Xin YANG, Zi-ran YUAN, Yin YE, Dao-zhong WANG, Ke-ke HUA, Zhi-bin GUO. Winter Wheat Total Nitrogen Content Estimation Based on UAV Hyperspectral Remote Sensing[J]. Spectroscopy and Spectral Analysis, 2022, 42(10): 3269
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 10, 3269 (2022)
Fig. 1. Distribution of experimental plots the study site
Fig. 2. Technical flow chart for the winter wheat total nitrogen content (TNC) prediction based on XGBoost
Fig. 3. Canopy spectra of winter wheat at different fields
Fig. 4. Correlation coefficient of spectral reflectance and TNC
Fig. 5. Scatter plots between the predicted TNC and measured TNC
Fig. 6. Spatial distributions of TNC predicted by XGBoost
Fig. 7. Correlaion between TNC in winter wheat and TNC in soil
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Table 1. The meaning and optimal values of some hyper-parameters of the XGBoost model
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