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Fast three-step phase-shifting algorithm
Applied Optics (2006)
  • Song Zhang, Harvard University
  • Peisen S. Huang, State University of New York at Stony Brook
We propose a new three-step phase-shifting algorithm, which is much faster than the traditional three-step algorithm. We achieve the speed advantage by using a simple intensity ratio function to replace the arctangent function in the traditional algorithm. The phase error caused by this new algorithm is compensated for by use of a lookup table. Our experimental results show that both the new algorithm and the traditional algorithm generate similar results, but the new algorithm is 3.4 times faster. By implementing this new algorithm in a high-resolution, real-time three-dimensional shape measurement system, we were able to achieve a measurement speed of 40 frames per second at a resolution of 532×500 pixels, all with an ordinary personal computer.
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This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Citation Information
Song Zhang and Peisen S. Huang. "Fast three-step phase-shifting algorithm" Applied Optics Vol. 45 Iss. 21 (2006)
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