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| 基于数字图像体相关的物体内部三维位移场分析 | |
| 引用本文： | 牛永强,胡秋实,闫德莹,刘贵全,胡小方,许峰,缪泓,张忠.基于数字图像体相关的物体内部三维位移场分析[J].实验力学,2011,26(3):247-253. |
| 作者姓名： | 牛永强 胡秋实 闫德莹 刘贵全 胡小方 许峰 缪泓 张忠 |
| 作者单位： | 1. 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,安徽,合肥,230027;中国科学技术大学计算机学院,安徽,合肥,230027 2. 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,安徽,合肥,230027 3. 中国科学技术大学计算机学院,安徽,合肥,230027 4. 国家纳米科学中心,北京,100080 |
| 基金项目： | 国家自然科学基金项目(10772171, 10732080)，国家重点基础研究发展计划资助项目(2007CB936803) |
| 摘 要： | 在二维数字图像相关算法的基础上，推导了三维数字图像体相关算法，并应用于物体内部的三维位移场分析。用计算机模拟方法对SR-CT重建的物体内部三维图像施加已知变形，对变形前后三维数字图像进行体相关运算，获得三维位移场。在计算亚像素位移时，本文提出了一种三维的基于灰度梯度的算法，给出了梯度函数，阐述了数字模拟三维体相关的计算过程，通过数字模拟实验证明了算法的正确性和可靠性。 |
| 关 键 词： | 数字图像相关 三维数字图像体相关 三维位移场 灰度梯度算法 |
| 收稿时间： | 5/7/2010 12:00:00 AM |
Internal 3D Displacement Analysis using Digital Image Volumn Correlation Method |
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| NIU Yong-qiang,HU Qiu-shi,YAN De-ying,LIU Gui-quan,HU Xiao-fang,XU Feng,MIAO Hong and ZHANG Zhong.Internal 3D Displacement Analysis using Digital Image Volumn Correlation Method[J].Journal of Experimental Mechanics,2011,26(3):247-253. | |
| Authors: | NIU Yong-qiang HU Qiu-shi YAN De-ying LIU Gui-quan HU Xiao-fang XU Feng MIAO Hong and ZHANG Zhong |
| Institution: | NIU Yong-qiang1,2,HU Qiu-shi1,YAN De-ying2,LIU Gui-quan2,HU Xiao-fang1,XU Feng1,MIAO Hong1,ZHANG Zhong3(1.Key Laboratory of Mechanical Behavior and Design of Chinese Academy of Sciences,University of Science and Technology of China,Hefei 230027,China,2.Department of Computer Science,3.National Center for Nanoscience and Technology,Beijing 100080,China) |
| Abstract: | 3D digital image volumn correlation algorithm was improved based on traditional 2D DIC method, and applied to calculate the internal 3D displacement of an object. Original 3D image was a reconstructed image obtained from SR-CT experiment, and the deformed 3D images were computer simulated images subjected to known deformations. A special 3D sub-pixel algorithm based on gray-level gradient was proposed to determine the sub-pixel displacement, and the 3D gray-level gradient function was presented. The process of 3D DIVC is described in this paper, and the validity of the algorithm is verified. |
| Keywords: | digital image correlation 3D digital image volumn correlation 3D displacement gray-level gradient algorithm |
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