Automatic Recognition of Sunspots in HSOS Full-Disk Solar Images

	Automatic Recognition of Sunspots in HSOS Full-Disk Solar Images
	Zhao, Cui; Lin, GangHua; Deng, YuanYong; Yang, Xiao
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
	2016-05-11
卷号	33
关键词	activity data analysis image processing sunspot
英文摘要	A procedure is introduced to recognise sunspots automatically in solar full-disk photosphere images obtained from Huairou Solar Observing Station, National Astronomical Observatories of China. The images are first pre-processed through Gaussian algorithm. Sunspots are then recognised by the morphological Bot-hat operation and Otsu threshold. Wrong selection of sunspots is eliminated by a criterion of sunspot properties. Besides, in order to calculate the sunspots areas and the solar centre, the solar limb is extracted by a procedure using morphological closing and erosion operations and setting an adaptive threshold. Results of sunspot recognition reveal that the number of the sunspots detected by our procedure has a quite good agreement with the manual method. The sunspot recognition rate is 95% and error rate is 1.2%. The sunspot areas calculated by our method have high correlation (95%) with the area data from the United States Air Force/National Oceanic and Atmospheric Administration (USAF/NOAA).
收录类别	SCI
语种	英语
WOS记录号	WOS:000376298300001
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5385]
专题	国家天文台_太阳物理研究部
作者单位	Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Cui,Lin, GangHua,Deng, YuanYong,et al. Automatic Recognition of Sunspots in HSOS Full-Disk Solar Images[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,2016,33.
APA	Zhao, Cui,Lin, GangHua,Deng, YuanYong,&Yang, Xiao.(2016).Automatic Recognition of Sunspots in HSOS Full-Disk Solar Images.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,33.
MLA	Zhao, Cui,et al."Automatic Recognition of Sunspots in HSOS Full-Disk Solar Images".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA 33(2016).