Multiscale displacement field measurements of compressed mineral-wool samples by digital image correlation.
Multiscale displacement field measurements of compressed mineral-wool samples by digital image correlation.
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DOI：
10.1364/ao.41.006815
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发表时间：
2002-11
期刊：
影响因子：
1.9
通讯作者：
F. Hild;B. Raka;M. Baudequin;S. Roux;F. Cantelaube
中科院分区：
文献类型：
--
作者：
F. Hild;B. Raka;M. Baudequin;S. Roux;F. Cantelaube
提出了一种利用数字图像相关性确定位移场的多尺度方法。首先在粗分辨率图像上估计位移场，然后随着位移越来越安全和准确地确定，在分析中引入逐渐精细的细节。为了提高图像匹配算法的稳健性、准确性和可靠性，已经开发了这样的方案。该过程用于两种不同类型的示例。第一种是处理被精确和有目的地变形的代表性形象，以评估内在的表现。特别地，确定了最大可测量应变。第二个案例涉及对矿棉样品进行压缩实验时拍摄的一系列照片。分析了程序的不同步骤，并评估了它们各自的作用。反射图像和透射图像都进行了测试。
We propose a multiscale approach to determine the displacement field by digital image correlation. The displacement field is first estimated on a coarse resolution image and progressively finer details are introduced in the analysis as the displacement is more and more securely and accurately determined. Such a scheme has been developed to increase the robustness, accuracy, and reliability of the image-matching algorithm. The procedure is used on two different types of examples. The first one deals with a representative image that is deformed precisely and purposefully to assess the intrinsic performances. In particular, the maximum measurable strain is determined. The second case deals with a series of pictures taken during compression experiments on mineral-wool samples. The different steps ofthe procedure are analyzed and their respective role is assessed. Both reflection and transmission images are tested.