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Proceedings Paper

Retrieval of sand density from hyperspectral BRDF
Author(s): Charles M. Bachmann; Andrei Abelev; William Philpot; Katarina Z. Doctor; Marcos J. Montes; Robert Fusina; Rong-Rong Li; Elena van Roggen
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Paper Abstract

In past work, we have shown that density effects in hyperspectral bi-directional reflectance function (BRDF) data are consistent in laboratory goniometer data, field goniometer measurements with the NRL Goniometer for Portable Hyperspectral Earth Reflectance (GOPHER), and airborne CASI-1500 hyperspectral imagery. Density effects in granular materials have been described in radiative transfer models and are known, for example, to influence both the overall level of reflectance as well as the size of specific characteristics such as the width of the opposition effect in the BRDF. However, in mineralogically complex sands, such as coastal sands, the relative change in reflectance with density depends on the composite nature of the sand. This paper examines the use of laboratory and field hyperspectral goniometer data and their utility for retrieving sand density from airborne hyperspectral imagery. We focus on limitations of current models to describe density effects in BRDF data acquired in the field, laboratory setting, and from airborne systems.

Paper Details

Date Published: 13 June 2014
PDF: 9 pages
Proc. SPIE 9088, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XX, 908807 (13 June 2014); doi: 10.1117/12.2050682
Show Author Affiliations
Charles M. Bachmann, U.S. Naval Research Lab. (United States)
Andrei Abelev, U.S. Naval Research Lab. (United States)
William Philpot, Cornell Univ. (United States)
Katarina Z. Doctor, U.S. Naval Research Lab. (United States)
George Mason Univ. (United States)
Marcos J. Montes, U.S. Naval Research Lab. (United States)
Robert Fusina, U.S. Naval Research Lab. (United States)
Rong-Rong Li, U.S. Naval Research Lab. (United States)
Elena van Roggen, Marine Information Resources Corp. (United States)


Published in SPIE Proceedings Vol. 9088:
Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XX
Miguel Velez-Reyes; Fred A. Kruse, Editor(s)

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