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Proceedings Paper

Optical in situ LAI determination in forest stands: sensors, methods and future challenges
Author(s): Inge Jonckheere; Bart Muys; Pol Coppin
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Paper Abstract

Rapid, reliable and objective estimations of leaf area index (LAI), defined as one half the total intercepting area per unit ground surface area, are essential for numerous studies of atmosphere-vegetation interaction, as LAI is very often a critical parameter in process-based models of canopy response to global environmental change. The usefulness of indirect optical LAI measurements by means of hemispherical canopy photography has already been demonstrated in that context. LAI is then calculated by gap fraction inversion. As a standardized protocol is needed for digital hemispherical canopy photography, virtual 3-D canopy stand models can be used to develop, validate and optimize data processing from these photographs.

Paper Details

Date Published: 19 October 2005
PDF: 11 pages
Proc. SPIE 5976, Remote Sensing for Agriculture, Ecosystems, and Hydrology VII, 597613 (19 October 2005); doi: 10.1117/12.627648
Show Author Affiliations
Inge Jonckheere, Katholieke Univ. Leuven (Belgium)
Bart Muys, Katholieke Univ. Leuven (Belgium)
Pol Coppin, Katholieke Univ. Leuven (Belgium)


Published in SPIE Proceedings Vol. 5976:
Remote Sensing for Agriculture, Ecosystems, and Hydrology VII
Manfred Owe; Guido D'Urso, Editor(s)

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