Results 21 to 30 of about 61,457 (342)
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
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Semiclassical theory of speckle correlations [PDF]
, 2013 Coherent wave propagation in random media results in a characteristic speckle pattern, with spatial intensity correlations with short-range and long-range behavior. Here, we show how the speckle correlation function can be obtained from a ray picture for
Breitkreiz, Maxim, Brouwer, Piet W.
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All Optical Speckle Contrast-Based Vibration Sensor for Photoacoustic Signal Detection
Sensors, 2022 Remote detection of photoacoustic signals is a well desired ability, enabling to perform advanced imaging in scenarios where contact is not possible. Various unique solutions have been suggested, including a camera-based speckle contrast photoacoustic ...
Matan Benyamin, Zeev Zalevsky
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Twist-Related Speckle Variation in Graded-Index Multimode Fiber
IEEE Photonics Journal, 2018 We theoretically investigate a twist-related speckle variation in a graded-index multimode fiber. The simulation results show that by increasing the offset splicing distance between a single-mode fiber and a multimode fiber, the speckle pattern tends to ...
Hongye Li +4 more
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Statistical Region Based Segmentation of Ultrasound Images [PDF]
, 2008 Segmentation of ultrasound images is a challenging problem due to speckle, which corrupts the image and can result in weak or missing image boundaries, poor signal to noise ratio, and diminished contrast resolution.
Ayed +30 more
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A new simulation method for laser speckle imaging to investigate hemodynamics [PDF]
E3S Web of Conferences, 2019 Speckle simulation is a powerful protocol to investigate the properties of speckle and evaluate image processing method. However, only static speckle images can be simulated by available methods without considering time-integrated effect of CCD.
Sang X, Li D, Chen B
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IEEE Photonics Journal, 2019 Target tracking and imaging through scattering media are challenges that must be overcome for important applications in various fields. The fundamental problem is the randomly diffused light in scattering media that prevents the formation of diffraction ...
Yingbo Wang +5 more
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Surface characterization of biodegradable nanocomposites by dynamic speckle analysis
Applied Surface Science Advances, 2023 Starch/kefiran/ZnO nanocomposite films may exhibit different physicochemical properties depending on the distribution of ZnO nanoparticles. As a result of UV exposure, the hydrophobicity of the nanoparticles may be modified, resulting in their dispersion
Ramin Jamali +5 more
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Speckle pattern optimization for DIC technologies
Acta Technica Jaurinensis, 2021 This paper contains the relation between speckle pattern and Digital Image Correlation (DIC). The most important advance in experimental mechanics has been DIC since the strain gage. The deformation (strain) of an object can be visualized by DIC.
Szabolcs Szalai, Gábor Dogossy
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Effect of Phase Relations on Speckle Pattern: Simulation and Measurement
IEEE Photonics Journal, 2019 Speckle is an important phenomenon in various applications. It can be quantified by speckle contrast. However, at present, the influence of the phase relations among the various wavelengths on speckle contrast is rarely analyzed theoretically.
Linlu He +5 more
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