A novel wavelet multiple thresholding algorithm for astronomical spectral signal denoising
文献类型：期刊论文
| 作者 | Zhao Rui-Zhen; Hu Zhan-Yi ; Hu Shao-Hai
|
| 刊名 | SPECTROSCOPY AND SPECTRAL ANALYSIS
 |
| 出版日期 | 2007-08-01 |
| 卷号 | 27期号:8页码:1644-1647 |
| 关键词 | astronomical spectra wavelet transform multiple threshold denoising |
| 英文摘要 | By using the different relativities of spectral lines and noises in the wavelet domain, a novel wavelet multiple thresholding algorithm is presented in the present paper for astronomical spectra with low signal-noise-ratio (SNR). Firstly the wavelet coefficients are estimated by NeighShrink approach and then 0-1 coefficients are obtained. Based on the above binary coefficients, two kinds of relativity exponents at each scale and across scales respectively are defined for each wavelet coefficients. Finally decision coefficients are determined according to the magnitudes of the relativity exponents. This algorithm overcomes the over-reserving or over-shrinking disadvantages of the simple threshold method in that the decision coefficients are obtained by multiple criteria. Besides, large pulse noises can be removed by the presented algorithm because it takes spectral line features into consideration. The experimental results show that the proposed algorithm is computationally efficient and practical. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Spectroscopy |
| 研究领域[WOS] | Spectroscopy |
| 关键词[WOS] | AUTO-EXTRACTION ; TRANSFORM ; IMAGE ; SHRINKAGE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000249252000048 |
| 公开日期 | 2015-12-24 |
| 源URL | [http://ir.ia.ac.cn/handle/173211/9418]  |
| 专题 | 自动化研究所_09年以前成果 |
| 作者单位 | 1.Beijing Jiao Tong Univ, Sch Comp & Informat Technol, Beijing 100044, Peoples R China 2.Chinese Acad Sci, Inst Automat, Natl Key Lab Pattern Recognit, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao Rui-Zhen,Hu Zhan-Yi,Hu Shao-Hai. A novel wavelet multiple thresholding algorithm for astronomical spectral signal denoising[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2007,27(8):1644-1647. |
| APA | Zhao Rui-Zhen,Hu Zhan-Yi,&Hu Shao-Hai.(2007).A novel wavelet multiple thresholding algorithm for astronomical spectral signal denoising.SPECTROSCOPY AND SPECTRAL ANALYSIS,27(8),1644-1647. |
| MLA | Zhao Rui-Zhen,et al."A novel wavelet multiple thresholding algorithm for astronomical spectral signal denoising".SPECTROSCOPY AND SPECTRAL ANALYSIS 27.8(2007):1644-1647. |
入库方式： OAI收割
来源：自动化研究所
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