Xiao-yan KANG, Ai-wu ZHANG, Hai-yang PANG. Estimation of Grassland Aboveground Biomass From UAV-Mounted Hyperspectral Image by Optimized Spectral Reconstruction[J]. Spectroscopy and Spectral Analysis, 2021, 41(1): 250
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 1, 250 (2021)
Fig. 1. Study area
Fig. 2. The sketch map of the spectral cube parametrization and the preliminary reconstruction
Fig. 3. Comparison between the raw spectrum (a) and the preliminarily reconstructed spectra (order 1~7 (b—h)) for a spectrum
Fig. 4. Fidelity comparison between PRS and OPRS
red planes: PRS; curved surfaces: OPRS
red planes: PRS; curved surfaces: OPRS
Fig. 5. Spectral comparison (d= 3, r= 25)
Fig. 6. Absolute correlation coefficients [ABS(CC)] between grassland AGB and spectral variables
(a): Raw spectra; (b—e): Order 1~4 PRS; (f—i): Order 1~4 OPRS
(a): Raw spectra; (b—e): Order 1~4 PRS; (f—i): Order 1~4 OPRS
Fig. 7. PLSR models evaluation of grassland AGB prediction
(a): Raw spectra; (b—e): Order 1~4 PRS; (f—i): Order 1~4 OPRS
(a): Raw spectra; (b—e): Order 1~4 PRS; (f—i): Order 1~4 OPRS
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Table 1. Performance evaluation of grassland AGB (g·m-2) prediction by different spectral processing
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