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Proceedings Paper

A prototype system for high precision 3D measurement based on grating method
Author(s): Zhongwei Li; Congjun Wang
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Paper Abstract

In this paper a 3D shape measurement system based on the grating method was developed. The system consists of two CCD cameras and a DLP projector. The multi-frequency heterodyne principle was presented to overcome the unwrapping problem of phase functions, and a phase-to-coordinates conversion algorithm was proposed to reconstruct the 3D geometry from the unwrapped phase map. To demonstrate the performance of this 3D measurement system, a face model was measured, and the reconstructed 3D geometric surface is very smooth with details. Additionally, a ladder with one step was measured. The result shows the system can measure the discontinuous object and get high measurement precision.

Paper Details

Date Published: 28 November 2007
PDF: 10 pages
Proc. SPIE 6834, Optical Design and Testing III, 683442 (28 November 2007); doi: 10.1117/12.762005
Show Author Affiliations
Zhongwei Li, Huazhong Univ. of Science and Technology (China)
Congjun Wang, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 6834:
Optical Design and Testing III
Yongtian Wang; Theo T. Tschudi; Jannick P. Rolland; Kimio Tatsuno, Editor(s)

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