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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
Method for measuring nanoscale local strain in a dual phase steel using digital image correlation with nanodot patterns
TL;DR: In this paper, a dual phase steel was analyzed using a digital image correlation (DIC) method in association with Ag nanodot patterning, and the optimum size of the nanodots was estimated from image error analyses.
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Concrete cover effect on the bond of GFRP bar and concrete under static loading
TL;DR: In this paper, the authors present an assessment of bond behaviour between GFRP bars and concrete, investigated through set of centric and eccentric pull-out specimens, where the authors used DIC technique for recording and evaluating of strain field on frontal side of eccentric specimens.
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Damage evolution study of sandstone by cyclic uniaxial test and digital image correlation
TL;DR: In this article, the damage evolution process and crack development of sandstone samples subjected to axially cyclic loading with different amplitudes were tested and optical images of specimen surface in loading-unloading periods are presented for digital image correlation (DIC) analysis.
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High-temperature digital image correlation method for full-field deformation measurement captured with filters at 2600°C using spraying to form speckle patterns
TL;DR: In this paper, a method for obtaining good images of a sprayed speckle pattern on specimen surfaces at high temperatures, suitable for strain measurement, by digital image correlation (DIC) using plasma spray for specckle preparation in which a bandpass filter, neutral density filters, and a linear polarizing filter are used to reduce intensity and noise in images.
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High speed image correlation for vibration analysis
TL;DR: In this article, a digital speckle correlation technique has been used for high speed deformation and strain analysis, e.g. in the fields of material testing, fracture mechanics, advanced materials and component testing.