Lei Tao, Guangyuan Cai, Zhandong Cheng, Lin Huang, Xiuwen He, Jiang Xu, Mingyin Yao. Using Laser Induced Breakdown Spectroscopy and Machine Learning to Identify Jiangxi Spring Tea Harvesting Periods[J]. Laser & Optoelectronics Progress, 2024, 61(9): 0930004
- Laser & Optoelectronics Progress
- Vol. 61, Issue 9, 0930004 (2024)
Fig. 1. Single experimental sample. (a) Tea leaves; (b) tea infusion enrichment
Fig. 2. Schematic diagram of LIBS main installation
Fig. 3. LIBS average spectrogram of tea leaves. (a) The original spectrum of Mt. Lushan fog tea leaves; (b) the original spectrum of Dog bull head tea leaves
Fig. 4. LIBS average spectrogram of tea infusion. (a) The original spectrum of Mt. Lushan fog tea infusion; (b) the original spectrum of Dog bull head tea infusion
Fig. 5. Baseline corrected average spectrogram of Mt. Lushan fog tea leaves
Fig. 6. PCA three-dimensional scatter plot of Mt. Lushan fog tea.(a) Tea leaves; (b) tea infusion; (c) fusion data
Fig. 7. PCA three-dimensional scatter plot of Dog bull head tea (a) Tea leaves; (b) tea infusion; (c) fusion data
Fig. 8. Comparison chart of the average recognition rate of one thousand times. (a) Mt. Lushan fog Spring tea; (b) Dog bull head Spring tea
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Table 1. Information of spring tea samples
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Table 2. Preferred 11 spectrum peaks
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Table 3. Comparison of classification model results for the cross-validation sets and test sets of Mt. Lushan fog tea
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Table 4. Comparison of classification model results for the cross-validation sets and test sets of Dog bull head tea
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