Flexible Digital Fringe Projection System for Step-height Measurement

Details Flexible Digital Fringe Projection System for Step-height Measurement Flexible Digital Fringe Projection System for Step-height Measurement

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1236..433z&link_type=abstract

INTERNATIONAL CONFERENCE ON ADVANCED PHASE MEASUREMENT METHODS IN OPTICS AND IMAGING. AIP Conference Proceedings, Volume 1236,

Physics

Optics

1

Pattern Recognition, Image Processing, Phase Measurement, Cameras, Optical Waveguides, Pattern Recognition, Image Forming And Processing, Phase Retrieval, Optical Elements, Devices, And Systems, Wave Propagation, Transmission And Absorption

Scientific paper

To circumvent the problems induced by nonlinear gamma of the commercial video projector, we recently developed a flexible method for 3-D shape measurement that generates sinusoidal fringe patterns for 3-D shape measurement by defocusing binary structured patterns. However, it can only measure ``smooth'' objects. In this paper, we propose a technique to generalize this technique for arbitrary step height measurement. In particular, the binary coding method is combined with this technique for point-by-point phase unwrapping. Experiments have verified the success of the proposed approach.

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