Hui SHENG, Hai-xu CHI, Ming-ming XU, Shan-wei LIU, Jian-hua WAN, Jin-jin WANG. Inland Water Chemical Oxygen Demand Estimation Based on Improved SVR for Hyperspectral Data[J]. Spectroscopy and Spectral Analysis, 2021, 41(11): 3565
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 11, 3565 (2021)
Fig. 1. The maps of Weihe and Xiashan reservoirs
Fig. 2. Optimization SVR model using SA-PSO
Fig. 3. Measured reflectance spectra (a); and normalized spectra (b)
Fig. 4. Pearson’s correlation coefficient (r ) between band ratios R rs(λ 2)/R rs(λ 1) and COD in the spectral range of 466~940 nm
Fig. 5. SA-PSO-SVR accuracy evaluation
Fig. 6. Evaluations of predictions using SVR, BP neural network and LR method
Fig. 7. Spatial distribution of COD concentration obtained from OHS data
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