Lens distortion correction for digital image correlation by measuring rigid body displacement
Lens distortion correction for digital image correlation by measuring rigid body displacement
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DOI：
10.1117/1.2168411
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发表时间：
2006-02-01
影响因子：
1.3
通讯作者：
Kitamura, K
中科院分区：
文献类型：
--
作者：
Yoneyama, S;Kikuta, H;Kitamura, K
为了提高数字图像相关法测量二维位移的精度，提出了一种透镜畸变校正方法。透镜畸变的量由在刚体面内平移或旋转测试中获得的位移分布来评估。在检测出透镜畸变后，利用最小二乘法确定其系数。然后，得到修正后的位移分布。通过将修正方法应用于面内平移试验和拉伸试验，验证了该方法的有效性。实验结果表明，所提出的畸变校正方法消除了透镜畸变对测量位移的影响。(c)2006年，由光学仪器工程师协会（Society of Photo-Optical Instrumentation Engineers）主办。
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. (c) 2006 Society of Photo-Optical Instrumentation Engineers.