Hailong Zhao, Shu Gan, Xiping Yuan, Lin Hu, Shuai Liu, Junjie Wang. Inversion of Soil Iron Oxide Based on Multi-Scale Continuous Wavelet Decomposition[J]. Acta Optica Sinica, 2022, 42(22): 2230002
- Acta Optica Sinica
- Vol. 42, Issue 22, 2230002 (2022)
Fig. 1. Distribution map of soil sampling points
Fig. 2. Original spectral reflectance curves of all soil samples
Fig. 3. Correlation coefficient between spectrum and iron oxide content
Fig. 4. Thermodynamic diagram of wavelet coefficient and coefficient of determination of iron oxide content
Fig. 5. Characteristic wavelengths selected by CC-CARS algorithm
Fig. 6. Scatter plot of measured and predicted values of soil iron oxide content under different models. (a) L4-CC-CARS-SVR; (b) OS-CC-CARS-SVR; (c) FD-CC-CARS-SVR; (d) RL-CC-CARS-SVR
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Table 1. Statistical characteristics of iron oxide content
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Table 2. Correlation analysis of transform spectrum and iron oxide content
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Table 3. Results of soil iron oxide inversion model
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