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Title: Measurement errors in polarization-based 3D vision systems
Author: Liang, B, Wallace, AM, Trucco, E
Year: 1997
Book / Journal: THREE-DIMENSIONAL IMAGING AND LASER-BASED SYSTEMS FOR METROLOGY AND INSPECTION II
Pages: 204-214
Volume: 2909
Abstract: Multiple reflections can degrade significantly depth data acquired by laser rangefinders. However, analysis of the polarization state of the reflected light can provide additional clues to distinguish the first and subsequent reflections, Such estimates depend critically on the ratio between absolute differences of intensity measured by a camera with different settings of some polarizing optical components. Errors introduced by weak signals, the nonlinear response of the sensor, noise and quantisation in the video channel can be very significant. When a laser is used as the illumination source, fluctuation of the source intensity can introduce additional errors if comparisons are made between images acquired at different times. We present a discussion of the type and effects of these errors, guidelines on system settings, and an upper-bound analysis of the error on the estimates of the orientation of the completely polarized component of light, a fundamental quantity used in several polarization vision systems for diverse applications.
Keywords: ,
BibTex: @inproceedings{ ISI:A1997BH14S00019,
Author = {Liang, B and Wallace, AM and Trucco, E},
Editor = {{Harding, KG and Svetkoff, DJ}},
Title = {{Measurement errors in polarization-based 3D vision systems}},
Booktitle = {{THREE-DIMENSIONAL IMAGING AND LASER-BASED SYSTEMS FOR METROLOGY AND
   INSPECTION II}},
Series = {{PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE)}},
Year = {{1997}},
Volume = {{2909}},
Pages = {{204-214}},
Note = {{Conference on Three-Dimensional Imaging and Laser-Based Systems for
   Metrology and Inspection II, BOSTON, MA, NOV 20-21, 1996}},
Abstract = {{Multiple reflections can degrade significantly depth data acquired by
   laser rangefinders. However, analysis of the polarization state of the
   reflected light can provide additional clues to distinguish the first
   and subsequent reflections, Such estimates depend critically on the
   ratio between absolute differences of intensity measured by a camera
   with different settings of some polarizing optical components. Errors
   introduced by weak signals, the nonlinear response of the sensor, noise
   and quantisation in the video channel can be very significant. When a
   laser is used as the illumination source, fluctuation of the source
   intensity can introduce additional errors if comparisons are made
   between images acquired at different times. We present a discussion of
   the type and effects of these errors, guidelines on system settings,
   and an upper-bound analysis of the error on the estimates of the
   orientation of the completely polarized component of light, a
   fundamental quantity used in several polarization vision systems for
   diverse applications.}},
ISBN = {{0-8194-2311-4}},
Unique-ID = {{ISI:A1997BH14S00019}},

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