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Reduction of background clutter in structured lighting systems

United States Patent

June 22, 2010
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
Method for Reducing Background Clutter in a Camera Image
Methods for segmenting the reflected light of an illumination source having a characteristic wavelength from background illumination (i.e. clutter) in structured lighting systems can comprise pulsing the light source used to illuminate a scene, pulsing the light source synchronously with the opening of a shutter in an imaging device, estimating the contribution of background clutter by interpolation of images of the scene collected at multiple spectral bands not including the characteristic wavelength and subtracting the estimated background contribution from an image of the scene comprising the wavelength of the light source and, placing a polarizing filter between the imaging device and the scene, where the illumination source can be polarized in the same orientation as the polarizing filter. Apparatus for segmenting the light of an illumination source from background illumination can comprise an illuminator, an image receiver for receiving images of multiple spectral bands, a processor for calculations and interpolations, and a polarizing filter.
Carlson; Jeffrey J. (Albuquerque, NM), Giles; Michael K. (Las Cruces, NM), Padilla; Denise D. (Albuquerque, NM), Davidson, Jr.; Patrick A. (Albuquerque, NM), Novick; David K. (Albuquerque, NM), Wilson; Christopher W. (Albuquerque, NM)
Sandia Corporation (Albuquerque, NM)
11/ 580,572
October 13, 2006
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The United States Government has certain rights in this invention pursuant to Department of Energy Contract No. DE-AC04-94AL85000 with Sandia Corporation.