| 近红外光谱预处理中几种小波消噪方法的分析 |
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| 引用本文： | 郝勇,陈斌,朱锐.近红外光谱预处理中几种小波消噪方法的分析[J].光谱学与光谱分析,2006,26(10):1838-1841. |
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| 作者姓名： | 郝勇 陈斌 朱锐 |
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| 作者单位： | 江苏大学生物与环境工程学院,江苏,镇江,212013;江苏大学生物与环境工程学院,江苏,镇江,212013;江苏大学生物与环境工程学院,江苏,镇江,212013 |
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| 基金项目： | 国家自然科学基金
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江苏省博士后科学基金 |
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| 摘 要： | 以菜籽油的一阶导数近红外光谱为研究对象，探讨小波变换在近红外光谱信号消噪方面的应用，分别采用九点平滑法、小波分解与重构法、非线性小波软阈值法和小波变换模极大值法对导数光谱进行消噪处理并对消噪效果进行比较分析。结果表明，小波变换模极大值光谱消噪法得到了较高的信噪比，小波软阈值法次之，其余两种方法消噪效果较差。小波变换模极大值法有效的保留了光谱的有用信息，为近红外光谱的分析精度和模型的稳健性奠定了良好的基础。
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| 关 键 词： | 近红外光谱 小波变换 消噪 |
| 文章编号： | 1000-0593（2006）10-1838-04 |
| 收稿时间： | 2005-06-22 |
| 修稿时间： | 2005-11-08 |
Analysis of Several Methods for Wavelet Denoising Used in Near Infrared Spectrum Pretreatment |
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| HAO Yong,CHEN Bin,ZHU Rui.Analysis of Several Methods for Wavelet Denoising Used in Near Infrared Spectrum Pretreatment[J].Spectroscopy and Spectral Analysis,2006,26(10):1838-1841. |
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| Authors: | HAO Yong CHEN Bin ZHU Rui |
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| Institution: | College of Biological and Environment Engineering，Jiangsu University，Zhenjiang 212013, China |
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| Abstract: | Based on the wavelet analysis, the noise of the near infrared first derivative spectrum of rapeseed oil is eliminated. Several popular wavelet denoising methods are introduced, including wavelet decomposition and reconstruction method, nonlinear wavelet soft-threshold denoising method, and wavelet transform modulus maxima method, The results show that the wavelet transform modulus maxima method is the best, the nonlinear wavelet soft-threshold method is the second, and other are worse. The wavelet transform modulus maxima method can produce more precise model with little deviation. |
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| Keywords: | Near infrared spectrum Wavelet transform Denoising |
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