Automatic analysis of moiré fringe patterns by using an image-processing system |
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| Authors: | P -T Ning W -L Peng |
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| Institution: | (1) Engineering Science and Mechanics Department, Virginia Polytechnic Institute and State University, 24061 Blacksburg, VA;(2) Department of Mechanical Engineering, Harbin Shipbuilding Engineering Institute, The People's Republic of China;(3) Electrical Engineering Department, Virginia Polytechnic Institute, Blacksburg, USA;(4) Department of Geography, State University from Beijing Normal University, Beijing, The People's Republic of China |
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| Abstract: | This paper presents the whole process of analyzing moiré fringe patterns by using a computer-image-processing system. The main steps include: recording a fringe pattern, eliminating noise, thinning the fringes, assigning the fringes with fringe-order information, computing the strain field, outputing data tables, data curves, color two-dimensional computational displays and outputing in relief three-dimensional displays which represent strain and displacement. The method is highly automatic and gives visualized pictures and accurate results. |
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