Phase unwrapping using geometric constraints for high-speed fringe projection based 3D measurements

2013 ◽  
Author(s):  
Christian Bräuer-Burchardt ◽  
Peter Kühmstedt ◽  
Gunther Notni
Keyword(s):  
High Speed ◽  
Phase Unwrapping ◽  
Geometric Constraints ◽  
Fringe Projection ◽  
3D Measurements

scholarly journals Practical considerations for high speed real-time 3D measurements by the fringe projection

2017 ◽  
Author(s):  
Shijie Feng ◽  
Qian Chen ◽  
Chao Zuo ◽  
Anand Asundi
Keyword(s):  
Real Time ◽  
High Speed ◽  
Fringe Projection ◽  
3D Measurements

High-speed and high-accuracy fringe projection profilometry without phase unwrapping

2021 ◽  
Vol 140 ◽  
pp. 106518
Author(s):  
Huaxia Deng ◽  
Xing Ling ◽  
Yuyu Wang ◽  
Pengcheng Yao ◽  
Mengchao Ma ◽  
...  
Keyword(s):  
High Speed ◽  
High Accuracy ◽  
Phase Unwrapping ◽  
Fringe Projection ◽  
Fringe Projection Profilometry

scholarly journals Absolute Phase Retrieval Using One Coded Pattern and Geometric Constraints of Fringe Projection System

2018 ◽  
Vol 8 (12) ◽  
pp. 2673 ◽  
Author(s):  
Xu Yang ◽  
Chunnian Zeng ◽  
Jie Luo ◽  
Yu Lei ◽  
Bo Tao ◽  
...  
Keyword(s):  
Phase Shift ◽  
Phase Retrieval ◽  
Code Word ◽  
Geometric Constraints ◽  
Fringe Projection ◽  
Average Intensity ◽  
Fringe Order ◽  
Projection System ◽  
Absolute Phase ◽  
Three Phase

Fringe projection technologies have been widely used for three-dimensional (3D) shape measurement. One of the critical issues is absolute phase recovery, especially for measuring multiple isolated objects. This paper proposes a method for absolute phase retrieval using only one coded pattern. A total of four patterns including one coded pattern and three phase-shift patterns are projected, captured, and processed. The wrapped phase, as well as average intensity and intensity modulation, are calculated from three phase-shift patterns. A code word encrypted into the coded pattern can be calculated using the average intensity and intensity modulation. Based on geometric constraints of fringe projection system, the minimum fringe order map can be created, upon which the fringe order can be calculated from the code word. Compared with the conventional method, the measurement depth range is significantly improved. Finally, the wrapped phase can be unwrapped for absolute phase map. Since only four patterns are required, the proposed method is suitable for real-time measurement. Simulations and experiments have been conducted, and their results have verified the proposed method.

Sign in / Sign up

Export Citation Format

Share Document