Hyperspectral and directional remote sensing measurements of rice canopies for estimation of plant growth variables
An AOTF (Acousto-Optic Tunable Filter)-based spectral imager for field use was developed for hyper-spectral measurement of plant reflectance. Hyper-spectral imagery in a region between 450nm-900nm was obtained at 3 to 5nm resolution. Spectral wavelengths and interval were both programmable by PC control. Regression trial for rice canopies suggested that the leaf nitrogen and chlorophyll contents would be estimated by high-resolution measurement in visible and near infrared region. The directional multi-spectral measurements in visible, near-, and shortwave- infrared regions were obtained for rice canopies and used for inversion of bi-directional reflectance models. Results suggested that physically based directional model would be used for directional correction and for estimation of eco-physiological variables of rice canopies although they seemed less accurate in red region under sparse condition.
| Main Authors: | , , , |
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| Format: | conference_item biblioteca |
| Language: | eng |
| Published: |
IEEE
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| Subjects: | U30 - Méthodes de recherche, F62 - Physiologie végétale - Croissance et développement, U10 - Informatique, mathématiques et statistiques, Oryza sativa, feuille, Réflectance, modèle de simulation, imagerie, azote, chlorophylle, couvert, http://aims.fao.org/aos/agrovoc/c_5438, http://aims.fao.org/aos/agrovoc/c_4243, http://aims.fao.org/aos/agrovoc/c_28538, http://aims.fao.org/aos/agrovoc/c_24242, http://aims.fao.org/aos/agrovoc/c_36760, http://aims.fao.org/aos/agrovoc/c_5192, http://aims.fao.org/aos/agrovoc/c_1577, http://aims.fao.org/aos/agrovoc/c_1262, |
| Online Access: | http://agritrop.cirad.fr/479737/ |
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