CASIA OpenIR  > 09年以前成果
A new automatic quasars recognition technique based on PCA and Hough transform
Huang, LY; Hu, ZY
AbstractThe 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%.
KeywordQuasar Redshift Principal Component Analysis (Pca) Standard Hough Transform (Sht)
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS Research AreaSpectroscopy
WOS SubjectSpectroscopy
WOS IDWOS:000181586700052
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Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
AffiliationChinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100080, Peoples R China
Recommended Citation
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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