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Proceedings Paper

Experimental comparison of laser speckle projection and array projection for high-speed 3D measurements
Author(s): Stefan Heist; Peter Lutzke; Patrick Dietrich; Peter Kühmstedt; Gunther Notni
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Paper Abstract

In many application areas, stereo vision-based active triangulation systems are used to reconstruct the three-dimensional (3-D) surface shape of measurement objects. Typically, in order to solve the correspondence problem and increase the accuracy of the pixel assignment, a sequence of patterns is projected onto the object's surface and simultaneously recorded by two cameras. Most 3-D measurement systems are limited to static objects. In order to enhance their speed, it is necessary to use fast cameras as well as fast projection systems. Although high-speed camera systems are available, pattern projection at high frame rates is a difficult task and only a few techniques exist at the moment. In this contribution, we compare two different projection approaches, a laser-based speckle projection unit and an LED-based multi-aperture projection system, with regard to the achievable point cloud completeness and accuracy.

Paper Details

Date Published: 22 June 2015
PDF: 8 pages
Proc. SPIE 9525, Optical Measurement Systems for Industrial Inspection IX, 952515 (22 June 2015); doi: 10.1117/12.2184672
Show Author Affiliations
Stefan Heist, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Peter Lutzke, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Patrick Dietrich, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Peter Kühmstedt, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Gunther Notni, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Technische Univ. Ilmenau (Germany)


Published in SPIE Proceedings Vol. 9525:
Optical Measurement Systems for Industrial Inspection IX
Peter Lehmann; Wolfgang Osten; Armando Albertazzi Gonçalves, Editor(s)

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