2018
DOI: 10.1016/j.ymssp.2018.02.006
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3D mode shapes characterisation using phase-based motion magnification in large structures using stereoscopic DIC

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Cited by 61 publications
(16 citation statements)
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“…Hence, the algorithm inputs are the image sequence, the desired frequency band, and the magnification factor. For subsequent measurements using 3D-DIC, the sequence from each camera must be magnified using the same parameters [18]. Unlike sinusoidal excitation, many significant modes are now present in the images simultaneously.…”
Section: Image Processingmentioning
confidence: 99%
See 1 more Smart Citation
“…Hence, the algorithm inputs are the image sequence, the desired frequency band, and the magnification factor. For subsequent measurements using 3D-DIC, the sequence from each camera must be magnified using the same parameters [18]. Unlike sinusoidal excitation, many significant modes are now present in the images simultaneously.…”
Section: Image Processingmentioning
confidence: 99%
“…It is only suitable to visualise in-plane motions and, thus, only for 2D displacements. Considering that, the authors evaluated the validity of the measurement on magnified images from a stereoscopic system using 3D-DIC [18]. Under analogous conditions, the obtained ODSs were compared with numerical simulations for a cantilever beam and it was demonstrated that no distortion occurred as a consequence of separate magnification of the images from each camera.…”
Section: Introductionmentioning
confidence: 99%
“…In a review of 3D high-speed DIC for vibration measurement, Beberniss and Ehrhardt [4] pointed to a difficulty at high frequency because of low out-of-plane sensitivity. This was overcome separately by Poozesh et al [5] and Molina-Viedma et al [6] using phase-based motion magnification and results are reported in [7] for 3D operational deflection shapes in the range from 1500 Hz to 6710 Hz without the need for high levels of excitation. Poozesh et al [8] and Patil et al [9] developed methods for the stitching of DIC images of sub-areas of very large structures to obtain complete images of vibration modes.…”
Section: Introductionmentioning
confidence: 99%
“…Recently, the out-of-plane vibrations of cantilever beams were tracked via a new camera technology, namely light field imagers, by Chesebrough et al [ 35 ]. To the best of the authors’ knowledge, studies in three-dimensions with imperceptible motion employing PBMM are currently limited to the use of the 3D-DIC technique [ 36 , 37 ]. Particle tracking velocimetry (PTV) was proposed by the authors as an alternative technique to obtain dynamic displacements for SHM applications, in both 2D [ 38 ] and 3D [ 39 , 40 ], as well as a performance comparison with optical flow [ 19 ].…”
Section: Introductionmentioning
confidence: 99%