Experimental comparison of laser speckle projection and array projection for high-speed 3D measurements

Stefan Heist; Peter Lutzke; Patrick Dietrich; Peter Kühmstedt; Gunther Notni

doi:10.1117/12.2184672

22 June 2015 Experimental comparison of laser speckle projection and array projection for high-speed 3D measurements

Stefan Heist, Peter Lutzke, Patrick Dietrich, Peter Kühmstedt, Gunther Notni

Proceedings Volume 9525, Optical Measurement Systems for Industrial Inspection IX; 952515 (2015) https://doi.org/10.1117/12.2184672
Event: SPIE Optical Metrology, 2015, Munich, Germany

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.

Citation Download Citation

Stefan Heist, Peter Lutzke, Patrick Dietrich, Peter Kühmstedt, and Gunther Notni "Experimental comparison of laser speckle projection and array projection for high-speed 3D measurements", Proc. SPIE 9525, Optical Measurement Systems for Industrial Inspection IX, 952515 (22 June 2015); https://doi.org/10.1117/12.2184672

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