Novel calibration method for structured-light system with an out-of-focus projector

被引：166

作者：

Li, Beiwen ^{[1
]}

Karpinsky, Nikolaus ^{[1
]}

Zhang, Song ^{[1
]}

机构：

[1] Iowa State Univ, Dept Mech Engn, Ames, IA 50011 USA

来源：

APPLIED OPTICS | 2014年 / 53卷 / 16期

基金：

美国国家科学基金会;

关键词：

3-DIMENSIONAL SHAPE MEASUREMENT; CAMERA CALIBRATION; PROFILOMETRY;

D O I：

10.1364/AO.53.003415

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A structured-light system with a binary defocusing technique has the potential to have more extensive application due to its high speeds, gamma-calibration-free nature, and lack of rigid synchronization requirements between the camera and projector. However, the existing calibration methods fail to achieve high accuracy for a structured-light system with an out-of-focus projector. This paper proposes a method that can accurately calibrate a structured-light system even when the projector is not in focus, making it possible for high-accuracy and high-speed measurement with the binary defocusing method. Experiments demonstrate that our calibration approach performs consistently under different defocusing degrees, and a root-mean-square error of about 73 mu m can be achieved with a calibration volume of 150(H) mm x 250(W) mm x 200(D)mm. (C) 2014 Optical Society of America

引用

页码：3415 / 3426

页数：12

共 31 条

[21] PROPERTIES OF A DEFOCUSED OPTICAL SYSTEM [J].