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Proceedings Paper

Use of SHOALS bottom reflectance images to constrain the inversion of a hyperspectral radiative transfer model
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Paper Abstract

When using airborne passive spectral data for underwater imaging, inversion of radiative transfer models is often based on the simplifying assumptions that spectral diffuse attenuation and path radiance do not vary horizontally across the project area. We have developed a technique which does not require these assumptions. In it, we use a combination of SHOALS pseudoreflectance images and passive spectral images to manually identify areas of homogeneous bottom type. At these locations, we use the measured depths from the SHOALS bathymeter to estimate the spectral diffuse attenuation coefficients, the additive path radiance of the water column, and the bottom radiance (or reflectance) at each homogeneous patch. The parameters estimated at these patches are then used as control points in the interpolation of surfaces for each parameter. In this paper, we show early results using this approach to solve the radiative transfer equations for calibrated radiance data acquired with a casi-2 imaging spectrometer, and describe our procedure for producing SHOALS pseudoreflectance images.

Paper Details

Date Published: 13 September 2004
PDF: 9 pages
Proc. SPIE 5412, Laser Radar Technology and Applications IX, (13 September 2004); doi: 10.1117/12.564929
Show Author Affiliations
Grady H. Tuell, Optech International (United States)
Joong Yong Park, Optech International (United States)

Published in SPIE Proceedings Vol. 5412:
Laser Radar Technology and Applications IX
Gary W. Kamerman; Gary W. Kamerman, Editor(s)

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