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Proceedings Paper

Hyperspectral versus multispectral imaging for submerged coral detection
Author(s): Heather Holden; Ellsworth LeDrew
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Paper Abstract

Analysis of hyperspectral data has produced encouraging results in the discrimination of common and optically similar coral reef substrates such as healthy corals, bleached corals, sea grass, and algae-covered surfaces, but at the present time, such high spectral resolution data is unavailable from a satellite platform. If currently available satellite imagery is to be used to map and monitor changes in coral reef geographic extent and health, a quantitative procedure must be developed to discriminate healthy coral from other optically similar benthic substrates with coarse spectral resolution. The primary goal of this study is to evaluate the feasibility of using coarse spectral resolution data to map the geographic extent and monitor the changes in coral reef ecosystems. While previous studies have based analysis upon reflectance values extracted from images, an attempt is made here to discriminate common coral reef features using in situ spectral reflectance measurements with spectral resolution equivalent to SPOT HRV data. Results of a one-way analysis of variance suggest that the broad categories of in situ reflectance measurements (n equals 596) can be considered separate populations with respect to broadband reflectance characteristics.

Paper Details

Date Published: 5 January 2001
PDF: 8 pages
Proc. SPIE 4154, Hyperspectral Remote Sensing of the Ocean, (5 January 2001); doi: 10.1117/12.411667
Show Author Affiliations
Heather Holden, National Univ. of Singapore (Singapore)
Ellsworth LeDrew, Univ. of Waterloo (Canada)

Published in SPIE Proceedings Vol. 4154:
Hyperspectral Remote Sensing of the Ocean
Robert J. Frouin; Hiroshi Kawamura; Motoaki Kishino, Editor(s)

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