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Optical Engineering

Calibration and exploitation of a narrowband imaging polarimeter
Author(s): Michael J. Duggin; Richard S. Loe
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Paper Abstract

The integration and calibration of a narrow-band imaging po- larimeter is described. The system is designed to exploit subtle spectral details in visible and near-IR polarimetric images. All of the system components were commercial off the shelf. This device uses a tunable liquid crystal filter and a 16-bit cooled CCD camera. The challenges of calibrating a narrow-band imaging polarimeter are discussed. We describe examples of image data collected in the laboratory, which show that spectral polarimetric data is superior to unpolarized intensity data in facilitating the extraction of detail in shadowed regions below a vegetative canopy. In particular, we introduce a polarization-based normalized difference vegetation index (NDVI) algorithm that demonstrates significant contrast enhancement between a man-made object and a foilage background.

Paper Details

Date Published: 1 May 2002
PDF: 9 pages
Opt. Eng. 41(5) doi: 10.1117/1.1467935
Published in: Optical Engineering Volume 41, Issue 5
Show Author Affiliations
Michael J. Duggin, SUNY/Syracuse and PAR Government Systems Corp. (United States)
Richard S. Loe, PAR Government Systems Corp. (United States)

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