Xiangyu Ge, Jianli Ding, Jingzhe Wang, Fei Wang, Lianghong Cai, Huilan Sun. Estimation of Soil Moisture Content Based on Competitive Adaptive Reweighted Sampling Algorithm Coupled with Machine Learning[J]. Acta Optica Sinica, 2018, 38(10): 1030001
- Acta Optica Sinica
- Vol. 38, Issue 10, 1030001 (2018)
Fig. 1. Mean-standard deviation distribution of soil-residual prediction for full-sample MCCV
Fig. 2. Flow chart of calculation process for experience and model
Fig. 3. Spectral reflectance of soils with different SMCs
Fig. 4. Variable filtering process using CARS. (a) Variation in wavelength variable number; (b) variation in RMSECV; (c) trend of variable regression coefficient when RMSECV is minimum
Fig. 5. Mean reflectance of soil samples and optimal spectral bands
Fig. 6. Predicted and measured SMCs using ELM model
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Table 1. Statistical characteristics of SMC of soil samples
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Table 2. Estimated SMC
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Table 3. Predicted SMC based on different ratios of calibration to prediction
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