Robust stereo phase unwrapping based on a quad-camera system

Tianyang Tao; Shijie Feng; Yan Hu; Chao Zuo; Qian Chen

doi:10.1117/12.2500187

24 July 2018 Robust stereo phase unwrapping based on a quad-camera system

Tianyang Tao, Shijie Feng, Yan Hu, Chao Zuo, Qian Chen

Proceedings Volume 10827, Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018); 108271R (2018) https://doi.org/10.1117/12.2500187
Event: Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018), 2018, Shanghai, China

Abstract

In this work, we demonstrate that by using a quad-camera multi-view fringe projection system and carefully arranging the relative spatial positions between the cameras and the projector, it becomes possible to completely eliminate the phase ambiguities in conventional three-step PSP patterns with high-fringe-density without projecting any additional patterns or embedding any auxiliary signals. Benefit from the position-optimized quadcamera system, stereo phase unwrapping can be efficiently and reliably performed by flexible phase consistency checks. Besides, redundant information of multiple phase consistency checks is fully used through a weighted phase difference scheme to further enhance the reliability of phase unwrapping. This paper explains the 3D measurement principle and the basic design of quad-camera system, and finally demonstrates that the resultant dynamic 3D sensing system can realize real-time 3D reconstruction with a depth precision of 50 μm.

Citation Download Citation

Tianyang Tao, Shijie Feng, Yan Hu, Chao Zuo, and Qian Chen "Robust stereo phase unwrapping based on a quad-camera system", Proc. SPIE 10827, Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018), 108271R (24 July 2018); https://doi.org/10.1117/12.2500187

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KEYWORDS

Cameras

Projection systems

Imaging systems

3D metrology

Optical spheres

3D modeling

3D image reconstruction

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