55 citations · 184 across the 13 of their papers we have counts for
7 papers · 1 filter
Exploiting the Dual-Tree Complex Wavelet Transform for Ship Wake Detection in SAR Imagery
Wanli Ma, Alin Achim, Oktay Karakuş
In this paper, we analyse synthetic aperture radar (SAR) images of the sea surface using an inverse problem formulation whereby Radon domain information is enhanced in order to acc…
A Simulation Study to Evaluate the Performance of the Cauchy Proximal Operator in Despeckling SAR Images of the Sea Surface
Oktay Karakuş, Igor Rizaev, Alin Achim
The analysis of ocean surface is widely performed using synthetic aperture radar (SAR) imagery as it yields information for wide areas under challenging weather conditions, during…
On Solving SAR Imaging Inverse Problems Using Non-Convex Regularization with a Cauchy-based Penalty
Oktay Karakuş, Alin Achim
Synthetic aperture radar (SAR) imagery can provide useful information in a multitude of applications, including climate change, environmental monitoring, meteorology, high dimensio…
A Generalized Gaussian Extension to the Rician Distribution for SAR Image Modeling
Oktay Karakuş, Ercan E. Kuruoglu, Alin Achim
In this paper, we present a novel statistical model, (GG-Rician) distribution, for the characterization of synthetic aperture radar (SAR)…
Detection of Line Artefacts in Lung Ultrasound Images of COVID-19 Patients via Non-Convex Regularization
Oktay Karakuş, Nantheera Anantrasirichai, Amazigh Aguersif +3
In this paper, we present a novel method for line artefacts quantification in lung ultrasound (LUS) images of COVID-19 patients. We formulate this as a non-convex regularisation pr…
Convergence Guarantees for Non-Convex Optimisation with Cauchy-Based Penalties
Oktay Karakus, Perla Mayo, Alin Achim
In this paper, we propose a proximal splitting methodology with a non-convex penalty function based on the heavy-tailed Cauchy distribution. We first suggest a closed-form expressi…