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Comparison between different elastic imaging techniques on 2D OBS data
SEG Technical Program Expanded Abstracts 2001, 2001We present a comparative study of different elastic imaging techniques, performed on a 2D OBS acquisition. We experiment three imaging methods to illuminate a given target zone. The first one is a linearized elastic inversion method using a conjugate gradient; the Green’s functions are computed by finite differences.
Gisèle Etienne +2 more
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Determination of elastic properties of latewood and earlywood by digital image analysis technique
Wood Science and Technology, 2019The proportion of latewood varies from species to species and from site to site. To understand the stiffness of wood structures, it is necessary to accurately determine the modulus of elasticity (MOE) of the wood. In this paper, a digital image correlation method was used to analyze the surface strain of wood specimens during tensile testing and ...
Tzu-Yu Kuo, Wei-Chung Wang
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New techniques in the elastic analysis of arch bridges using image processing
Strain, 1996AbstractThe importance of the masonry arch in Britain's infrastructure has never been more significant than at the present time with ever increasing axle loads under new EEC regulations The searches have been shown to be significantly affected by the overlying fill.
D.J. Prentice, D.A. Ponniah
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Homogenization of the elastic properties of pyrolytic carbon based on an image processing technique
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2012AbstractIn this work, the linear elastic material properties of differently textured variants of pyrolytic carbon are homogenized from the submicro‐ to the micro‐scale. In high resolution transmission electron microscope (HRTEM) lattice fringe images, the microstructure of pyrolytic carbon manifests itself in terms of projections of graphene layers ...
Böhlke, T. +3 more
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X-ray scattering in the elastic regime as source for 3D imaging reconstruction technique
Journal of Quantitative Spectroscopy and Radiative Transfer, 2015Abstract X-ray beams propagate across a target object before they are projected onto a regularly spaced array of detectors to produce a routine X-ray image. A 3D attenuation coefficient distribution is obtained by tomographic reconstruction where scattering is usually regarded as a source of parasitic signals which increase the level of ...
Miroslav Kocifaj, Michal Mego
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An Intravascular Ultrasonic Imaging Technique for Measurement of Elastic Properties of the Artery
1993In recent years, intravascular ultrasonic imaging has become important as this technique provides cross-sectional images of the arterial wall. Several in vitro studies1–3 demonstrate good correlation for the lumen or the wall thickness between ultrasound images and histological sections.
Katsuyuki Yamamoto +3 more
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2007 IEEE Ultrasonics Symposium Proceedings, 2007
The frame-rate of ultrasound radio-frequency (RF) data acquisition is critical for imaging of the pulse wave and electromechanical wave propagation in cardiovascular tissues as well as improving the strain estimation. Therefore, an automated method had been developed to overcome the frame-rate limitations on standard systems by retrospective multi ...
S. Wang +3 more
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The frame-rate of ultrasound radio-frequency (RF) data acquisition is critical for imaging of the pulse wave and electromechanical wave propagation in cardiovascular tissues as well as improving the strain estimation. Therefore, an automated method had been developed to overcome the frame-rate limitations on standard systems by retrospective multi ...
S. Wang +3 more
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Low Frequency Imaging Technique for Acoustic and Elastic Waves
1980Radar, active sonar, and ultrasonic pulse-echo nondestructive testing have the common goal of extracting as much information about the target as possible from backscattered signals.
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IEEE Transactions on Geoscience and Remote Sensing, 1990
An automated algorithm for finding the inner boundary based on recently proposed computer vision technique is described. The algorithm is analogous to solving the equations of motion for an elastic curve, where the forces are provided by the image. The resulting equilibrium position of the elastic curve provides an automated method for finding the ...
R. Samadani +5 more
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An automated algorithm for finding the inner boundary based on recently proposed computer vision technique is described. The algorithm is analogous to solving the equations of motion for an elastic curve, where the forces are provided by the image. The resulting equilibrium position of the elastic curve provides an automated method for finding the ...
R. Samadani +5 more
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2012 IEEE International Ultrasonics Symposium, 2012
Multiple push-detect acquisitions are typically required in current acoustic radiation force based shear wave elasticity imaging methods to reconstruct a full FOV elasticity map, which can result in potential motion artifacts and difficulties in studying tissue dynamic mechanical properties. Comb-push Ultrasound Shear Elastography (CUSE) is a novel and
Pengfei Song +5 more
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Multiple push-detect acquisitions are typically required in current acoustic radiation force based shear wave elasticity imaging methods to reconstruct a full FOV elasticity map, which can result in potential motion artifacts and difficulties in studying tissue dynamic mechanical properties. Comb-push Ultrasound Shear Elastography (CUSE) is a novel and
Pengfei Song +5 more
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