COMPUTERIZED IMAGE-PROCESSING FOR WHOLE-FIELD DETERMINATION OF ISOCLINICS AND ISOCHROMATICS
COMPUTERIZED IMAGE-PROCESSING FOR WHOLE-FIELD DETERMINATION OF ISOCLINICS AND ISOCHROMATICS
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DOI：
10.1007/bf02317980
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发表时间：
1992-03-01
影响因子：
2.4
通讯作者：
VARADAN, TK
中科院分区：
文献类型：
--
作者：
SARMA, AVSSSR;PILLAI, SA;VARADAN, TK
本文提出了一种新的全场测定应力光弹模型等倾线和等色线参数的计算机方法。从平面偏光镜中的三个分析器位置（0度、45度和90度）处的条纹图案获得的强度数据用于计算。利用偏振光的斯托克斯表示导出了强度值与光弹性参数之间的关系。实验是使用计算机图像处理系统进行的。通过比较理论值和测量值来评估所达到的准确度。精度在+/- 3度的等倾线和+/- 0.05条纹等差线被证明是可能的。
A new computerized method for the whole-field determination of isoclinic and isochromatic parameters in a stressed photoelastic model is presented. The intensity data obtained from the fringe pattern at three analyzer positions (0, 45, and 90 degrees) in a plane polariscope, are used for the computations. The relationships between the intensity values and the photoelastic parameters are derived using Stokes representation of polarized light. The experiments were carried out using a computer-based image-processing system. The accuracy achieved is assessed by comparing the theoretical and measured values. Accuracies of within +/- 3 degrees for isoclinics and +/- 0.05 fringe for isochromatics are shown to be possible.