Open AccessReal-time 3D shape measurement with dual-frequency composite grating and motion-induced error reduction
Author(s) -
Wenbo Guo,
Zhoujie Wu,
Yueyang Li,
Yihang Liu,
Qican Zhang
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.403474
Subject(s) - grating , optics , reduction (mathematics) , computer science , phase (matter) , motion (physics) , observational error , profilometer , computer vision , artificial intelligence , algorithm , physics , mathematics , geometry , statistics , quantum mechanics , surface roughness
Phase-shifting profilometry has been increasingly sought and applied in dynamic three-dimensional (3D) shape measurement. However, the object motion will lead to extra phase shift error and thus measurement error. In this paper, a real-time 3D shape measurement method based on dual-frequency composite phase-shifting grating and motion-induced error reduction is proposed for a complex scene containing dynamic and static objects. The proposed method detects the motion region of a complex scene through the phase relations of the dual-frequency composite grating and reduces the motion-induced error with the combination of the phase calculated by a phase-shifting algorithm and the phase extracted by Fourier fringe analysis. It can correctly reconstruct the 3D shape of a complex dynamic scene and ensure high measurement accuracy of its static object as well. With the aid of the phase-shifting image ordering approach, the dynamic 3D shape of complex scenes can be reconstructed and the motion-induced error can also be suppressed in real time. Experimental results well proved that the proposed method is effective and practical.