中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
High-resolution Solar Image Reconstruction Based on Non-rigid Alignment

文献类型:期刊论文

作者Liu H(刘辉); Jin ZY(金振宇); Xiang YY(向永源); Ji KF(季凯帆)
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2022-09-01
卷号22期号:9
ISSN号1674-4527
关键词methods: data analysis techniques: image processing Sun: chromosphere Sun: photosphere instrumentation: high angular resolution
DOI10.1088/1674-4527/ac7cba
产权排序第1完成单位
文献子类Article
英文摘要

Suppressing the interference of atmospheric turbulence and obtaining observation data with a high spatial resolution are an issue to be solved urgently for ground observations. One way to solve this problem is to perform a statistical reconstruction of short-exposure speckle images. Combining the rapidity of Shift-Add and the accuracy of speckle masking, this paper proposes a novel reconstruction algorithm-NASIR (Non-rigid Alignment based Solar Image Reconstruction). NASIR reconstructs the phase of the object image at each frequency by building a computational model between geometric distortion and intensity distribution and reconstructs the modulus of the object image on the aligned speckle images by speckle interferometry. We analyzed the performance of NASIR by using the correlation coefficient, power spectrum, and coefficient of variation of intensity profile in processing data obtained by the NVST (1 m New Vacuum Solar Telescope). The reconstruction experiments and analysis results show that the quality of images reconstructed by NASIR is close to speckle masking when the seeing is good, while NASIR has excellent robustness when the seeing condition becomes worse. Furthermore, NASIR reconstructs the entire field of view in parallel in one go, without phase recursion and block-by-block reconstruction, so its computation time is less than half that of speckle masking. Therefore, we consider NASIR is a robust and high-quality fast reconstruction method that can serve as an effective tool for data filtering and quick look.

学科主题天文学 ; 太阳与太阳系 ; 太阳与太阳系其他学科 ; 计算机科学技术 ; 计算机应用 ; 计算机图象处理
URL标识查看原文
出版地20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
WOS关键词TELESCOPE
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:000838327200001
资助机构National Natural Science Foundation of China (NSFC)[11873027, U2031140, 12073077, 11833010, 11973088] ; West Light Foundation of the Chinese Academy of Sciences[Y9XB01A, Y9XB019]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/25529]  
专题天文技术实验室
云南天文台_抚仙湖太阳观测站
通讯作者Liu H(刘辉)
作者单位Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; liuhui@ynao.ac.cn
推荐引用方式
GB/T 7714
Liu H,Jin ZY,Xiang YY,et al. High-resolution Solar Image Reconstruction Based on Non-rigid Alignment[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2022,22(9).
APA Liu H,Jin ZY,Xiang YY,&Ji KF.(2022).High-resolution Solar Image Reconstruction Based on Non-rigid Alignment.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,22(9).
MLA Liu H,et al."High-resolution Solar Image Reconstruction Based on Non-rigid Alignment".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 22.9(2022).

入库方式: OAI收割

来源:云南天文台

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