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Proceedings Paper

Matrix determination of hidden object reflectance by indirect photography
Author(s): Simon S. Ferrel; Michael A. Marciniak
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Paper Abstract

Indirect photography was recently demonstrated as a technique for imaging hidden objects. A camera and laser are collocated, neither with line-of-sight to the object. Laser light is reflected off a visible surface onto the hidden object, then reflected back to the visible surface and collected by the camera. Varying laser spot position yields different camera images, which are used to construct an "indirect" image of the object. Here, camera images are processed by modeling the system as a set of radiometric transport and reflectance matrices. Matrix formulation and inversion, and those parameters demonstrated to improve indirect image quality, are discussed.

Paper Details

Date Published: 15 October 2012
PDF: 14 pages
Proc. SPIE 8495, Reflection, Scattering, and Diffraction from Surfaces III, 84950Q (15 October 2012); doi: 10.1117/12.929095
Show Author Affiliations
Simon S. Ferrel, Air Force Institute of Technology (United States)
Michael A. Marciniak, Air Force Institute of Technology (United States)

Published in SPIE Proceedings Vol. 8495:
Reflection, Scattering, and Diffraction from Surfaces III
Leonard M. Hanssen, Editor(s)

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