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| 基于小波变换的木材近红外光谱去噪研究 | |
| 引用本文： | 王学顺,戚大伟,黄安民.基于小波变换的木材近红外光谱去噪研究[J].光谱学与光谱分析,2009,29(8):2059-2062. |
| 作者姓名： | 王学顺 戚大伟 黄安民 |
| 作者单位： | 1. 北京林业大学理学院,北京,100083;东北林业大学理学院,黑龙江,哈尔滨,150040 2. 东北林业大学理学院,黑龙江,哈尔滨,150040 3. 中国林业科学研究院木材工业研究所,北京,100091 |
| 基金项目： | 中央级公益性科研院所专项基金，国家自然科学基金重点项目 |
| 摘 要： | 木材近红外光谱常常被一系列噪声所污染,影响光谱分析结果.为了提高近红外光谱分析精度,需要对光谱数据进行预处理.光谱导数可以消除光谱背景干扰和基线漂移等因素影响,提高光谱分辨率,但导数光谱在增强信号的同时,也使信号噪声得到增强.应用小波变换对杉木木材近红外一阶导数光谱进行去噪研究,分别采用9点平滑法、25点平滑法、非线件小波硬阈值和软阈值法、9点平滑+小波变换法和25点平滑+小波变换法对光谱数据进行去噪研究.结果显示,小波变换能够有效去除导数光谱中的噪声信号,保留光谱中的有效信息,提高光谱信噪比,提高光谱的分析能力,在木材近红外光谱分析中具有很好的应用前景. |
| 关 键 词： | 近红外光谱 小波变换 去噪 |
| 收稿时间： | 2008/5/10 |
Study on Denoising Near Infrared Spectra of Wood Based on Wavelet Transform |
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| WANG Xue-shun,QI Da-wei,HUANG An-min.Study on Denoising Near Infrared Spectra of Wood Based on Wavelet Transform[J].Spectroscopy and Spectral Analysis,2009,29(8):2059-2062. | |
| Authors: | WANG Xue-shun QI Da-wei HUANG An-min |
| Institution: | WANG Xue-shun1,2,QI Da-wei2,HUANG An-min3*1. College of Science,Beijing Forest University,Beijing 100083,China2. College of Science,Northeast Forest University,Harbin 150040,China3. Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,China |
| Abstract: | Near infrared (NIR) spectra of wood samples are often confused by a series of noise,which greatly influences accurate analytical result. In order to improve analytical precision,the authors need to pretreat the spectrum data. Derivative can correct baseline and background effects,increasing the resolution ratio of the spectra. However,it also increases the noise at the same time. The present paper aims at using wavelet transform to eliminate the noise of the near infrared first derivative spectrum of wood w... |
| Keywords: | Near infrared spectroscopy Wavelet transform Denoising |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |