Journal ArticleDOI
Two-dimensional digital image correlation for in-plane displacement and strain measurement: a review
TLDR
In this article, a review of the 2D digital image correlation (2D DIC) technique for displacement field measurement and strain field estimation is presented, and detailed analyses of the measurement accuracy considering the influences of both experimental conditions and algorithm details are provided.Abstract:
As a practical and effective tool for quantitative in-plane deformation measurement of a planar object surface, two-dimensional digital image correlation (2D DIC) is now widely accepted and commonly used in the field of experimental mechanics. It directly provides full-field displacements to sub-pixel accuracy and full-field strains by comparing the digital images of a test object surface acquired before and after deformation. In this review, methodologies of the 2D DIC technique for displacement field measurement and strain field estimation are systematically reviewed and discussed. Detailed analyses of the measurement accuracy considering the influences of both experimental conditions and algorithm details are provided. Measures for achieving high accuracy deformation measurement using the 2D DIC technique are also recommended. Since microscale and nanoscale deformation measurement can easily be realized by combining the 2D DIC technique with high-spatial-resolution microscopes, the 2D DIC technique should find more applications in broad areas.read more
Citations
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Journal ArticleDOI
Advances in Computer Vision-Based Civil Infrastructure Inspection and Monitoring
TL;DR: An overview of recent advances in computer vision techniques as they apply to the problem of civil infrastructure condition assessment and some of the key challenges that persist toward the goal of automated vision-based civil infrastructure and monitoring are presented.
Journal ArticleDOI
Digital image correlation for surface deformation measurement: historical developments, recent advances and future goals
Journal ArticleDOI
Mean intensity gradient: An effective global parameter for quality assessment of the speckle patterns used in digital image correlation
Bing Pan,Zixing Lu,Huimin Xie +2 more
TL;DR: In this article, a simple and easy-to-calculate yet effective global parameter, called mean intensity gradient, is proposed for quality assessment of the speckle patterns used in DIC.
Journal ArticleDOI
Fast, Robust and Accurate Digital Image Correlation Calculation Without Redundant Computations
TL;DR: In this article, a Gauss-Newton-based digital image correlation (DIC) method was proposed to eliminate the redundant computations involved in conventional DIC method using forward additive matching strategy and classic Newton-Raphson (FA-NR) algorithm without sacrificing its sub-pixel registration accuracy.
Journal ArticleDOI
Computer vision for SHM of civil infrastructure: From dynamic response measurement to damage detection – A review
Dongming Feng,Maria Q. Feng +1 more
TL;DR: This review paper is intended to summarize the collective experience that the research community has gained from the recent development and validation of the vision-based sensors for structural dynamic response measurement and SHM.
References
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Journal ArticleDOI
The effect of out-of-plane motion on 2D and 3D digital image correlation measurements
TL;DR: In this article, the effect of out-of-plane motion on 2D and 3D digital image correlation measurements is demonstrated using basic theoretical pinhole image equations and experimentally through synchronized, multi-system measurements.
Journal ArticleDOI
Accurate measurement of three-dimensional deformations in deformable and rigid bodies using computer vision
TL;DR: Results indicate that the three-dimensional measurement methodology, when combined with two-dimensional digital correlation for subpixel accuracy, is a viable tool for the accurate measurement of surface displacements and strains.
Journal ArticleDOI
Submicron deformation field measurements: Part 2. Improved digital image correlation
G. Vendroux,Wolfgang G. Knauss +1 more
TL;DR: In this paper, the authors proposed a technique that compares digital images of a specimen surface before and after deformation to deduce its two-dimensional surface displacement field and strain components.
Book ChapterDOI
Advances in Two-Dimensional and Three-Dimensional Computer Vision
TL;DR: Two-dimensional image correlation has been widely used for deformation measurements in a variety of applications including fracture mechanics, biomechanics, constitutive property measurement in complex materials, model verification for large, flawed structures and nondestructive evaluation as discussed by the authors.
Journal ArticleDOI
Systematic errors in digital image correlation due to undermatched subset shape functions
TL;DR: In this paper, the systematic errors that arise from the use of undermatched shape functions, i.e., shape functions of lower order than the actual displacement field, are analyzed, under certain conditions, the shape functions used can be approximated by a Savitzky-Golay low-pass filter applied to the displacement functions, permitting a convenient error analysis.