High-performance parallel image reconstruction for the New Vacuum Solar Telescope

	High-performance parallel image reconstruction for the New Vacuum Solar Telescope
	Li XB(李雪宝)1,2 ; Liu Z(刘忠)1,2 ; Wang F(王锋)1,2,3 ; Jin ZY(金振宇)1,2 ; Xiang YY(向永源)1,2 ; Zheng YF(郑艳芳)1,2,4
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2015-06
卷号	67 期号:3
关键词	methods: observational techniques: image processing telescopes
ISSN号	0004-6264
通讯作者	Li, XB (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	Many technologies have been developed to help improve spatial resolution of observational images for ground-based solar telescopes, such as adaptive optics (AO) systems and post-processing reconstruction. As any AO system correction is only partial, it is indispensable to use post-processing reconstruction techniques. In the New Vacuum Solar Telescope (NVST), a speckle-masking method is used to achieve the diffraction-limited resolution of the telescope. Although the method is very promising, the computation is quite intensive, and the amount of data is tremendous, requiring several months to reconstruct observational data of one day on a high-end computer. To accelerate image reconstruction, we parallelize the program package on a high-performance cluster. We describe parallel implementation details for several reconstruction procedures. The code is written in the C language using the Message Passing Interface (MPI) and is optimized for parallel processing in a multiprocessor environment. We show the excellent performance of parallel implementation, and the whole data processing speed is about 71 times faster than before. Finally, we analyze the scalability of the code to find possible bottlenecks, and propose several ways to further improve the parallel performance. We conclude that the presented program is capable of executing reconstruction applications in real-time at NVST.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	MULTIFRAME BLIND DECONVOLUTION ; ADAPTIVE OPTICS SYSTEM ; PHASE-DIVERSITY ; SPECKLE MASKING ; RESOLUTION ; OBJECTS
收录类别	SCI
原文出处	http://pasj.oxfordjournals.org/content/67/3/47
语种	英语
WOS记录号	WOS:000356182500018
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4715]
专题	云南天文台_抚仙湖太阳观测站
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, China, 650011 2.University of Chinese Academy of Sciences, Beijing, China, 100049 3.Computer Technology Application Key Lab of Yunnan Province, Kunming University of Science and Technology, Chenggong, Kunming, China, 650500 4.Jiangsu University of Science and Technology, Zhangjiagang, China, 215600
推荐引用方式 GB/T 7714	Li XB,Liu Z,Wang F,et al. High-performance parallel image reconstruction for the New Vacuum Solar Telescope[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2015,67(3).
APA	Li XB,Liu Z,Wang F,Jin ZY,Xiang YY,&Zheng YF.(2015).High-performance parallel image reconstruction for the New Vacuum Solar Telescope.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,67(3).
MLA	Li XB,et al."High-performance parallel image reconstruction for the New Vacuum Solar Telescope".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 67.3(2015).