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Optical Engineering

Lens distortion correction for digital image correlation by measuring rigid body displacement
Author(s): Satoru Yoneyama; Hisao Kikuta; Akikazu Kitagawa; Koji Kitamura
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Paper Abstract

A method of lens distortion correction is proposed in order to improve the measurement accuracy of digital image correlation for two-dimensional displacement measurement. The amounts of lens distortion are evaluated from displacement distributions obtained in a rigid body in-plane translation or rotation test. After detecting the lens distortion, its coefficient is determined using the method of least squares. Then, the corrected displacement distributions are obtained. The effectiveness of the proposed method is demonstrated by applying the correction method to an in-plane translation test and tension tests. The experimental results show that the proposed distortion correction method eliminates the effect of lens distortion from measured displacements.

Paper Details

Date Published: 1 February 2006
PDF: 9 pages
Opt. Eng. 45(2) 023602 doi: 10.1117/1.2168411
Published in: Optical Engineering Volume 45, Issue 2
Show Author Affiliations
Satoru Yoneyama, Osaka Prefecture Univ. (Japan)
Hisao Kikuta, Osaka Prefecture Univ. (Japan)
Akikazu Kitagawa, Hitachi Zosen Corp. (Japan)
Koji Kitamura, Hitachi Zosen Corp. (Japan)

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