Xiangjun Xu, Xianshuang Wang, Angze Li, Yage He, Yufei Liu, Feng He, Wei Guo, Ruibin Liu. Fast Classification of Tea Varieties Based on Laser-Induced Breakdown Spectroscopy[J]. Chinese Journal of Lasers, 2019, 46(3): 0311003
- Chinese Journal of Lasers
- Vol. 46, Issue 3, 0311003 (2019)
Fig. 1. Experimental diagram
Fig. 2. LIBS spectra of BMD tea. (a) Original spectrum; (b) spectrum after removing background
Fig. 3. Spectra of BMD tea after peak drift correction
Fig. 4. LIBS spectra of BMD tea. (a) Wavelength range of 200-430 nm; (b) wavelength range of 430-720 nm
Fig. 5. Rate of interpretation of principal component to original data. (a) Rate of interpretation of each principal component; (b) cumulative interpretation rate of principal components
Fig. 6. Three-dimensional scatter plot of first three principal components
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Table 1. Classification results of three kinds of tea based on SVM model
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Table 2. Classification results of five kinds of green tea based on SVM model
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Table 3. Classification results of five kinds of black tea based on SVM model
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Table 4. Classification results of five kinds of white tea based on SVM model
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