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Digital image analysis around isotropic points for photoelastic pattern recognition

机译：各向同性点周围的数字图像分析，用于光弹性模式识别

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Fringe tracking and fringe order assignment have become the central topics of current research in digital photoelasticity. Isotropic points (IPs) appearing in low fringe order zones are often either overlooked or entirely missed in conventional as well as digital photoelasticity. We aim to highlight image processing for characterizing IPs in an isochromatic fringe field. By resorting to a global analytical solution of a circular disk, sensitivity of IPs to small changes in far-field loading on the disk is highlighted. A local theory supplements the global closed-form solutions of three-, four-, and six-point loading configurations of circular disk. The local theoretical concepts developed in this paper are demonstrated through digital image analysis of isochromatics in circular disks subjected to three- and four-point loads.
机译：条纹跟踪和条纹顺序分配已成为当前数字光弹性研究的中心主题。在低条纹阶数区域中出现的各向同性点（IPs）在传统以及数字光弹性中经常被忽略或完全被忽略。我们旨在重点介绍用于表征等色边缘场中IP的图像处理。通过采用圆形磁盘的全局分析解决方案，可以突出显示IP对磁盘远场负载的微小变化的敏感性。局部理论补充了圆盘三点，四点和六点加载配置的整体封闭形式解决方案。通过对三点和四点载荷下的圆盘中的等色物进行数字图像分析，证明了本文开发的局部理论概念。

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