Finite element formulation for a digital image correlation method.
Finite element formulation for a digital image correlation method.
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DOI：
10.1364/ao.44.007357
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发表时间：
2005-12
期刊：
影响因子：
1.9
通讯作者：
Yaofeng Sun;J. Pang;C. K. Wong;Fei Su
中科院分区：
文献类型：
--
作者：
Yaofeng Sun;J. Pang;C. K. Wong;Fei Su
提出了一种直接确定数字图像相关过程中完整的二维位移场的数字图像相关方法的有限元公式。利用我们的算法将整个感兴趣的图像区域离散成有限元，这些有限元参与到共同的图像相关过程中。与基于子集的图像相关方法相比，这种基于有限元形式的图像相关方法满足了图像元素间的位移连续性和导数连续性的要求，具有一定的优势。数值研究和实际实验验证了所提公式的正确性。结果表明，与有限元公式的图像相关在计算上是有效的、准确的和稳健的。
A finite element formulation for a digital image correlation method is presented that will determine directly the complete, two-dimensional displacement field during the image correlation process on digital images. The entire interested image area is discretized into finite elements that are involved in the common image correlation process by use of our algorithms. This image correlation method with finite element formulation has an advantage over subset-based image correlation methods because it satisfies the requirements of displacement continuity and derivative continuity among elements on images. Numerical studies and a real experiment are used to verify the proposed formulation. Results have shown that the image correlation with the finite element formulation is computationally efficient, accurate, and robust.