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Image Correlation for Shape, Motion and Deformation Measurements: Basic Concepts,Theory and Applications
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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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Enhanced Piola–Hencky discrete models for pantographic sheets with pivots without deformation energy: numerics and experiments
TL;DR: A discrete, finite dimensional, Lagrangian model is formulated for pantographic sheets with perfect pivots and to avoid to face the aforementioned pathologies, and it seems suitable for tackling future structural optimization problems.
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Multiscale Displacement Field Measurement Using Digital Image Correlation: Application to the Identification of Elastic Properties
TL;DR: In this paper, a multiscale approach to finite element-based DIC is proposed to overcome the tricky and well-known compromise between spatial resolution and uncertainty, where additional nearfield images are used to improve locally the resolution of the measurement for a given measurement mesh.
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Large deformation measurement scheme for 3D digital image correlation method
TL;DR: An improved coarse search method is developed to calculate the initial correlation parameters for the seed point, which guarantees that the correlation calculation can be carried out successfully even in large deformation situation.
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Investigation of sub-critical fatigue crack growth in FRP/concrete cohesive interface using digital image analysis
TL;DR: In this paper, the authors investigated the cohesive stress transfer during the sub-critical crack growth associated with the debonding of FRP from concrete under fatigue loading using the direct shear test set-up.
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Digital image correlation in experimental mechanics and image registration in computer vision: Similarities, differences and complements
TL;DR: It is shown that some concepts from the image registration or matching technique can be applied to the digital image correlation technique to substantially enhance its performance, which can help broaden the applications ofdigital image correlation in scientific research and engineering practice.