Yue YU, Hai-ye YU, Xiao-kai LI, Hong-jian WANG, Shuang LIU, Lei ZHANG, Yuan-yuan SUI. Hyperspectral Inversion Model for SPAD of Rice Leaves Based on Optimized Spectral Index[J]. Spectroscopy and Spectral Analysis, 2022, 42(4): 1092
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 4, 1092 (2022)
Fig. 1. Diagram of NAOC spectral index
Fig. 2. Reconstructed reflectance spectra of L1-L6 layers by wavelet analysis
Fig. 3. Isopotential diagram of correlation coefficient between optimized and transformed spectral indices and SPAD of rice leaves
Fig. 4. Scatter plots of prediction results
(a): PLSR; (b): SVM; (c): BP
(a): PLSR; (b): SVM; (c): BP
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Table 1. Eight common dual wavelength spectral indices and their linear correlation coefficients with SPAD of rice leaves
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Table 2. Inversion results of three modeling methods
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