenping,Bai, Xianyong,Ji, Kaifan,Liu, Hui,&Shang, Zhenhong.(2020).Enhancing coronal structures with radial local multi-scale filter.NEW ASTRONOMY,79,12.
MLA Qiang, Zhenping,et al."Enhancing coronal structures with radial local multi-scale filter".NEW ASTRONOMY 79(2020):12.
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