Spectroscopy and Spectral Analysis, Volume. 41, Issue 1, 250(2021)

Estimation of Grassland Aboveground Biomass From UAV-Mounted Hyperspectral Image by Optimized Spectral Reconstruction

Xiao-yan KANG1,1、*, Ai-wu ZHANG1,1, and Hai-yang PANG1,1
Author Affiliations
  • 1[in Chinese]
  • 11. Key Laboratory of 3D Information Acquisition and Application, Ministry of Education, Capital Normal University, Beijing 100048, China
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    Figures & Tables(8)
    Study area
    The sketch map of the spectral cube parametrization and the preliminary reconstruction
    Comparison between the raw spectrum (a) and the preliminarily reconstructed spectra (order 1~7 (b—h)) for a spectrum
    Fidelity comparison between PRS and OPRSred planes: PRS; curved surfaces: OPRS
    Spectral comparison (d=3, r=25)
    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
    PLSR models evaluation of grassland AGB prediction(a): Raw spectra; (b—e): Order 1~4 PRS; (f—i): Order 1~4 OPRS
    • Table 1. Performance evaluation of grassland AGB (g·m-2) prediction by different spectral processing

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      Table 1. Performance evaluation of grassland AGB (g·m-2) prediction by different spectral processing

      SpectraRp2pRMSERPDReference
      Raw0.7600.00027.772.05Fig.7(a)
      Order-1 PRS0.4730.00042.521.34Fig.7(b)
      Order-2 PRS0.5570.00037.361.52Fig.7(c)
      Order-3 PRS0.6820.00031.571.80Fig.7(d)
      Order-4 PRS0.7720.00026.772.13Fig.7(e)
      Order-1 OPRS0.1400.042101.130.56Fig.7(f)
      Order-2 OPRS0.7550.00029.191.95Fig.7(g)
      Order-3 OPRS0.8000.00025.512.23Fig.7(h)
      Order-4 OPRS0.8200.00024.682.31Fig.7(i)
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    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

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    Paper Information

    Category: Research Articles

    Received: Jul. 13, 2019

    Accepted: --

    Published Online: Apr. 8, 2021

    The Author Email: Xiao-yan KANG (xy.maup.kang@gmail.com)

    DOI:10.3964/j.issn.1000-0593(2021)01-0250-07

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