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Image Correlation for Shape, Motion and Deformation Measurements: Basic Concepts,Theory and Applications
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TLDR
In this paper, a comprehensive overview of image correlation for shape, motion and deformation measurements is provided. But, the authors do not discuss the effect of out-of-plane motion on 2D measurements.Abstract:
Image Correlation for Shape, Motion and Deformation Measurements provides a comprehensive overview of data extraction through image analysis. Readers will find and in-depth look into various single- and multi-camera models (2D-DIC and 3D-DIC), two- and three-dimensional computer vision, and volumetric digital image correlation (VDIC). Fundamentals of accurate image matching are described, along with presentations of both new methods for quantitative error estimates in correlation-based motion measurements, and the effect of out-of-plane motion on 2D measurements. Thorough appendices offer descriptions of continuum mechanics formulations, methods for local surface strain estimation and non-linear optimization, as well as terminology in statistics and probability. With equal treatment of computer vision fundamentals and techniques for practical applications, this volume is both a reference for academic and industry-based researchers and engineers, as well as a valuable companion text for appropriate vision-based educational offerings.read more
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Journal ArticleDOI
Photogrammetry and optical methods in structural dynamics – A review
TL;DR: In this paper, the most current trends in the photogrammetry technique (point tracking, digital image correlation, and target-less approaches) are reviewed and compared to other measurement techniques used in structural dynamics (e.g., laser Doppler vibrometry and interferometry).
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Dynamic rock tests using split Hopkinson (Kolsky) bar system – A review
Kaiwen Xia,Wei Yao +1 more
TL;DR: In this paper, a detailed review of the detailed procedures and principles of techniques for dynamic rock tests using split Hopkinson bars is presented, followed by the key loading techniques that are useful for dynamic tests with SHPB (i.e., pulse shaping, momentum-trap and multi-axial loading techniques).
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Equivalence of digital image correlation criteria for pattern matching.
TL;DR: This paper focuses on three robust and most widely used correlation criteria, i.e., a zero-mean normalized cross-correlation (ZNCC) criterion, a Zero normalized sum of squared difference criterion, and a parametric sum of squares difference (PSSD(ab) criterion with two additional unknown parameters, since they are insensitive to the scale and offset changes of the target subset intensity and have been highly recommended for practical use in literature.
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Comparison of Local and Global Approaches to Digital Image Correlation
François Hild,Stéphane Roux +1 more
TL;DR: It is shown that global approaches generally out-perform a local approach when the displacement interpolation is based upon bilinear shape functions (i.e., with four-node quadrilaterals).
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Determination of mechanical properties and full-field strain measurements of rock material under dynamic loads
Qianbing Zhang,Jian Zhao +1 more
TL;DR: A detailed experimental procedure for the quantitative determination of mechanical properties and full-field strain measurement of rock material under dynamic loads was presented in this paper, where three kinds of testing methods, i.e., notched semi-circular bending, Brazilian disc, and uniaxial compression, were conducted using a split Hopkinson pressure bar (SHPB) system.