1 February 2006 Lens distortion correction for digital image correlation by measuring rigid body displacement
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Optical Engineering, 45(2), 023602 (2006). doi:10.1117/1.2168411
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.
Satoru Yoneyama, Hisao Kikuta, Akikazu Kitagawa, Koji Kitamura, "Lens distortion correction for digital image correlation by measuring rigid body displacement," Optical Engineering 45(2), 023602 (1 February 2006). http://dx.doi.org/10.1117/1.2168411
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KEYWORDS
Distortion

Digital image correlation

Optical engineering

Zoom lenses

Calibration

Target detection

Cameras

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