Correlation analysis of hyperspectral absorption features with the water status of coast live oak leaves

Ruiliang Pu; Shaokui Ge; Nina Maggi Kelly; Peng Gong

doi:10.1117/12.453334

17 January 2002 Correlation analysis of hyperspectral absorption features with the water status of coast live oak leaves

Ruiliang Pu, Shaokui Ge, Nina Maggi Kelly, Peng Gong

Author Affiliations +

Proceedings Volume 4480, Imaging Spectrometry VII; (2002) https://doi.org/10.1117/12.453334
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

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.

Citation Download Citation

Ruiliang Pu, Shaokui Ge, Nina Maggi Kelly, and Peng Gong "Correlation analysis of hyperspectral absorption features with the water status of coast live oak leaves", Proc. SPIE 4480, Imaging Spectrometry VII, (17 January 2002); https://doi.org/10.1117/12.453334

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