数字图像相关方法若干关键问题研究进展
发布时间：2019-01-02 12:26
【摘要】：本文报道了作者及其所在课题组近期在数字图像相关(DIC)测量方法上取得的重要研究进展。主要包括:(1)通过对DIC方法中反向组合高斯-牛顿算法的理论误差分析,提出了新的理论误差公式,进一步证明了反向组合高斯-牛顿算法在提高计算速度和测量精度方面的综合优势;(2)采用提出的理论误差公式,发展了数字散斑场的优化及制作方法,保证了测量结果的一致性和正确性;(3)基于相机阵列和图像拼接技术,发展了超分辨率数字图像相关方法,大大提高了DIC测量方法的应变测量分辨率;(4)提出了大视场条件下的三维系统标定方法,实现了三维测量系统的外参实时标定和多相机测量系统中相机位姿的自动矫正;(5)研制了便携式原位三维测量仪和多尺度DIC测量系统,实现了三维实时数字图像相关测量,进一步满足了DIC方法在工业在线检测和医学领域中的应用需求。
[Abstract]:In this paper, the author and his research group have made important progress in digital image correlation (DIC) measurement. The main contents are as follows: (1) by analyzing the theoretical error of the inverse combination Gao Si Newton algorithm in the DIC method, a new theoretical error formula is proposed. It is further proved that the inverse combination Gao Si Newton algorithm has a comprehensive advantage in improving the calculation speed and measuring accuracy. (2) the optimization and fabrication method of digital speckle field is developed by using the theoretical error formula, which ensures the consistency and correctness of the measurement results. (3) based on camera array and image splicing technology, the super-resolution digital image correlation method is developed, which greatly improves the strain measurement resolution of DIC measurement method. (4) the calibration method of 3D system under the condition of large field of view is proposed, which realizes the real-time calibration of external parameters of 3D measurement system and the automatic correction of camera position and posture in multi-camera measurement system. (5) A portable in-situ 3D measurement instrument and a multi-scale DIC measurement system are developed. The real-time 3D digital image correlation measurement is realized, which meets the needs of the application of DIC method in the field of industrial on-line detection and medicine.
【作者单位】： 东南大学工程力学系;江苏省工程力学分析重点实验室;山东理工大学交通与车辆工程学院;东南大学电子电工实验中心;东南大学仪器科学与工程学院;
【基金】：国家自然科学基金资助项目(11272089,11327201,11532005,11602056) 国家科技支撑计划(2014BAK11B04)资助
【分类号】：TP391.41
[Abstract]:In this paper, the author and his research group have made important progress in digital image correlation (DIC) measurement. The main contents are as follows: (1) by analyzing the theoretical error of the inverse combination Gao Si Newton algorithm in the DIC method, a new theoretical error formula is proposed. It is further proved that the inverse combination Gao Si Newton algorithm has a comprehensive advantage in improving the calculation speed and measuring accuracy. (2) the optimization and fabrication method of digital speckle field is developed by using the theoretical error formula, which ensures the consistency and correctness of the measurement results. (3) based on camera array and image splicing technology, the super-resolution digital image correlation method is developed, which greatly improves the strain measurement resolution of DIC measurement method. (4) the calibration method of 3D system under the condition of large field of view is proposed, which realizes the real-time calibration of external parameters of 3D measurement system and the automatic correction of camera position and posture in multi-camera measurement system. (5) A portable in-situ 3D measurement instrument and a multi-scale DIC measurement system are developed. The real-time 3D digital image correlation measurement is realized, which meets the needs of the application of DIC method in the field of industrial on-line detection and medicine.
【作者单位】： 东南大学工程力学系;江苏省工程力学分析重点实验室;山东理工大学交通与车辆工程学院;东南大学电子电工实验中心;东南大学仪器科学与工程学院;
【基金】：国家自然科学基金资助项目(11272089,11327201,11532005,11602056) 国家科技支撑计划(2014BAK11B04)资助
【分类号】：TP391.41
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