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High-speed digital-image correlation method
Optics Letters, 2009Provided that the software and hardware equipment in a digital-image correlation method is unchanged, the only major factor affecting integer-pixel correlation computation precision and the integer-pixel processing time is the size of the computing window.
Min, Wang, Hao, Wang, Yuwan, Cen
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Digital Image Correlation (DIC)
2021Digital image correlation (DIC) is a full-field non-contacting optical method that can capture the shape, motion, and deformation of solid objects. The basis of the method is the matching of the gray values of points from an image of the surface of an object before and after deformation.
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Reliability-guided digital image correlation for image deformation measurement
Applied Optics, 2009A universally applicable reliability-guided digital image correlation (DIC) method is proposed for reliable image deformation measurement. The zero-mean normalized cross correlation (ZNCC) coefficient is used to identify the reliability of the point computed.
Bing Pan
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Pulse Signals Detection by Digital Image Correlation
2008 International Conference on BioMedical Engineering and Informatics, 2008The pulse diagnosis is an essential method in traditional Chinese medicine and the pulse wave embodies the abundant physiological and pathological information about the health status. In order to obtain the complete and objective pulse tactile information, the sensor for detecting pulse tactile image was developed.
Aihua Zhang +3 more
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Global and local coordinates in digital image correlation
Applied Optics, 2007Digital image correlation (DIC) is commonly used to measure specimen displacements by correlating an image of a specimen in an undeformed or reference configuration and a second image under load. To establish the correlation between the images, numerical techniques are used to locate an initially square image subset in a reference image.
Sun, W., Quan, C., Tay, C.J., He, X.
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AFM image reconstruction for deformation measurements by digital image correlation
Nanotechnology, 2006The scanner drift of the atomic force microscope (AFM) is a great disadvantage to the application of digital image correlation to micro/nano-scale deformation measurements. This paper has addressed the image distortion induced by the scanner drifts and developed a method to reconstruct AFM images for the successful use of AFM image correlation.
Yaofeng, Sun, John H L, Pang
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2016
In order to detect the occurrence of failure in a material, visual observation is a very intuitive approach. Although global failure is many times easier to observe visually, more dedicated analysis is required to detect small changes indicating the occurrence of first failure.
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In order to detect the occurrence of failure in a material, visual observation is a very intuitive approach. Although global failure is many times easier to observe visually, more dedicated analysis is required to detect small changes indicating the occurrence of first failure.
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Applied Optics, 2010
The three-dimensional digital image correlation (3D-DIC) method is rapidly developing and is being widely applied to engineering and manufacturing. Despite its extensive use, the error caused by different image matching algorithms is seldom discussed. An algorithm for 3D speckle image generation is proposed, and the performances of different subpixel ...
Zhenxing, Hu +4 more
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The three-dimensional digital image correlation (3D-DIC) method is rapidly developing and is being widely applied to engineering and manufacturing. Despite its extensive use, the error caused by different image matching algorithms is seldom discussed. An algorithm for 3D speckle image generation is proposed, and the performances of different subpixel ...
Zhenxing, Hu +4 more
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Overview of Digital Image Correlation
2015This chapter provides an introduction to the methods for measuring the field of displacement and strain on the surface of a specimen by means of digital image correlation (DIC) techniques. Both its two-dimensional and three-dimensional versions are presented. A simplified overview of the algorithms underlying such a method is provided.
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Digital image correlation for structural measurements
Proceedings of the Institution of Civil Engineers - Civil Engineering, 2012Digital image correlation is an optical imaging technique that compares images taken of a structure and is well established for laboratory measurements. By processing pairs of images under different loading conditions, the full-field deformation of the structure can be measured.
Nick McCormick, Jerry Lord
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