Camera nonlinear distortion correction based on coplanar points

Feng, 叶峰 Ye; Min, 王敏 Wang; Jian-dong, 陈剑东 Chen; Zheng, 洪峥 Hong; Yi-zong, 赖乙宗 Lai

doi:10.3788/ope.20152310.2962

Cited by 2 publications

(1 citation statement)

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“…The operation of a binocular vision system is complex owing to calibration [14] and synchronisation exposure [15]. For specific situations, such as centrosymmetric 3D deformation measurements, a single-lens stereovision system is employed because of the complexity of stereovision methods.…”

Section: Introductionmentioning

confidence: 99%

Single-camera displacement field correlation method for centrosymmetric 3D dynamic deformation measurement

Zhao¹,

Wen²,

Liu³

et al. 2018

Meas. Sci. Technol.

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Three-dimensional (3D) deformation measurements are a key issue in experimental mechanics. In this paper, a displacement field correlation (DFC) method to measure centrosymmetric 3D dynamic deformation using a single camera is proposed for the first time. When 3D deformation information is collected by a camera at a tilted angle, the measured displacement fields are coupling fields of both the in-plane and out-of-plane displacements. The features of the coupling field are analysed in detail, and a decoupling algorithm based on DFC is proposed. The 3D deformation to be measured can be inverted and reconstructed using only one coupling field. The accuracy of this method was validated by a high-speed impact experiment that simulated an underwater explosion. The experimental results show that the approach proposed in this paper can be used in 3D deformation measurements with higher sensitivity and accuracy, and is especially suitable for high-speed centrosymmetric deformation. In addition, this method avoids the non-synchronisation problem associated with using a pair of high-speed cameras, as is common in 3D dynamic measurements.

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Section: Introductionmentioning

confidence: 99%