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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
2006-02-01
发表期刊SPECTROSCOPY AND SPECTRAL ANALYSIS
卷号26期号:2页码:372-376
文章类型Article
摘要The 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.
关键词Convolution Type Of Wavelet Packet Local Correlation Algorithm Astronomical Spectra Spectral Line Extraction
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:000235638800044
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ia.ac.cn/handle/173211/9280
专题09年以前成果
作者单位1.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
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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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