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Enhancing coronal structures with radial local multi-scale filter
Qiang, Zhenping1,2; Bai, Xianyong2; Ji KF(季凯帆)3; Liu, Hui3; Shang, Zhenhong4
Source PublicationNEW ASTRONOMY
2020-08-01
Volume79Pages:12
DOI10.1016/j.newast.2020.101383
Contribution Rank第3完成单位
Indexed BySCI
KeywordCoronal enhancement Image processing Radial local multi-scale filter Solar corona
Abstract

Images 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.

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[11603016, 11873027, 11773072, 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
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳与太阳系其他学科 ; 计算机科学技术
MOST Discipline Catalogue理学 ; 理学::天文学 ; 工学 ; 工学::计算机科学与技术(可授工学、理学学位)
SubtypeArticle
PublisherELSEVIER
Publication PlaceRADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
WOS IDWOS:000531097200002
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/23403
Collection抚仙湖太阳观测站
Corresponding AuthorQiang, Zhenping
Affiliation1.College of Big Data and Intelligent Engineering, Southwest Forestry University, Kunming 650224, China
2.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Beijing 100012, China
3.Yunnan Observatory, Chinese Academy of Sciences, Kunming, 650216 China
4.Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, 650504 China
Recommended Citation
GB/T 7714
Qiang, Zhenping,Bai, Xianyong,Ji KF,et al. Enhancing coronal structures with radial local multi-scale filter[J]. NEW ASTRONOMY,2020,79:12.
APA Qiang, Zhenping,Bai, Xianyong,Ji KF,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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