Results 71 to 80 of about 5,274,646 (230)
Investigation of the speckle pattern effect for displacement assessments by DIC [PDF]
Journal of Intelligent Manufacturing and Special EquipmentPurpose – This study aims to investigate the effect of speckle pattern on displacement measurements using different speckle diameters and coverage ratios.
Salim Caliskan, Hakan Akyuz
doaj +1 more source
Sensors, 2021 In this study, a compound speckle interferometer for measuring three-degree-of-freedom (3-DOF) displacement is proposed. The system, which combines heterodyne interferometry, speckle interferometry and beam splitting techniques, can perform precision 3 ...
Hung-Lin Hsieh, Bo-Yen Sun
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DeepLSR: a deep learning approach for laser speckle reduction [PDF]
, 2018 Speckle artifacts degrade image quality in virtually all modalities that utilize coherent energy, including optical coherence tomography, reflectance confocal microscopy, ultrasound, and widefield imaging with laser illumination. We present an adversarial deep learning framework for laser speckle reduction, called DeepLSR (https://durr.jhu.edu/DeepLSR),
arxiv +1 more source
Overcoming the speckle correlation limit to achieve a fiber wavemeter with attometer resolution [PDF]
Optics Letters 44, 1367-1370 (2019), 2019 The measurement of the wavelength of light using speckle is a promising tool for the realization of compact and precise wavemeters and spectrometers. However, the resolution of these devices is limited by strong correlations between the speckle patterns produced by closely-spaced wavelengths.
arxiv +1 more source
An Effective Computational Ghost Imaging Based on Noise Estimation and Elimination
IEEE Access, 2020 To improve the quality of ghost image, we propose an efficient computational ghost imaging method in this article. The primary idea is to estimate the noise value of the ghost image by analyzing and eliminating the source of the noise. The innovativeness
Xiaoxia Wang, Jiangtao Xi, Fengbao Yang
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A fiber optic intrusion monitoring system
Moldavian Journal of the Physical Sciences, 2013 A fiber optic intrusion monitoring system comprises a multimode optical fiber, a coherent light source, a CCD, and a processor for generation of the output signal. The system is based on the principle of variation of speckle pattern in the far-field of a
Culeac, Ion +5 more
doaj
Spatial statistics of superposition of two uncorrelated speckle patterns with polarization diversity
Results in Optics, 2021 A detailed theoretical and experimental study on the effect of the superposition of uncorrelated speckle patterns with polarization diversity on the spatial statistics of the superposed speckle pattern is presented.
Abhijit Roy
doaj
Spectral Speckle Customization [PDF]
arXiv, 2023 Speckle patterns are used in a broad range of applications including microscopy, imaging, and light-matter interactions. Tailoring speckles' statistics can dramatically enhance their performance in applications. We present an experimental technique for customizing the spatio-spectral speckled intensity statistics of optical pulses at the output of a ...
arxiv
3D B-mode ultrasound speckle reduction using deep learning for 3D registration applications [PDF]
arXiv, 2020 Ultrasound (US) speckles are granular patterns which can impede image post-processing tasks, such as image segmentation and registration. Conventional filtering approaches are commonly used to remove US speckles, while their main drawback is long run-time in a 3D scenario.
arxiv
Novel 3D measurement system based on speckle and fringe pattern projection.
Optics Express, 2016 An efficient three-dimensional shape measurement system is proposed, which is based on the combining projection of single digital speckle pattern and phase-shifting fringe patterns.
Shaoyan Gai, F. Da, X. Dai
semanticscholar +1 more source