Dual-frequency pattern scheme for high-speed 3-D shape measurement.

@article{Liu2010DualfrequencyPS,
  title={Dual-frequency pattern scheme for high-speed 3-D shape measurement.},
  author={Kai Liu and Yongchang Wang and Daniel L. Lau and Qi Hao and Laurence G. Hassebrook},
  journal={Optics express},
  year={2010},
  volume={18 5},
  pages={5229-44}
}
A novel dual-frequency pattern is developed which combines a high-frequency sinusoid component with a unit-frequency sinusoid component, where the high-frequency component is used to generate robust phase information, and the unit-frequency component is used to reduce phase unwrapping ambiguities. With our proposed pattern scheme, phase unwrapping can overcome the major shortcomings of conventional spatial phase unwrapping: phase jumping and discontinuities. Compared with conventional temporal… CONTINUE READING
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