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Proceedings Paper

Dual deterministic phase unwrapping method for real-time 3D shape measurement
Author(s): Nobukazu Yoshikawa; Syogo Yamazaki
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Paper Abstract

We propose a phase unwrapping method for processing two phase distributions simultaneously based on a deterministic phase unwrapping method using a composite complex function in which the real and imaginary parts are assigned by two separate phase distributions. Hardly any crosstalk between the real and imaginary parts was observed in the actual numerical computation. We developed a Fourier transform-based 3D measurement method that primarily consists of a fast Fourier transform (FFT) algorithm. Since the proposed method is employed in the frequency domain, the 3D retrieval process can be performed effectively even if the deformed grating pattern uses a high-resolution image format. To accelerate the FFT computation, we implemented the proposed method using a graphics processing unit. The experimental results showed that 3D measurement could be performed in real time using a deformed grating pattern of 1024×1024 pixels.

Paper Details

Date Published: 1 September 2009
PDF: 8 pages
Proc. SPIE 7442, Optics and Photonics for Information Processing III, 74420L (1 September 2009); doi: 10.1117/12.825801
Show Author Affiliations
Nobukazu Yoshikawa, Saitama Univ. (Japan)
Syogo Yamazaki, Saitama Univ. (Japan)

Published in SPIE Proceedings Vol. 7442:
Optics and Photonics for Information Processing III
Khan M. Iftekharuddin; Abdul Ahad Sami Awwal, Editor(s)

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