光学精密工程2025，Vol.33Issue(18)：2857-2867,11.DOI:10.37188/OPE.20253318.2857
基于散斑去模糊的数字图像相关深度量程拓展
Depth range extension in digital image correlation through speckle deblurring
摘要
Abstract
In the vibration measurement of two-dimensional digital image correlation technology(2D-DIC),the limited depth range will cause speckle image blurring when the out-of-plane displacement of the speckle is too large.In order to realize the expansion of the depth range,this paper proposed a deblurring method for defocusing speckles that combined Wiener filtering and adaptive local smoothing.The method first analyzed the mechanism of defocus blur in speckle images and used Wiener filtering to restore the orig-inal blurred images.Subsequently,an adaptive local smoothing strategy was introduced to suppress the ringing effect caused by Wiener filter deconvolution.Finally,to verify the effectiveness of the proposed method,experiments were conducted on defocused speckle deblurring,out-of-plane displacement mea-surement,and vibration measurement.In the experiment of defocused deblurring effect,the speckle im-age obtained a higher average intensity gradients and a smaller optimal subset sizes,indicating that the new method could effectively improve the speckle contrast and produced high-quality restored images.In the out-of-plane displacement reconstruction experiment,the maximum dynamic measurement range was in-creased by 9%,and the dispersion degree of the measured value of the out-of-plane displacement was re-duced by 8.8%compared with the real value,which effectively extended the depth range of 2D-DIC.In the actual vibration measurement,the method improved the signal-to-noise ratio of periodic vibration by 5.5%,and reduced the mean error by 2.4%,which effectively increased the measurement accuracy of 2D-DIC.The proposed method in this paper significantly expands the measurement capability of traditional 2D-DIC in the depth direction,and provides reliable technical support for full-field vibration monitoring in complex dynamic scenarios.关键词
散斑去模糊/深度量程拓展/数字图像相关技术/离面位移/维纳滤波Key words
speckle deblurring/depth range extension/digital image correlation/out-of-plane displace-ment/wiener filtering分类
信息技术与安全科学引用本文复制引用
黄海昇,倪梓浩,白玉磊,董博..基于散斑去模糊的数字图像相关深度量程拓展[J].光学精密工程,2025,33(18):2857-2867,11.基金项目
国家自然科学基金资助项目(No.62171140) （No.62171140）
