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A method for improving wavelet threshold denoising in laser-induced breakdown spectroscopy
Zhang B(张博); Sun LX(孙兰香); Yu HB(于海斌); Xin Y(辛勇); Cong ZB(丛智博)
Department工业控制网络与系统研究室
Source PublicationSpectrochimica Acta - Part B Atomic Spectroscopy
ISSN0584-8547
2015
Volume107Pages:32-44
Indexed BySCI ; EI
EI Accession number20151100641479
WOS IDWOS:000354155100005
Contribution Rank1
KeywordLaser-induced Breakdown Spectroscopy Wavelet Threshold Denoising Decomposition Level
AbstractThe wavelet threshold denoising method is an effective noise suppression approach for noisy laser-induced breakdown spectroscopy signal. In this paper, firstly, the noise sources of LIBS system are summarized. Secondly, wavelet multi-resolution analysis and wavelet threshold denoising method are introduced briefly. As one of the major factors influencing the denoising results in the process of wavelet threshold denoising, the optimal decomposition level selection is studied. Based on the entropy analysis of noisy LIBS signal and noise, a method of choosing optimal decomposition level is presented. Thirdly, the performance of the proposed method is verified by analyzing some synthetic signals. Not only the denoising results of the synthetic signals are analyzed, but also the ultimate denoising capacity of the wavelet threshold denoising method with the optimal decomposition level is explored. Finally, the experimental data analysis implies that the fluctuation of the noisy LIBS signals can be decreased and the weak LIBS signals can be recovered. The optimal decomposition level is able to improve the performance of the denoising results obtained by wavelet threshold denoising with non-optimal wavelet functions. The signal to noise ratios of the elements are improved and the limit of detection values are reduced by more than 50% by using the proposed method.
Language英语
WOS HeadingsScience & Technology ; Technology
WOS SubjectSpectroscopy
WOS KeywordSIGNAL ENHANCEMENT ; TRANSFORM ; LIBS ; OPTIMIZATION ; LEAD
WOS Research AreaSpectroscopy
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/15780
Collection工业控制网络与系统研究室
Corresponding AuthorSun LX(孙兰香)
Affiliation1.Lab. of Networked Control Systems, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, China
2.University of the Chinese Academy of Sciences, Beijing, China
Recommended Citation
GB/T 7714
Zhang B,Sun LX,Yu HB,et al. A method for improving wavelet threshold denoising in laser-induced breakdown spectroscopy[J]. Spectrochimica Acta - Part B Atomic Spectroscopy,2015,107:32-44.
APA Zhang B,Sun LX,Yu HB,Xin Y,&Cong ZB.(2015).A method for improving wavelet threshold denoising in laser-induced breakdown spectroscopy.Spectrochimica Acta - Part B Atomic Spectroscopy,107,32-44.
MLA Zhang B,et al."A method for improving wavelet threshold denoising in laser-induced breakdown spectroscopy".Spectrochimica Acta - Part B Atomic Spectroscopy 107(2015):32-44.
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