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Title: Determination of three-dimensional displacement using two-dimensional digital image correlation
Authors: Quan, C. 
Tay, C.J. 
Sun, W. 
He, X.
Issue Date: 1-Feb-2008
Citation: Quan, C., Tay, C.J., Sun, W., He, X. (2008-02-01). Determination of three-dimensional displacement using two-dimensional digital image correlation. Applied Optics 47 (4) : 583-593. ScholarBank@NUS Repository.
Abstract: A novel method that uses a two-dimensional (2D) digital image correlation (DIC) based on a single CCD camera to measure three-dimensional (3D) displacement and deformation is proposed. Rigid-body displacement in 3D space consists of both in-plane and out-of-plane components. The presence of an in-plane displacement component results in a shift of the center of the image displacement vector, while the slope of the image displacement vector is related to the out-of-plane displacement component. Global DIC is employed to determine the displaced position of each point on an object based on a linear distribution characteristic of the displacement vector. Speckle images with deformation introduced by 3D displacement are generated to demonstrate the feasibility of the proposed method. In the 3D rigid-body displacement, both in-plane and out-of-plane displacement components are separated by determining the intercept and slope of the image displacement vector. In the 3D deformation, a zero order displacement (pure rigid-body displacement) mode is assumed in a small subset of pixels. Simulated and experimental results demonstrate that both in-plane and out-of-plane displacements can be accurately retrieved using the proposed method. © 2008 Optical Society of America.
Source Title: Applied Optics
ISSN: 00036935
DOI: 10.1364/AO.47.000583
Appears in Collections:Staff Publications

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