Results 11 to 20 of about 66,156 (175)
Sensors, 2018 In this study; an OCT-based intra-operative imaging method for blood flow detection during esophagectomy with gastric tube reconstruction is investigated.
Sanne M. Jansen +9 more
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Speckle reduction in double-pass retinal images using variable-focus lenses [PDF]
Journal of the European Optical Society-Rapid Publications, 2015 Speckle arises in double-pass images when coherent light is scattered by the retina. Since this noise degrades the images that are used to characterize the eye, there is special attention in reducing speckle when working with instruments based on retina ...
García-Guerra C. E. +3 more
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Remote Sensing, 2021 The detection and removal of erroneous pixels is a critical pre-processing step in producing chlorophyll-a (chl-a) concentration values to adequately understand the bio-physical oceanic process using optical satellite data.
Ji-Eun Park, Kyung-Ae Park
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The very compact and efficient speckle suppression device for laser picoprojector
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2019 The original, simple and efficient speckle suppression method has been proposed for laser picoprojector. The method uses simple 1D DOE structure on flexible film roll up in loop for speckle suppression.
I.V. Gorbov
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Optical Energy Variability Induced by Speckle: The Cases of MERLIN and CHARM-F IPDA Lidar
Atmosphere, 2019 In the context of the FrenchGerman space lidar mission MERLIN (MEthane Remote LIdar missioN) dedicated to the determination of the atmospheric methane content, an end-to-end mission simulator is being developed.
Vincent Cassé +4 more
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Speckled speckled speckle [PDF]
, 2020 Speckle is the spatial fluctuation of irradiance seen when coherent light is reflected from a rough surface. It is due to light reflected from the surface's many nooks and crannies accumulating vastly-discrepant time delays, spanning much more than an optical period, en route to an observation point.
arxiv +1 more source
Remote Sensing, 2017 SAR (Synthetic Aperture Radar) raw data simulation has a significant role in the evaluation of newly-proposed methods for the estimation of moving target parameters.
Arash Rahmanizadeh, Jalal Amini
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Circumventing the optical diffraction limit with customized speckles [PDF]
Optica Vol. 8, Issue 2, pp. 122-129 (2021), 2020 Speckle patterns have been widely used in imaging techniques such as ghost imaging, dynamic speckle illumination microscopy, structured illumination microscopy, and photoacoustic fluctuation imaging. Recent advances in the ability to control the statistical properties of speckles has enabled the customization of speckle patterns for specific imaging ...
arxiv +1 more source
Spatially adaptive polarimetric image despeckling using bandelet transform
European Journal of Remote Sensing, 2020 Polarimetric Synthetic Aperture Radar (PolSAR) imaging extended SAR applications by exploring the polarimetric properties of the target scatterers. Similar to SAR images, PolSAR images are prone to multiplicative speckle noise due to its coherent imaging
Roy Thankachan +2 more
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Speckle pattern formation in spatially limited optical systems
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2016 The dependences of statistical parameters inherent to speckle patterns on the object roughness and aperture size have been investigated. The experimental results that confirm theoretical dependence quality within the limits of errors were obtained.
M.M. Kotov
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