画像処理援用光弾性実験によるゼロ点の自動抽出

概要

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A new method for automatically extracting relatively important zero points among singular points using a computer-assisted photoelastic technique is described. To extract the zero points, the images with the principal-stress directions in the whole field are used, which are automatically obtained on the basis of the "time-series photoelastic data" obtained from rotation of the crossed polaroids. The extraction of zero points involves analysis of the distribution of principal-stress directions around a zero point which differs from that around a regular point. To extract the locations of zero points, a window is moved on an image with the principal-stress directions, and the distribution around the center of the window is compared with a standard distribution around at a zero point. This method is applied to an angular plate under a compressive load. As a result, the accuracy of the extraction is up to 2-3 pixels.
一般社団法人日本機械学会の論文
1995-06-25