Determining displacement and strain maps immune from aliasing effect with the grid method

被引：26
作者：
Sur, Frederic [1 ]
Blaysat, Benoit [2 ]
Grediac, Michel [2 ]
机构：
[1] Univ Lorraine, CNRS, INRIA Projet Magrit, Lab Lorrain Rech Informat & Ses Applicat LORIA,UM, Campus Sci BP 239, F-54506 Vandoeuvre Les Nancy, France
[2] Univ Blaise Pascal, Clermont Univ, CNRS, Inst Pascal,UMR 6602, BP 10448, F-63000 Clermont Ferrand, France
来源：
OPTICS AND LASERS IN ENGINEERING | 2016年 / 86卷
关键词：
Aliasing; Spectrum folding; Grid method; Displacement; QUASI-PERIODIC NOISE; FOURIER-TRANSFORM; FIELD; MOIRE;
D O I：
10.1016/j.optlaseng.2016.06.010
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Spatial aliasing may affect methods based on grid image processing to retrieve displacement and strain maps in experimental mechanics. Such methods aim at estimating these maps on the surface of a specimen subjected to a loading test. Aliasing, which is often not noticeable to the naked eye in the grid images, may give spurious fringes in the strain maps. This paper presents an analysis of aliasing in this context and provides the reader with simple guidelines to minimize the effect of aliasing on strain maps extracted from grid images. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：317 / 328
页数：12
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