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Proceedings Paper

Novel vegetation index for chlorophyll nondestructive spectral analysis
Author(s): Andrea Maccioni; Giovanni Agati; Piero Mazzinghi
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Paper Abstract

Directional reflectance spectra from 400 to 780 nm were acquired at an angle-of-view of 30° for nadir illuminated leaves of four different kinds of plants (Codiaeum variegatum, Eleagnus angustifolia, Pittosporum tobira, Ficus benjamini). We found that, differently from hemispherical reflectance measurements, directional reflectance data do not correlate well with chlorophyll content. This is mainly due to the Fresnel reflections at the air-epidermis and epidermis-inner layer interfaces that gives the main contribute to the reflectance in 400-480 nm band, where chlorophyll absorption is maximum. The inner reflectance (RI), obtained by subtracting the outer reflectance from the measured spectra, was found to correlate to chlorophyll content. A good correlation (r2 = 0.98) of RI(?)/RI750 versus the log(Chl) was obtained for RI(?) in the reflectance maximum in the green band around 550 nm. The error in the determination of Chi content was of about 3.5 |µ/cm2, lower than that obtained by applying previously suggested vegetation indexes to our experimental data.

Paper Details

Date Published: 23 January 2001
PDF: 10 pages
Proc. SPIE 4171, Remote Sensing for Agriculture, Ecosystems, and Hydrology II, (23 January 2001); doi: 10.1117/12.413951
Show Author Affiliations
Andrea Maccioni, Istituto di Eletrronica Quantistica (Italy)
Giovanni Agati, Istituto di Eletrronica Quantistica (Italy)
Piero Mazzinghi, Istituto Nazionale di Ottica Applicata (Italy)


Published in SPIE Proceedings Vol. 4171:
Remote Sensing for Agriculture, Ecosystems, and Hydrology II
Manfred Owe; Guido D'Urso; Eugenio Zilioli, Editor(s)

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