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Analysis of imaging spectrometer data to evaluate the biochemical content of vegetation, based on the results of a laboratory experiment
Author(s): Jean Verdebout; Stephane Jacquemoud; Giovanni Andreoli; Brian Hosgood; Alfredo Pedrini; Guido Schmuck
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Paper Abstract

The reflectance spectrum of green vegetation is mainly determined by the leaf content in chlorophyll and water, the respective spectral signatures being modulated by the structural characteristics of the leaf and the canopy. However, correlation between the reflectance spectra and the leaf content in such constituents as lignin, cellulose, nitrogen, starch, etc. has been demonstrated. To further study this question, we have constituted a data set associating high quality spectra (of single leaves, optically thick stacks, needles, stalks, on fresh and dried material) with a number of physical and chemical measurements (leaf thickness, water content, chlorophyll, carotenoids, cellulose, lignin, proteins, nitrogen, starch). This data set has been used to investigate the link between the optical properties and the composition, focusing on the biochemical components. Two approaches have been followed: the classical regression analysis and modeling based on the Kubelka-Munk formula. In the latter case, empirical specific absorption coefficients have been determined and then used to decompose the infrared spectra in water and other components contributions. This method is successful in retrieving the relative water content but does not yet allow us to estimate the biochemical content. It was applied both on laboratory and AVIRIS spectra.

Paper Details

Date Published: 31 January 1995
PDF: 14 pages
Proc. SPIE 2314, Multispectral and Microwave Sensing of Forestry, Hydrology, and Natural Resources, (31 January 1995); doi: 10.1117/12.200746
Show Author Affiliations
Jean Verdebout, Joint Research Ctr. (Italy)
Stephane Jacquemoud, Joint Research Ctr. (Italy)
Giovanni Andreoli, Joint Research Ctr. (Italy)
Brian Hosgood, Joint Research Ctr. (Italy)
Alfredo Pedrini, Joint Research Ctr. (Italy)
Guido Schmuck, Joint Research Ctr. (Italy)

Published in SPIE Proceedings Vol. 2314:
Multispectral and Microwave Sensing of Forestry, Hydrology, and Natural Resources
Eric Mougin; K. Jon Ranson; James Alan Smith, Editor(s)

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