Dual-frequency pattern scheme for high-speed 3-D shape measurement.
By Kai Liu, Yongchang Wang, D. Lau, Q. Hao, L. Hassebrook. Optics Express, 2010
344 citations recorded by the source corpus.
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 phase unwrapped approaches, the proposed pattern scheme can achieve higher quality phase data using a less number of patterns. To process data in real time, we also propose and develop look-up table based fast and accurate algorithms for phase generation and 3-D reconstruction. Those fast algorithms can be applied to our pattern scheme as well as traditional phase measuring profilometry. For a 640 x 480 video stream, we can generate phase data at 1063.8 frames per second and full 3-D coordinate point clouds at 8.3 frames per second. These achievements are 25 and 10 times faster than previously reported studies.
Subfields: Computer Vision and Pattern Recognition, Geology
View Paper: https://www.semanticscholar.org/paper/1917d6b2c3391a57c7c0285d76f2bc1b12400e31
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In Computer Vision and Pattern Recognition
- Chao Zuo
- Qian Chen
- Minliang Zhang
- Lei Huang
- Anand K. Asundi
- Sam Van der Jeught
- Joris J. J. Dirckx
- Song Zhang
In Geology
Citations in the corpus
- Real-time structured light profilometry: a review (2016, methodology): “582 [111] propose a 5-pattern dual-frequency pattern scheme that combines a high-frequency 583 component with a low-frequency component into a single fringe pattern.”
- Temporal phase unwrapping algorithms for fringe projection profilometry: A comparative review (2016, methodology): “To reduce the motion artifacts, the most practical way is to use high-frame-rates hardware and minimizing the number of projected patterns [6,14,44,60].”