Results 41 to 50 of about 85,035 (307)

Laser Speckle Photometry - an advanced method for defect detection in ceramics

open access: yes, 2022
Paper 1083415, 7 S.Due to the special structural and functional properties, the advanced ceramic technology plays an important role in many areas of the industry. Fraunhofer IKTS develops novel ceramic materials for industrial applications, e.g.
Cikalova, Ulana   +2 more
core   +1 more source

Optical Energy Variability Induced by Speckle: The Cases of MERLIN and CHARM-F IPDA Lidar

open access: yesAtmosphere, 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
doaj   +1 more source

Scruples over speckles

open access: yesJournal of Medical Ultrasound, 2020
The "snowstorm" sign refers to the ultrasound appearance of motile hyperechoic specks within synovial fluid and has been reported to have a high specificity for gout. We describe three additional etiologies commonly encountered in the rheumatology clinic that can produce a snowstorm: calcium pyrophosphate deposition disease, fibrin collections/rice ...
Benjamin Persons, Eugene Y Kissin
openaire   +3 more sources

Employing a Mixture of Rayleigh and Inverse Gaussian Distributions as SAR Clutter Texture Model in MAP Estimation for Efficient Speckle Suppression

open access: yesIEEE Access
This article proposes a speckle suppression technique based on a binary mixture of the Rayleigh and the reciprocal of Gaussian (RIG) distributions. This model suitably characterizes the texture of synthetic aperture radar (SAR) return from regions with ...
Dheeren Ku Mahapatra   +3 more
doaj   +1 more source

Photon-Counting Security Tagging and Verification Using Optically Encoded QR Codes

open access: yesIEEE Photonics Journal, 2014
We propose an optical security method for object authentication using photon-counting encryption implemented with phase encoded QR codes. By combining the full phase double-random-phase encryption with photon-counting imaging method and applying an ...
A. Markman, B. Javidi, M. Tehranipoor
doaj   +1 more source

Speckle-correlation imaging through a kaleidoscopic multimode fiber

open access: yes, 2022
Speckle-correlation imaging techniques are widely used for non-invasive imaging through complex scattering media. While light propagation through multimode fibers and scattering media share many analogies, reconstructing images through multimode fibers ...
Irène Wang (9537569)   +5 more
core   +1 more source

Spatially adaptive polarimetric image despeckling using bandelet transform

open access: yesEuropean 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
doaj   +1 more source

High-sensitive troponin T increase after hemodialysis is associated with left ventricular global longitudinal strain and ultrafiltration rate

open access: yesCardiology Journal, 2020
BACKGROUND: Circulating troponin levels are both stable and higher in patients with end-stage renal disease, even in the absence of acute coronary syndrome. These patients commonly have underlying cardiac problems that frequently cause troponin elevation.
Serkan Ünlü   +8 more
doaj   +1 more source

Interferometric Quantification of the Impact of Relative Humidity Variations on Cultural Heritage

open access: yesHeritage, 2022
It has been shown that Relative Humidity (RH) provokes dimensional displacement detectable directly from surfaces using holographic interferometry.
Vivi Tornari
doaj   +1 more source

Speckle-scanning ptychographic lensless imaging

open access: yes, 2019
Operation of the speckle-scanning ptychographic lensless imaging platform -- Smart Imaging Lab @ UConnHe Zhang, Zichao Bian, Shaowei Jiang, Jian Liu, Pengming Song, and Guoan Zheng, "Field-portable quantitative lensless microscopy based on translated ...
Guoan Zheng (4764957)
core   +1 more source

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