Shaobo WANG, Jiangkun ZHANG, Qingbiao CHENG, Ning SHEN, Jie LIU, Jie FENG. Spectral reflectivity based tea concentration prediction for tea dyeing of rice paper[J]. Optical Instruments, 2023, 45(4): 71
- Optical Instruments
- Vol. 45, Issue 4, 71 (2023)
Fig. 1. Images of two kinds of tea dyed rice papers using distilled water and tap water
Fig. 2. The average spectral reflectance of two kinds of tea dyed rice papers using distilled water and tap water
Fig. 3. Images of tea dyed rice paper of four brands
Fig. 4. Spectral curves of 300 samples of each of the four brands of ricepaper
Fig. 5. Results of PLS model estimation for four brands of rice paper
Fig. 6. Results of BP neural network model for four brands of rice paper
Fig. 7. The characteristic spectral wavelengths of four brands of rice paper were screened by SPA
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Table 1. Chromatism of two kinds of tea dyed rice papers using distilled water and tap water
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Table 2. PLS model results of four brands of rice paper
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Table 3. BP neural network model results of four brands of rice paper
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Table 4. Results of SPA-PLS and SPA-BP neural network estimation models for four brands of rice paper
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