Imperial College London
Alternate

John P. Dear FREng

Faculty of Engineering, Department of Mechanical Engineering

Professor of Mechanical Engineering
 
 
 
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Contact

 

j.dear Website

 
 
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Location

 

520City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Hu:2021:1361-6501/abddf2,
author = {Hu, P and Yang, S and Zheng, F and Yuan, Y and Wang, T and Li, S and liu, H and Dear, J},
doi = {1361-6501/abddf2},
journal = {Measurement Science and Technology},
title = {Accurate and dynamic 3D shape measurement},
url = {http://dx.doi.org/10.1088/1361-6501/abddf2},
volume = {32},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Phase shifting profilometry (PSP) has been widely used in structured-light (SL) system for three-dimensional (3D) shape measurements, but the speed of PSP technique is limited by the increased phase-shifting patterns. This paper proposes an accurate and dynamic 3D shape measurement method by projecting only four patterns including three-step phase-shifting patterns and one speckle pattern. Three-step phase-shifting images are used to obtain the initial unwrapped phase map with phase ambiguity. Based on the principle of digital image correlation (DIC) and multi-view geometry, the absolute phase can be recovered reliably without requiring any embedded features or pre-defined information of the object. To improve the measurement accuracy, the projector coordinate is used as the measuring coordinate to establish a novel stereo structured-light system model. By solving a least square solution using the triple-view information, accurate 3D surface data can be reconstructed. The experimental results indicate that the proposed method can perform high-speed and accurate 3D shape measurements with an accuracy of 10.64 μm, which is superior to conventional methods and has certain instructive significance for 3D profilometry and measurement engineering.
AU  - Hu,P
AU  - Yang,S
AU  - Zheng,F
AU  - Yuan,Y
AU  - Wang,T
AU  - Li,S
AU  - liu,H
AU  - Dear,J
DO  - 1361-6501/abddf2
PY  - 2021///
SN  - 0957-0233
TI  - Accurate and dynamic 3D shape measurement
T2  - Measurement Science and Technology
UR  - http://dx.doi.org/10.1088/1361-6501/abddf2
UR  - http://hdl.handle.net/10044/1/87077
VL  - 32
ER  -
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