基于特征波段-Fisher-K近邻的木器漆拉曼光谱的快速无损鉴别 
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Rapid Nondestructive Identification of Wood Lacquer Using Raman Spectroscopy Based on Characteristic-Band-Fisher-K Nearest Neighbor
中国人民公安大学刑事科学技术学院, 北京 100038
图 & 表
图 1. CY003样品拉曼光谱图的预处理结果。(a) BL;(b)九点平滑法;(c)一阶导数;(d)二阶导数
Fig. 1. Preprocessing results of Raman spectra of CY003 samples. (a) BL; (b) nine-point smoothing; (c) first derivative; (d) second derivative
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图 2. 根据特征波段比值法获得的3个木器漆品牌样本分类图
Fig. 2. Classification of three brands of woodlacquer samples obtained by characteristic-band ratio method
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图 3. 3个品牌木器漆样本在函数1和函数2上建立的判别分布图
Fig. 3. Discriminant distribution of three brands of woodlacquer samples obtained by functions 1 and 2
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表 16个样本的基本信息
Table1. Basic information of six samples of wood lacquer
| Number | Brand | Category | Manufacturer |
|---|
| CY003 | CYSO | Water-basedmultifunctional paint | CYSO | | CY008 | CYSO | Water-basedmultifunctional paint | CYSO | | HC004 | HUACAI | Water-basedpaint | Chaomeiyaqi | | HC013 | HUACAI | Water-basedpaint | Chaomeiyaqi | | QS001 | TRYKON | Waterbornefurniture finish | Changfeng | | QS010 | TRYKON | Waterbornefurniture finish | Changfeng |
|
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表 2不同预处理方法的判别结果
Table2. Discriminant results of different preprocessing methods
| Index | Original spectrum | BL+Smoothing | BL+Smoothing+1st derivative | BL+Smoothing+2nd derivative |
|---|
| Overall accuracy /% | 68.0 | 79.8 | 96.0 | 100 | | Number of errors | 55 | 35 | 7 | 0 | | Cross validation rate /% | 65.1 | 69.4 | 94.1 | 100 |
|
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表 3Fisher函数判别摘要表
Table3. Summary of Fisher-function discriminant
| Function | Eigen value | Cumulative variance | Regular correlation | Test function | Wilks’ Lambda | Significance |
|---|
| 1 | 113.871 | 90.1 | 0.996 | 1 and 2 | 0.001 | 0 | | 2 | 12.455 | 100 | 0.962 | 1 | 0.074 | 0.041 |
|
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表 4两组模型下各样本的分类结果
Table4. Classification results of samples for two models
| Spectral type | Overall accuracy /% | Cross validationrate /% |
|---|
| Fisher | KNN |
|---|
| BL+Smoothing+1st derivative | 96 | 79.2 | 100 | | BL+Smoothing+2nd derivative | 100 | 88.5 | 100 |
|
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何亚, 王继芬. 基于特征波段-Fisher-K近邻的木器漆拉曼光谱的快速无损鉴别[J]. 激光与光电子学进展, 2020, 57(1): 013001. Ya He, Jifen Wang. Rapid Nondestructive Identification of Wood Lacquer Using Raman Spectroscopy Based on Characteristic-Band-Fisher-K Nearest Neighbor[J]. Laser & Optoelectronics Progress, 2020, 57(1): 013001.
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