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Optical Engineering

Least-squares calibration method for fringe projection profilometry
Author(s): Hongwei Guo; Haitao He; Yingjie Yu; Mingyi Chen
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Paper Abstract

This paper presents a novel calibration approach for determining the mapping relationship between the depth map and the phase difference in fringe projection profilometry. This approach is based on a simple nonlinear function, which is deduced by analyzing the geometry of measurement system and hence perfectly describes the mapping between the depth map and the phase-difference distribution. The calibration is implemented by translating a target plane to a sequence of given positions with known depths, and measuring its phase distributions. A least-squares estimation algorithm with linear computation is deduced to retrieve the related parameters and to reconstruct the mapping function. Both computer simulation and experiment are carried out to demonstrate the validity of this technique.

Paper Details

Date Published: 1 March 2005
PDF: 9 pages
Opt. Eng. 44(3) 033603 doi: 10.1117/1.1871832
Published in: Optical Engineering Volume 44, Issue 3
Show Author Affiliations
Hongwei Guo, Shanghai Univ. (China)
Haitao He, Shanghai Univ. (China)
Yingjie Yu, Shanghai Univ. (China)
Mingyi Chen, Shanghai Univ. (China)

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