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The measurement of depth motion by speckle photography
- https://www.sciencedirect.com/science/article/pii/0030401876901760
- We propose three methods for measuring the depth motion (i.e., motion in line-of-sight, not lateral) of bodies with a rough surface by multi-exposure …
The measurement of depth motion by speckle photography
- https://www.sciencedirect.com/science/article/abs/pii/0030401876901760
- We propose three methods for measuring the depth motion (i.e., motion in line-of-sight, not lateral) of bodies with a rough surface by multi-exposure speckle photography. The speckle photographs are processed optically (autocorrelation). The output is a depth-versus-time graph. Two of the three proposed methods have been verified experimentally.
The measurement of depth motion by speckle photography
- https://www.semanticscholar.org/paper/The-measurement-of-depth-motion-by-speckle-Lohmann-Weigelt/fff3ba018585a424e67b180c8adeaf3a03c0ea04
- Abstract We propose three methods for measuring the depth motion (i.e., motion in line-of-sight, not lateral) of bodies with a rough surface by multi-exposure speckle photography. The speckle photographs are processed optically (autocorrelation). The output is a depth-versus-time graph.
The measurement of depth motion by speckle …
- https://ui.adsabs.harvard.edu/abs/1976OptCo..17...47L/abstract
- We propose three methods for measuring the depth motion (i.e., motion in line-of-sight, not lateral) of bodies with a rough surface by multi-exposure speckle photography. The speckle photographs are processed optically (autocorrelation). The output is a depth-versus-time graph. Two of the three proposed methods have been verified experimentally.
The measurement of motion trajectories by speckle …
- https://www.semanticscholar.org/paper/The-measurement-of-motion-trajectories-by-speckle-Lohmann-Weigelt/6b822238d5cebc696948ae95a8a06050ea250e12
- Abstract We present a method for studying the lateral motion of a body with a rough surface. A speckle photograph of the moving body is recorded in addition to a still photograph of the same body. The total photograph is then optically Fourier transformed and recorded. Yet another optical Fourier transform yields a display of the motion path (‘trajectory’) of the moving body.
Depth measurement of a blood flow region based on …
- https://link.springer.com/article/10.1007/s10043-015-0039-z
- After that, Yokoi et al. described a method for depth-resolved imaging of an object motion behind a scattering medium using low-coherence speckle interferometry (LSI), which combines a speckle-differentiating technique with low-coherence interferometry . In this method, the LSI is utilized for enhancing the contrast of speckles produced by the moving object …
Quantitative, depth-resolved determination of particle …
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3862160/
- Here the speckle contrast image at f = 0 mm−1is shown, and Region of Interest (ROI) highlighted in a portion of the image expected to be homogenous. Mean speckle contrast in this ROI is calculated for f = 0 mm−1and f = 0.12 mm−1,and compared with measurements made on a truly homogenous sample with no tube present.
Applied Sciences | Free Full-Text | In-Process …
- https://www.mdpi.com/2076-3417/11/11/4981/htm
- Speckle photography is suitable for this in-process measurement task and is already used in a variety of ways for in-plane deformation measurements. The shortcoming of this fast and robust measurement technique based on image correlation techniques is that out-of-plane deformations in the direction of the measurement system cannot be detected and …
Single-Shot Colored Speckle Pattern for High Accuracy …
- https://ieeexplore.ieee.org/abstract/document/8713515/
- Structured light techniques are widely used in the depth measurement. In this paper, we propose a colored speckle method for high-accuracy depth sensing. The projected pattern is a composite of the discrete phase information and the colored De Bruijn sequence information, which can prove the feasibility, in practice, and the robustness to the environment. …
Measurement of motion paths - NASA/ADS
- https://ui.adsabs.harvard.edu/abs/1978spme.book..159W/abstract
- They can easily be used for contactless motion measurements because they follow the rough object in its motion. For measurement of lateral motions, the methods discussed include speckle photography and holographic speckle photography. For measurement of depth motions, they are the oblique observation method, the degree of correlation method, and the very large depth …
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