Results 41 to 50 of about 142,258 (356)

Speckle tracking approaches in speckle sensing [PDF]

SPIE Proceedings, 2017
This paper reports some initial investigations into the application of feature tracking algorithms as an alternative data processing method for speckle correlation sensors capable of determining both the speckle pattern translation and rotation. The accuracy of translation measurements using the feature tracking approach was found to be similar to that
Charrett, Thomas O. H., Kotowski, Krzysztof, Tatam, Ralph P.   +2 more
openaire   +2 more sources

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

Speckle Noise Reduction Technique for SAR Images Using Statistical Characteristics of Speckle Noise and Discrete Wavelet Transform

Remote Sensing, 2019
Synthetic aperture radar (SAR) images map Earth’s surface at high resolution, regardless of the weather conditions or sunshine phenomena. Therefore, SAR images have applications in various fields.
Hyunho Choi, Jechang Jeong
semanticscholar   +1 more source

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

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

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

Mapping of blood flow and slow speckle tissue dynamics using laser speckle contrast imaging. [PDF]

Biomed Opt Express
Liu B, Tang RP, Long EA, Yaqoob Z, Simkulet MG, Postnov DD, Erdener ŞE, Boas DA, Cheng X.   +8 more
europepmc   +2 more sources

Light source optimization for partially coherent holographic displays with consideration of speckle contrast, resolution, and depth of field

Scientific Reports, 2020
Speckle reduction is an important topic in holographic displays as speckles not only reduce signal-to-noise ratio but also possess an eye-safety issue. Despite thorough exploration of speckle reduction methods using partially coherent light sources, the ...
Seungjae Lee, Dongyeon Kim, Seung-Woo Nam, Byounghyo Lee, Jaebum Cho, Byoun-gkil Lee   +5 more
semanticscholar   +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