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高温拉曼光谱提高信噪比的途径分析
引用本文:陈辉,蒋国昌,尤静林,吴永全.高温拉曼光谱提高信噪比的途径分析[J].光谱学与光谱分析,2007,27(6):1148-1151.
作者姓名:陈辉  蒋国昌  尤静林  吴永全
作者单位:上海大学材料学院,上海,200072
摘    要:结合累积时间分辨和空间分辨建成了上海大学高温拉曼谱仪SU-HTRS(T/S).由于高温噪声的不可避免,采用了移动平均方法,傅里叶变换滤波和小波分析的方法对其进行了数据降噪处理.在不同噪声水平上分析了不同处理方式对谱峰中心位置、强度、面积的影响及处理后数据的光滑度的影响.三种方法比较起来,移动平均法快而简单,小波分析的去噪效果最好.

关 键 词:高温拉曼  降噪  小波  傅里叶
文章编号:1000-0593(2007)06-1148-04
修稿时间:2006-03-182006-06-18

Analysis of Different Methods for Denoising of High Temperature Raman Spectra
CHEN Hui,BANG Guo-chang,YOU Jing-lin,WU Yong-quan.Analysis of Different Methods for Denoising of High Temperature Raman Spectra[J].Spectroscopy and Spectral Analysis,2007,27(6):1148-1151.
Authors:CHEN Hui  BANG Guo-chang  YOU Jing-lin  WU Yong-quan
Institution:School of Material Science and Engineering, Shanghai University, Shanghai 200072, China
Abstract:Combined with time accumulated resolution and space resolution the SU-HTRS(T/S) set has been realized at Shanghai University.It is impossible to avoid noise at high temperature,so different mathematic methods,such as Savitzky-Golay method,FFT and wavelet methods have been adopted for denoising.For various noise levels,the effects of three methods on the peak location,intensity and covering area as well as the smoothing degree of the reduced spectra were analyzed.It can be concluded that Savitzky-Golay method is simple and quick,while wavelet method offers the best results in denoising process.
Keywords:High temperature Raman  Denoising  Wavelet  FFT
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