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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 H(刘辉)3; Shang, Zhenhong4
发表期刊NEW ASTRONOMY
2020-08-01
卷号79页码:12
DOI10.1016/j.newast.2020.101383
产权排序第3完成单位
收录类别SCI
关键词Coronal enhancement Image processing Radial local multi-scale filter Solar corona
摘要

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.

资助项目National 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
项目资助者National 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
语种英语
学科领域天文学 ; 太阳与太阳系 ; 太阳与太阳系其他学科 ; 计算机科学技术
学科门类理学 ; 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)
文章类型Article
出版者ELSEVIER
出版地RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
WOS记录号WOS:000531097200002
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/23403
专题天文技术实验室
通讯作者Qiang, Zhenping
作者单位1.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
推荐引用方式
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 H,&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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