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Proceedings Paper

Correlation analysis of hyperspectral absorption features with the water status of coast live oak leaves
Author(s): Ruiliang Pu; Shaokui Ge; Nina Maggi Kelly; Peng Gong
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Paper Abstract

A total of 139 reflectance spectra (between 350 and 2500 nm) from coast live oak (Quercus Agrifolia) leaves were measured in the laboratory with a spectrometer FieldSpec«Pro FR. Correlation analysis was conducted between absorption features, three-band ratio indices derived from the spectra and corresponding relative water content (RWC, %) of oak leaves. The experimental results indicate that there exist linear relationships between the RWC of oak leaves and absorption feature parameters: wavelength position (WAVE), absorption feature depth (DEP), width (WID) and the multiplication of DEP and WID (AREA) at the 975 nm, 1200 nm and 1750 nm positions and two three-band ratio indices: RATIO975 and RATIO1200, derived at 975 nm and 1200 nm. AREA has a higher and more stable correlation with RWC compared to other features. It is worthy of noting that the two three-band ratio indices, RATIO975 and RATIO1200, may have potential application in assessing water status in vegetation.

Paper Details

Date Published: 17 January 2002
PDF: 7 pages
Proc. SPIE 4480, Imaging Spectrometry VII, (17 January 2002); doi: 10.1117/12.453334
Show Author Affiliations
Ruiliang Pu, Univ. of California/Berkeley (United States)
Shaokui Ge, Univ. of California/Berkeley (United States)
Nina Maggi Kelly, Univ. of California/Berkeley (United States)
Peng Gong, Univ. of California/Berkeley (United States)

Published in SPIE Proceedings Vol. 4480:
Imaging Spectrometry VII
Michael R. Descour; Sylvia S. Shen, Editor(s)

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