| 物体内部三维位移场分析的数字图像相关方法 |
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| 引用本文： | 汪敏,胡小方,伍小平.物体内部三维位移场分析的数字图像相关方法[J].物理学报,2006,55(10):5135-5139. |
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| 作者姓名： | 汪敏 胡小方 伍小平 |
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| 作者单位： | 中国科学技术大学，中国科学院材料力学行为和设计重点实验室，合肥 230026 |
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| 基金项目： | 国家自然科学基金;北京市同步辐射实验室基金 |
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| 摘 要： | 提出了物体内部三维位移场的数字图像相关分析方法，对物体变形前后，或连续变形的两个相邻状态的内部三维结构的数字图像，通过相关运算获得三维位移场.文中给出了三维相关法的体搜索窗口、相关函数及亚像素运算的相关系数拟合函数.数字模拟结果证明了三维相关法的正确性及可靠性.位移计算精度为0.02像素.
关键词：
数字图像相关
三维相关
亚像素
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| 关 键 词： | 数字图像相关 三维相关 亚像素 |
| 收稿时间： | 12 21 2005 12:00AM |
| 修稿时间： | 2005-12-212006-01-16 |
Digital image correlation method for the analysis of 3-D internal displacement field in object |
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| Wang Min,Hu Xiao-Fang,Wu Xiao-Ping.Digital image correlation method for the analysis of 3-D internal displacement field in object[J].Acta Physica Sinica,2006,55(10):5135-5139. |
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| Authors: | Wang Min Hu Xiao-Fang Wu Xiao-Ping |
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| Institution: | Chinese Academy of Sciences Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | In this paper, the digital image correlation method for the analysis of 3-D displacement field is firstly presented. The 3-D displacement field caused by internal microstructures evolution is obtained by correlative calculation of digital images taken before and after deformation of the object. The 3-D searching window, correlation function and the fitted function of correlation coefficient are obtained. The numerical simulation results confirmed this technique. The precision of displacement measuvement is 0.02 pixel. |
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| Keywords: | digital image correlation 3-D correlation sub-pixel |
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