两种棉纤维傅里叶拉曼光谱特征提取方法的对比

Comparative study on feature extractions of FT Raman spectra for cotton fiber

基于棉纤维傅里叶(FT)拉曼光谱特性,分别采用"方差权特征提取法"和"极限基线校正特征提取法"提取棉FT拉曼光谱的特征峰。结果表明:当提取特征峰个数为4,阈值分别为0.2、0.175时,这两种方法的特征峰位移均在1 097、1 120、2 894、1380 cm^(-1)处,且特征峰强度从高至低的排列顺序为1 097 cm^(-1)、1 120 cm^(-1)、2 896 cm^(-1)、1 380 cm^(-1)。结果认为,这两种方法虽特点不同,但用于棉纤维FT拉曼光谱特征提取时,有较好的一致性。

According to the characteristics of the FT Raman spectra for cotton fiber, the feature peaks of FT Raman spectra for cotton fiber are extracted through two methods of the feature extraction based on the variance or limit baseline correction respectively. The results show that when the extraction number of feature peak is 4 and the threshold value is 0.2 and 0.175 respectively, the peaks of extracted feature appear at 1 097 cm-1, 1 120 cm-1 , 2 894 cm -1 and 1 380 cm- 1, meanwhile the order of the feature intensity of two methods is 1 097 cm -1, 1 120 cm-1 , 2 896 cm-1 , 1 380 cm-1. The results show that although the characteristics of two kinds of methods are different, there is better consistency in extracted features of FT Raman spectra for cotton fiber.