A two-step phase-shifting algorithm dedicated to fringe projection profilometry

被引：11

作者：

Yin, Yongkai ^{[1
]}

Mao, Jiaqi ^{[1
]}

Meng, Xiangfeng ^{[1
]}

Yang, Xiulun ^{[1
]}

Wu, Ke ^{[2
]}

Xi, Jiangtao ^{[3
]}

Sun, Baoqing ^{[1
]}

机构：

[1] Shandong Univ, Sch Informat Sci & Engn, Shandong Prov Key Lab Laser Technol & Applicat, Qingdao 266237, Peoples R China

[2] Cent China Normal Univ, Natl Engn Res Ctr E Learning, Wuhan 430079, Peoples R China

[3] Univ Wollongong, Sch Elect Comp & Telecommun Engn, Wollongong, NSW 2522, Australia

来源：

OPTICS AND LASERS IN ENGINEERING | 2021年 / 137卷

关键词：

Two-step phase-shifting; Fringe projection profilometry (FPP); Phase error; 3D measurement; Fourier transform profilometry (FTP); 3-DIMENSIONAL SHAPE MEASUREMENT; FOURIER-TRANSFORM PROFILOMETRY; HIGH-SPEED; 3D; PATTERNS; ERROR;

D O I：

10.1016/j.optlaseng.2020.106372

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Improving the time efficiency of fringe projection profilometry (FPP) is an attractive problem. For FPP using phase-shifting, it is desired to improve the efficiency by reducing the step number for phase retrieval. This paper proposes a two-step phase-shifting algorithm dedicated to FPP. Considering the physical process of FPP, the captured fringe image is formulated with two variables, i.e. surface reflectance and phase value. And a phase shift is introduced to get the two equations, which lead to the close-form solution for phase calculation. Then the phase error due to ambient light is analyzed via a line-circle model, and an algorithm of refining the phase calculation is proposed based on the estimation of the actual fringe contrast. The validity of the proposed approach is demonstrated with experiments.

引用

页数：7

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