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A method tor auto-extraction of spectral lines based on convolution type of wavelet packet transformation
Liu, ZT; Wu, FC; Luo, AL; Zhao, YH
Source PublicationSPECTROSCOPY AND SPECTRAL ANALYSIS
2006-02-01
Volume26Issue:2Pages:372-376
SubtypeArticle
AbstractThe important astrophysical information is hidden in spectral lines of astronomical spectra. The presen paper presents a method for auto-extraction of spectral lines based on convolution type of wavelet packet. This method consists of four main steps: First, the observed spectra are transformed by convolution type of wavelet packet with 4(th) scale. Then, the noise with coefficients of the 4(th) scale is eliminated by the local correlation algorithm and threshold in the wavelet packet domain. After that, middle and high frequency coefficients are selected to reconstruct the feature of the spectral lines. Finally, with the reconstructed feature of the spectral lines, spectral lines in observed spectra are searched. The results of our experiments, which include the spectral lines of stars, normal galaxies and active galaxies, show that the method can robustly and accurately extract the spectral lines. The method was applied to extract the SDSS spectral lines and compute the redshifts with those lines. By comparing the redshifts with those given by SDSS, the extraction has proven successful and practical.
KeywordConvolution Type Of Wavelet Packet Local Correlation Algorithm Astronomical Spectra Spectral Line Extraction
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
Language英语
WOS Research AreaSpectroscopy
WOS SubjectSpectroscopy
WOS IDWOS:000235638800044
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ia.ac.cn/handle/173211/9280
Collection09年以前成果
Affiliation1.Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Liu, ZT,Wu, FC,Luo, AL,et al. A method tor auto-extraction of spectral lines based on convolution type of wavelet packet transformation[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2006,26(2):372-376.
APA Liu, ZT,Wu, FC,Luo, AL,&Zhao, YH.(2006).A method tor auto-extraction of spectral lines based on convolution type of wavelet packet transformation.SPECTROSCOPY AND SPECTRAL ANALYSIS,26(2),372-376.
MLA Liu, ZT,et al."A method tor auto-extraction of spectral lines based on convolution type of wavelet packet transformation".SPECTROSCOPY AND SPECTRAL ANALYSIS 26.2(2006):372-376.
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