Yu-ru KONG, Li-juan WANG, Hai-kuan FENG, Yi XU, Liang LIANG, Lu XU, Xiao-dong YANG, Qing-qi ZHANG. Leaf Area Index Estimation Based on UAV Hyperspectral Band Selection[J]. Spectroscopy and Spectral Analysis, 2022, 42(3): 933
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 3, 933 (2022)
Fig. 1. Location of the study area and experimental design of winter wheat
Fig. 2. The curve of root mean square error(n =32)
Fig. 3. The determination coefficient and root mean square error of vegetation indexes and LAI (n =32)
(a):R 2 for LAI and NDSI; (b): RMSE for LAI and NDSI; (c): R 2 for LAI and RSI; (d): RMSE for LAI and RSI; (e): R 2 for LAI and SSI; (f): RMSE for LAI and SSI
(a):
Fig. 4. Results of LAI models with different band combinations (n =16)
(a): VI_OIF_SVR; (b): VI_OIF_PLSR; (c): VI_OIF_RFR; (d): VI_SPA_SVR; (e): VI_SPA_PLSR; (f): VI_SPA_RFR; (g): VI_E_SVR; (h): VI_E_PLSR; (i): VI_E_RFR; (j): VI_F_SVR; (k): VI_F_PLSR; (l): VI_F_RFR
(a): VI_OIF_SVR; (b): VI_OIF_PLSR; (c): VI_OIF_RFR; (d): VI_SPA_SVR; (e): VI_SPA_PLSR; (f): VI_SPA_RFR; (g): VI_E_SVR; (h): VI_E_PLSR; (i): VI_E_RFR; (j): VI_F_SVR; (k): VI_F_PLSR; (l): VI_F_RFR
Fig. 5. Spatial distribution map of LAI in winter wheat
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Table 1. Vegetation indexes and formulas
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Table 2. Optimal indexes of band combination (n =32)
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Table 3. Correlation between cotton LAI values and vegetation indexes (n =32)
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