NAOC Open IR  > 光学天文研究部
A convergent mean shift algorithm to select targets for LAMOST
Li, Guang-Wei; Zhao, Gang
2009-07-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume9Issue:7Pages:803-811
AbstractThis paper firstly finds that the Mean Shift Algorithm used by the Observation Control System (OCS) Research Group of the University of Science and Technology of China in Survey Strategy System 2.10 (SSS2.10) to select targets for the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) is not convergent in theory. By carefully studying the mathematical formulation of the Mean Shift Algorithm, we find that it tries to find a point where some objective function achieves its maximum value; the Mean Shift Vector can be regarded as the ascension direction for the objective function. If we regard the objective function as the numerical description for the imaging quality of all targets covered by the focal panel, then the Mean Shift Algorithm can find the place where the imaging quality is the best. So, the problem of selecting targets is equal to the problem of finding the place where the imaging quality is the best. In addition, we also give some effective heuristics to improve computational speed and propose an effective method to assign point sources to the respective fibers. As a result, our program runs fast, and it costs only several seconds to generate an observation.
KeywordMethods: Data Analysis Methods: Statistical
Indexed BySCI
Language英语
WOS IDWOS:000268130300009
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7965
Collection光学天文研究部
AffiliationChinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Li, Guang-Wei,Zhao, Gang. A convergent mean shift algorithm to select targets for LAMOST[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2009,9(7):803-811.
APA Li, Guang-Wei,&Zhao, Gang.(2009).A convergent mean shift algorithm to select targets for LAMOST.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,9(7),803-811.
MLA Li, Guang-Wei,et al."A convergent mean shift algorithm to select targets for LAMOST".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 9.7(2009):803-811.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Guang-Wei]'s Articles
[Zhao, Gang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Guang-Wei]'s Articles
[Zhao, Gang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Guang-Wei]'s Articles
[Zhao, Gang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.