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Experimental comparison of phase-shifting fringe projection and statistical pattern projection for active triangulation systems

: Lutzke, Peter; Schaffer, Martin; Kühmstedt, Peter; Kowarschik, Richard; Notni, Gunther


Lehmann, P.H. (Ed.) ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Optical Measurement Systems for Industrial Inspection VIII : 13.-16.5.2013, Munich, Germany
Bellingham, WA: SPIE, 2013 (Proceedings of SPIE 8788)
ISBN: 978-0-8194-9604-1
Paper 878813
Conference "Optical Measurement Systems for Industrial Inspection" <8, 2013, Munich>
Conference Paper
Fraunhofer IOF ()
optical metrology; three dimensional-measurement; active triangulation; phase shifting; statistical patterns; structured light

Active triangulation systems are widely used for precise and fast measurements. Many different coding strategies have been invented to solve the correspondence problem. The quality of the measurement results depends on the accuracy of the pixel assignments. The most established method uses phase shifted-patterns projected on the scene. This is compared to a method using statistical patterns. In both coding strategies, the number and the spatial frequency of the projected patterns is varied. The measurements and calculations for all presented results were done with exactly the same measurement setup in a narrow time window to avoid any changes and to guarantee identical technical preconditions as well as comparability.