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Proceedings Paper

Real-Time Phase Detection For Fringe-Pattern Analysis Using Digital Signal Processing
Author(s): Junichi Kato; Toshio Tanaka; Shigeo Ozono; Keiichi Fujita; Masahiko Shizawa; Kiyoshi Takamasu
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Paper Abstract

A real-time phase detection method is proposed for restoring three-dimensional profile from fringe patterns generated by deformed grating method or interferometry. The method uses the digital signal processing technique, DPLL(digital phase-locked loop), for extracting the phase distribution directly from the video signal of fringe image. This method is easy to apply to practical measurements and vision systems which need a fast information processing capability, because the phase distribution can be extracted in video-rate with high accuracy and it is suited to a computer base system. The principles and the experimental results are presented in this paper.

Paper Details

Date Published: 7 June 1989
PDF: 6 pages
Proc. SPIE 1032, 18th Intl Congress on High Speed Photography and Photonics, (7 June 1989); doi: 10.1117/12.969207
Show Author Affiliations
Junichi Kato, The University of Tokyo (Japan)
Toshio Tanaka, The University of Tokyo (Japan)
Shigeo Ozono, The University of Tokyo (Japan)
Keiichi Fujita, IBM Japan Ltd. (Japan)
Masahiko Shizawa, NTT Human Interface Laboratories (Japan)
Kiyoshi Takamasu, Tokyo Denki University (Japan)


Published in SPIE Proceedings Vol. 1032:
18th Intl Congress on High Speed Photography and Photonics
DaHeng Wang, Editor(s)

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