Infrared and Laser Engineering, Volume. 49, Issue 6, 20200049(2020)
Modified dual-frequency geometric constraint fringe projection for 3D shape measurement
Dual-frequency fringe projection methods have been widely used in three-dimensional (3D) shape measurement, but the phase unwrapping is very sensitive to random noises. A modified dual-frequency geometric constraint fringe was presented. The robustness of phase unwrapping can be effectively enhanced by improving the frequency of low-frequency phase. During the 3D shape measurement, firstly, the five-step phase-shifting algorithm was used to extract two wrapped phases. Secondly, the low-frequency phase was unwrapped based on the geometric constraint method. Finally, the dual-frequency algorithm was used to unwrap the high-frequency phase, and then the 3D shape could be reconstructed. Both simulations and experiments demonstrate that the modified dual-frequency fringe is more robust and applicable than the traditional one.
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Yuwei Wang, Xiangcheng Chen, Yajun Wang. Modified dual-frequency geometric constraint fringe projection for 3D shape measurement[J]. Infrared and Laser Engineering, 2020, 49(6): 20200049
Category: Special issue-Optical 3D imaging and sensing
Received: Mar. 14, 2020
Accepted: --
Published Online: Aug. 19, 2020
The Author Email: Wang Yajun (yjwangisu@whu.edu.cn)