Darvishzadeh, R.

Groen, T.A.

Hecker, C.A.

Neinavaz, E.

Skidmore, A.K.

English

University of Twente Research Information

Estimation of Leaf Area Index from Hyperspectral Thermal Data   EARSeL, Luxembourg, 14-16 April 2015   Elnaz Neinavaz Roshanak Darvishzadeh Andrew Skidmore Thomas Groen Christoph Hecker Department of Natural Resources  Context of this research: 0,4 0,6 0,8 1,0 1,4 2,0 3,0 6,0 VIS NIR LWIR SWIR MWIR 8,0… To evaluate the effects of variation of LAI on emissivity of plants.  Euonymus japonicus  Ficus benjamina Buxus sempervirens Azalea japonica Experiment: Variation in leaf area index:   MIDAC (M4401-F) • Wavelength from 2.5 to 20 (μm) • Spectral resolution of 32 to 0.5 (cm-1).  FTIR Spectrometer: Radiance spectra of the gold diffuse plate Radiance spectra of the sample surface  Radiance spectra of hot and cold blackbodies Emissivity spectra Data processing  Radiometric calibration  Emissivity derivation Pre-preprocessing of spectra Methodology: Azalea japonica Euonymus japonicus Primary results:  Correlation between emissivity and leaf area index Buxus sempervirens Ficus benjamina Buxus sempervirens Max Max Max Max Results: Influence of same amount of LAI on emissivity in different species  LAI 2.5 (m2m-2)  LAI 2.5 (m2m-2)  Effects of variation of LAI on emissivity spectra  The emissivity spectra changes with LAI variation;  Emissivity spectra demonstrates differences between species with similar LAI from 8-14 µm of the spectrum;  Hyperspectral data at the TIR region has the potential for retrieval of vegetation biophysical variables.  Conclusions: Thank you for your attention!   E., Neinavaz, R., Darvishzadeh, A.K., Skidmore,  T., Groen and C., Hecker.  

Estimation of Leaf Area Index from Hyperspectral Thermal Data

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Estimation of Leaf Area Index from Hyperspectral Thermal Data : powerpoint

Estimation of Leaf Area Index from Hyperspectral Thermal Data : powerpoint

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