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A new automatic quasars recognition technique based on PCA and Hough transform
Huang, LY; Hu, ZY
2003-02-01
发表期刊SPECTROSCOPY AND SPECTRAL ANALYSIS
卷号23期号:1页码:187-191
文章类型Article
摘要The main purpose of quasar recognition is to determine the observed quasar spectrum's redshift value. Previously the template of quasar rest frame in the literature was basically constructed based on astronomers' hypotheses, Due to the inaccuracy of such a template, it is hard to determine the redshift value by matching the observed quasar spectrum with the template directly. This paper's main contributions are two-fold: Firstly, the template in our paper is constructed by the principal component analysis (PCA) method from some selected spectra with known redshift values, hence the obtained template is more realistic. Secondly, a 2D standard Hough transform, rather than a 1D Hough transform, is used. This is because although only redshift needs to be determined in our system, based on our observations, the magnitude of emission peak is also changed, hence a new parameter, namely scale parameter, is also introduced to the Hough transform to enhance the reliability of the recognition. The experiments show that the proposed technique is workable and the correct recognition rate can reach about as high as 90%.
关键词Quasar Redshift Principal Component Analysis (Pca) Standard Hough Transform (Sht)
WOS标题词Science & Technology ; Technology
收录类别SCI
语种英语
WOS研究方向Spectroscopy
WOS类目Spectroscopy
WOS记录号WOS:000181586700052
引用统计
文献类型期刊论文
条目标识符http://ir.ia.ac.cn/handle/173211/9902
专题09年以前成果
作者单位Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100080, Peoples R China
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GB/T 7714
Huang, LY,Hu, ZY. A new automatic quasars recognition technique based on PCA and Hough transform[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2003,23(1):187-191.
APA Huang, LY,&Hu, ZY.(2003).A new automatic quasars recognition technique based on PCA and Hough transform.SPECTROSCOPY AND SPECTRAL ANALYSIS,23(1),187-191.
MLA Huang, LY,et al."A new automatic quasars recognition technique based on PCA and Hough transform".SPECTROSCOPY AND SPECTRAL ANALYSIS 23.1(2003):187-191.
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