New Applications for Airborne and Satellite Multispectral Imagery (Abstract)

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Sixth International Conference on Remote Sensing for Marine and Coastal Environments 2000


Ron Abileah, SRI International
Paper Summary

Applications of multispectral imagery over bodies of water included: detecting pollutant effluents, monitoring coral reefs, locating shipwrecks, and tracking marine mammals. Often these subjects are obscured by sun glint and light scattering from the water volume. SRI International developed an algorithm to subtract this background clutter. The method works using multispectral imagery, using spectral differences to distinguish the interesting objects from the clutter. In ocean imagery at least three spectral bands are recommended, and up to ten can be beneficial. The method was first proven and applied to detection of underwater mines. In this paper the authors explore applications to non-defense subjects. Imagery used in this study was acquired with several different airborne multispectral
imaging systems, typically with 0.5 to 1 m ground resolution. In the near future we hope to apply the technique to high resolution (1 m panchromatic, 4 m in multispectral) imagery that will be available from commercial satellites (e.g., Ikonos). Early satellite results will be reported if available in time for the conference.

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