29 January 2007 Configuration of multi mirror systems for single high-speed camera based 3D motion analysis
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Abstract
The use of multi camera systems to determine 3D object coordinates is a common approach in close range photogrammetry. The paper discusses system configurations based on a single camera and mirror systems to generate a virtual multi camera system. The two main advantages of mirror-based multiple-view vision systems can be seen in the lack of synchronisation requirements and the costs of only one camera. The latter applies especially if high speed cameras are required to capture the dynamics of an application. These advantages have to be weighted against the disadvantages of a reduced active image format per view and the restrictions to the imaging geometry. In the paper we present two different systems used for motion analysis applications: A fixed two mirror system is used to analyse pedestrian protection testing in the context of vehicle safety development, and a flexible four mirror system is used to capture 3D velocity fields of particles visualising gas flows in a wind tunnel. A geometric model for multi-mirror stereoscopic systems has been developed, representing the mirror system by multiple virtual cameras in order to warrant compatibility with existing photogrammetric stereo data processing software solutions. The accuracies achieved in practical tests are almost comparable to those obtained with multi camera systems.
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Torsten Putze, Torsten Putze, Karsten Raguse, Karsten Raguse, Hans-Gerd Maas, Hans-Gerd Maas, } "Configuration of multi mirror systems for single high-speed camera based 3D motion analysis", Proc. SPIE 6491, Videometrics IX, 64910L (29 January 2007); doi: 10.1117/12.700109; https://doi.org/10.1117/12.700109
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