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Generic nonsinusoidal phase error correction for 3D shape measurement using a digital video projector

Song Zhang Shing-Tung Yau

Computational Geometry mathscidoc:1912.43664

6292, 62920R, 2006.8
Structured light system using a digital video projector is increasingly used for a 3-D shape measurement because of its digital nature. However, the nonlinear gamma of the projector causes the projected fringe patterns to be non-sinusoidal, which results in phase error therefore shape measurement error. Previous work showed that, by using a small look-up-table (LUT), this type of phase error can be reduced significantly for a three-step phase-shifting algorithm. In this research, we prove that this type of phase error compensation method is not limited to a three-step phase-shifting algorithm. It is generic for any phase-shifting algorithm. The phase error compensation algorithm is able to theoretically eliminate the phase error caused by the gamma of the projector completely. It is based on our finding that in phase domain, the phase error due to the projector's gamma is preserved for arbitrary object's surface
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@inproceedings{song2006generic,
  title={Generic nonsinusoidal phase error correction for 3D shape measurement using a digital video projector},
  author={Song Zhang, and Shing-Tung Yau},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224204823616799228},
  volume={6292},
  pages={62920R},
  year={2006},
}
Song Zhang, and Shing-Tung Yau. Generic nonsinusoidal phase error correction for 3D shape measurement using a digital video projector. 2006. Vol. 6292. pp.62920R. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224204823616799228.
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