Real time three-dimensional shape measurement with phase-to-height lookup table

Wenbo Guo; Zhoujie Wu; Qican Zhang; Motoharu Fujigaki

doi:10.1117/12.2541795

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16 October 2019 Real time three-dimensional shape measurement with phase-to-height lookup table

Wenbo Guo, Zhoujie Wu, Qican Zhang, Motoharu Fujigaki

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Proceedings Volume 11205, Seventh International Conference on Optical and Photonic Engineering (icOPEN 2019); 112052F (2019) https://doi.org/10.1117/12.2541795
Event: Seventh International Conference on Optical and Photonic Engineering (icOPEN 2019), 2019, Phuket, Thailand

Abstract

Phase-to-height mapping is indispensable part of three-dimensional (3D) shape measurement system based on phase analysis, which guarantees the accuracy of 3D reconstruction. In this paper, a real time 3D shape reconstruction method based on dual-frequency composite grating projection and phase-height lookup table is proposed. In this method, a reference plane is moved with a known interval along the measurement depth direction to establish a mapping lookup table between the wrapped phase of dual-frequency composite grating and the corresponding spatial height pixel by pixel respectively. The actual experimental results show that the reconstruction accuracy of this method is better than that of the traditional phase-to-height quadratic fitting method. Finally, combining the high performance parallel computation of GPU, the real time 3D shape reconstruction with the speed of 60 fps and the resolution of 1152*800 pixels is realized.

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Wenbo Guo, Zhoujie Wu, Qican Zhang, and Motoharu Fujigaki "Real time three-dimensional shape measurement with phase-to-height lookup table", Proc. SPIE 11205, Seventh International Conference on Optical and Photonic Engineering (icOPEN 2019), 112052F (16 October 2019); https://doi.org/10.1117/12.2541795

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