Shape measurement by the use of digital image correlation

Y. H. Huang; C. Quan; C. J. TayL. J. Chen

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Shape measurement by the use of digital image correlation

机译：Shape measurement by the use of digital image correlation

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摘要

Digital image correlation (DIC) using a single camera has been widely used for determination of in-plane displacement. However, in order to obtain shape information on an object, one should employ stereo vision systems with multiple cameras. In this paper, a new method using digital image correlation for shape measurement is developed. In the proposed method, an object with a surface profile is given an inplane translation, and digital image correlation is employed to measure the image displacement. Since the object has a surface height variation, the magnification at each point is different. Thus the image displacement field obtained from the DIC method contains the shape information of the object, which can be retrieved from a pinhole camera model. Principles of the proposed method are described. Experiments conducted to measure a step change and a light bulb show that the method is simple, effective, and suitable for measurement of a step change or a large object.

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来源
《Optical Engineering》 |2005年第8期|087011-1-087011-7-0|共7页
作者
Y. H. Huang; C. Quan; C. J. TayL. J. Chen;
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作者单位

National University of Singapore Department of Mechanical Engineering 10 Kent Ridge Crescent Singapore 119260;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类光学仪器;
关键词
digital image correlation (DIC); shape measurement; magnification variation; pinhole camera model;

Shape measurement by the use of digital image correlation

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