影像科学与光化学2024，Vol.42Issue(1)：9-15,7.DOI:10.7517/issn.1674-0475.230804
数字图像相关方法中基于改进IC-GN算法高精度形变测量研究
Research on High-precision Deformation Measurement Based on Improved IC-GN Algorithm in Digital Image Correlation Methods
摘要
Abstract
In the measurement of object deformation using digital image correlation methods,the FA-NR algorithm achieves high-precision measurement,while the IC-GN algorithm improves measurement efficiency on this basis.To further improve measurement accuracy,an improved algorithm based on IC-GN(GIC-GN)was proposed.By using the gradient method to obtain a more accurate sub pixel displacement at the known initial position of the entire pixel,the error generated in the Hessian matrix calculation process is reduced,and the convergence speed of the iteration is accelerated,effectively improving measurement accuracy and efficiency.The simulation experiment verification results show that the error of GIC-GN algorithm can be stable between 10-4-10-3 pixel,and the accuracy of IC-GN algorithm is improved by 10％-60％compared to FA-NR algorithm.The time consumption is 0.1 times that of FA-NR algorithm and 0.8 times that of IC-GN algorithm,which can achieve high-precision and efficient measurement of object deformation information.关键词
数字图像相关/IC-GN算法/Hessian矩阵/高精度/高效率Key words
digital image correlation/IC-GN algorithm/Hessian matrix/high precision/high efficiency引用本文复制引用
孙泽刚,张奎,蒋强,黎军华..数字图像相关方法中基于改进IC-GN算法高精度形变测量研究[J].影像科学与光化学,2024,42(1):9-15,7.基金项目
四川省科技计划项目(2022YFG0075) （2022YFG0075）
