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• NISCHAN, JOSEPH, LIBBY, AND KEREKES Active Spectral Imaging Active Spectral Imaging

By Melissa L. Nischan, Rose M. Joseph, Justin C. Libby and John P. Kerekes


■ With the ability to image a scene in tens to hundreds of spectral bands, multispectral and hyperspectral imaging sensors have become powerful tools for remote sensing. However, spectral imaging systems that operate at visible through near-infrared wavelengths typically rely on solar illumination. This reliance gives rise to a number of limitations, particularly with regard to military applications. Actively illuminating the scene of interest offers a way to address these limitations while providing additional advantages. We have been exploring the benefits of using active illumination with spectral imaging systems for a variety of applications. Our laboratory setup includes multispectral and hyperspectral sensors that are used in conjunction with several laser illumination sources, including a broadband white-light laser. We have applied active spectral imaging to the detection of various types of military targets, such as inert land mines and camouflage paints and fabrics, using a combination of spectral reflectance, fluorescence, and polarization measurements. The sensor systems have been operated under a variety of conditions, both in the laboratory an

Year: 2010
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