Results 51 to 60 of about 132,566 (239)

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

IEEE 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, Saurav Gupta, Biswajit Jena, Ravi Prakash Dwivedi   +3 more
doaj   +1 more source

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

Cardiology 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, Asife Şahinarslan, Burak Sezenöz, Orhan Mecit Uludağ, Gökhan Gökalp, Özden Seçkin, Selim Turgay Arınsoy, Özlem Gülbahar, Nuri Bülent Boyacı   +8 more
doaj   +1 more source

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

Heritage, 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

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, R. Sethunadh., P. M. Ameer   +2 more
doaj   +1 more source

Dynamic Speckle Holography

Physical Review Letters, 2021
We introduce dynamic speckle holography, a new technique that combines imaging and scattering to measure three-dimensional maps of displacements as small as ten nanometers over several centimeters, greatly extending the capabilities of traditional imaging systems.
S. Aime, M. Sabato, L. Xiao, D. A. Weitz   +3 more
openaire   +3 more sources

Superpixel cosegmentation algorithm for synthetic aperture radar image change detection

The Journal of Engineering, 2019
Image segmentation has gained increasing popularity and has been widely applied in various image processing tasks recently. A simple linear iterative clustering (SLIC) superpixel generating algorithm for optical images based on k-means clustering ...
Ningyuan Shao, Huanxin Zou, Cheng Chen, Meilin Li, Jiachi Sun, Xianxiang Qin   +5 more
doaj   +1 more source

Adaptive Speckle Imaging Interferometry: a new technique for the analysis of microstructure dynamics, drying processes and coating formation

, 2007
We describe an extension of multi-speckle diffusing wave spectroscopy adapted to follow the non-stationary microscopic dynamics in drying films and coatings in a very reactive way and with a high dynamic range.
Brun, Alice, Brunel, Laurent, Cipelletti, Luca, Snabre, Patrik   +3 more
core   +2 more sources

Bose-Einstein Condensate in Weak 3d Isotropic Speckle Disorder [PDF]

, 2012
The effect of a weak three-dimensional (3d) isotropic laser speckle disorder on various thermodynamic properties of a dilute Bose gas is considered at zero temperature.
A. Pelster, B. Abdullaev, C. Fort, C. Krumnow, D. Clement, D. Clement, D. Clement, D. Dries, D.J. Boers, F. Jendrzejewski, G. Roati, G.M. Falco, H.A. Makse, J. Billy, J.M. Huntley, K. Huang, L. Landau, L. Leushacke, L. Pezze, L. Sanchez-Palencia, M. Modugno, M. Piraud, M. Robert-de-Saint-Vincent, M.H.W. Chan, M.P.A. Fisher, P.R. Kramer, P.W. Anderson, R.C. Kuhn, S. Giorgini, S. Pilati, S. Pilati, S. Sucu, S.S. Kondov, Y.P. Chen   +33 more
core   +2 more sources

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Methods for Determination of Mean Speckle Size in Simulated Speckle Pattern

Measurement Science Review, 2014
This paper deals with computation of mean speckle size in a speckle pattern generated through a numerical simulation of speckle after reflection of a Gaussian beam off a rough object’s surface. Within this simulation various speckle patterns are obtained
Hamarová I., Šmíd P., Horváth P., Hrabovský M.   +3 more
doaj   +1 more source