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1 September 2009 Dual deterministic phase unwrapping method for real-time 3D shape measurement
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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.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nobukazu Yoshikawa and Syogo Yamazaki "Dual deterministic phase unwrapping method for real-time 3D shape measurement", Proc. SPIE 7442, Optics and Photonics for Information Processing III, 74420L (1 September 2009); https://doi.org/10.1117/12.825801
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