Lens distortion correction for micro-scale digital image correlation微尺度数字图像相关中的镜头畸变校正

Abstract摘要

This conference paper develops a calibration and correction procedure for lens distortion in microscale digital image correlation. A micro-speckle film made from epoxy and powder is used for rigid-body translation experiments, while the effects of out-of-plane displacement and optical aberration are incorporated into the distortion model. The fitted coefficients are used to correct the DIC displacement field, reducing the relative measurement error by approximately 50% and improving the reliability of microscope-based deformation measurements.

本会议论文建立了微尺度数字图像相关中的镜头畸变标定与修正流程。研究采用由环氧树脂和粉末制成的微散斑膜开展刚体平移实验，并将面外位移和光学像差对测量的影响纳入畸变模型。利用拟合得到的系数修正 DIC 位移场后，相对测量误差降低约 50%，从而提升了显微镜变形测量的可靠性。