Least-squares calibration method for fringe projection profilometry with some practical considerations

被引：11

作者：

Fu, Yanjun ^{[1
]}

Wang, Yonglong ^{[1
]}

Wang, Wei ^{[1
]}

Wu, Jianfeng ^{[1
]}

机构：

[1] Nanchang Hangkong Univ, Key Lab Image Proc & Pattern Recognit, Nanchang 330063, Jiangxi, Peoples R China

来源：

OPTIK | 2013年 / 124卷 / 19期

关键词：

Three-dimensional profile measurement; Fringe projection profilometry; Look-up table; Least-squares calibration; 3-DIMENSIONAL SHAPE MEASUREMENT;

D O I：

10.1016/j.ijleo.2012.12.041

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Fringe projection profilometry (FPP) is a widely used three-dimensional profile measurement technique. One vital step in this technique is calibration, which determines the system accuracy. The least-squares method, because of its flexibility and simplicity, is commonly used in system calibration for FPP. However, calibration results are affected by the nonlinear gamma of the projector and projection fringe cycle broadening. This paper proposes a new look-up table (LUT) generation method by analyzing the differences between the real and ideal unwrapped phases. The aforementioned problems could then be solved after the phase error is compensated by the LUT. Finally, the validity of the proposed method is demonstrated through experiments, and the accuracy reaches 0.02 mm. (c) 2013 Elsevier GmbH. All rights reserved.

引用

页码：4041 / 4045

页数：5

共 20 条

[1] Overview of three-dimensional shape measurement using optical methods [J].