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We propose a training and evaluation approach for autoencoder Generative Adversarial Networks (GANs), specifically the Boundary Equilibrium Generative Adversarial Network (BEGAN), based on methods from the image quality assessment…

计算机视觉与模式识别 · 计算机科学 2017-08-09 Michael O. Vertolli , Jim Davies

Because of the necessity to obtain high-quality images with minimal radiation doses, such as in low-field magnetic resonance imaging, super-resolution reconstruction in medical imaging has become more popular (MRI). However, due to the…

图像与视频处理 · 电气工程与系统科学 2022-12-27 Weizhi Du , Harvery Tian

Simulations of the dark matter distribution throughout the Universe are essential in order to analyse data from cosmological surveys. $N$-body simulations are computationally expensive, and many cheaper alternatives (such as lognormal…

宇宙学与河外天体物理 · 物理学 2025-01-07 Prabh Bhambra , Benjamin Joachimi , Ofer Lahav , Davide Piras

We perform a Fisher analysis to estimate the expected constraints on the Epoch of Reionization (EoR) model parameters (i.e., minimum virial temperature, the ionizing efficiency and the mean free path of ionizing photons) taking into account…

宇宙学与河外天体物理 · 物理学 2017-04-04 Hayato Shimabukuro , Shintaro Yoshiura , Keitaro Takahashi , Shuichiro Yokoyama , Kiyotomo Ichiki

Predictions for the ability of 21-cm interferometric experiments to discriminate Epoch of Reionization (EoR) signal models are typically limited by the simplicity of data models, whereby foreground signals and characteristics of the…

宇宙学与河外天体物理 · 物理学 2020-04-29 Ainulnabilah Nasirudin , Steven Murray , Cathryn Trott , Bradley Greig , Ronniy Joseph , Chris Power

Computer-Aided-Diagnosis (CADx) systems assist radiologists with identifying and classifying potentially malignant pulmonary nodules on chest CT scans using morphology and texture-based (radiomic) features. However, radiomic features are…

图像与视频处理 · 电气工程与系统科学 2020-01-27 Leihao Wei , Yannan Lin , William Hsu

Medical image processing has been highlighted as an area where deep learning-based models have the greatest potential. However, in the medical field in particular, problems of data availability and privacy are hampering research progress…

图像与视频处理 · 电气工程与系统科学 2023-10-27 Christoph Angermann , Johannes Bereiter-Payr , Kerstin Stock , Markus Haltmeier , Gerald Degenhart

Currently generative adversarial networks (GANs) are rarely applied to medical images of large sizes, especially 3D volumes, due to their large computational demand. We propose a novel multi-scale patch-based GAN approach to generate large…

图像与视频处理 · 电气工程与系统科学 2019-07-09 Hristina Uzunova , Jan Ehrhardt , Fabian Jacob , Alex Frydrychowicz , Heinz Handels

Translational brain research using Magnetic Resonance Imaging (MRI) is becoming increasingly popular as animal models are an essential part of scientific studies and more ultra-high-field scanners are becoming available. Some disadvantages…

图像与视频处理 · 电气工程与系统科学 2022-01-05 André Ferreira , Ricardo Magalhães , Sébastien Mériaux , Victor Alves

Traditional smart meters, which measure energy usage every 15 minutes or more and report it at least a few hours later, lack the granularity needed for real-time decision-making. To address this practical problem, we introduce a new method…

信号处理 · 电气工程与系统科学 2024-09-04 Hritik Gopal Shah , Behrouz Azimian , Anamitra Pal

The problem of generating textual descriptions for the visual data has gained research attention in the recent years. In contrast to that the problem of generating visual data from textual descriptions is still very challenging, because it…

计算机视觉与模式识别 · 计算机科学 2022-10-11 Bulla Rajesh , Nandakishore Dusa , Mohammed Javed , Shiv Ram Dubey , P. Nagabhushan

In this paper, we introduce a novel data augmentation methodology based on Conditional Progressive Generative Adversarial Networks (CPGAN) to generate diverse black hole (BH) images, accounting for variations in spin and electron…

The 21-cm signal from neutral hydrogen is anticipated to reveal critical insights into the formation of early cosmic structures during the Cosmic Dawn and the subsequent Epoch of Reionization. However, the intrinsic faintness of the signal,…

宇宙学与河外天体物理 · 物理学 2026-05-27 Yuchen Liu , Eloy de Lera Acedo , Peter Sims

The redshifted 21-cm signal of neutral Hydrogen is a promising probe into the period of evolution of our Universe when the first stars were formed (Cosmic Dawn), to the period where the entire Universe changed its state from being…

宇宙学与河外天体物理 · 物理学 2021-01-26 Madhurima Choudhury , Atrideb Chatterjee , Abhirup Datta , Tirthankar Roy Choudhury

The redshifted 21-cm line of distant neutral H atoms provides a probe of the cosmic ``dark ages'' and the epoch of reionization (``EOR'') which ended them. The radio continuum produced by this redshifted line can be seen in absorption or…

天体物理学 · 物理学 2009-11-13 Paul R. Shapiro , Ilian T. Iliev , Garrelt Mellema , Ue-Li Pen , Hugh Merz

We present a novel conditional Generative Adversarial Network (cGAN) architecture that is capable of generating 3D Computed Tomography scans in voxels from noisy and/or pixelated approximations and with the potential to generate full…

We present new constraints on the 21cm Epoch of Reionization (EoR) power spectrum derived from 3 months of observing with a 32-antenna, dual-polarization deployment of the Donald C. Backer Precision Array for Probing the Epoch of…

We study the observability of the reionization epoch through the 21 cm hyperfine transition of neutral hydrogen. We use a high-resolution cosmological simulation (including hydrodynamics) together with a fast radiative transfer algorithm to…

天体物理学 · 物理学 2009-11-07 Steven Furlanetto , Aaron Sokasian , Lars Hernquist

Dark matter in the universe evolves through gravity to form a complex network of halos, filaments, sheets and voids, that is known as the cosmic web. Computational models of the underlying physical processes, such as classical N-body…

Medical image synthesis has gained a great focus recently, especially after the introduction of Generative Adversarial Networks (GANs). GANs have been used widely to provide anatomically-plausible and diverse samples for augmentation and…

图像与视频处理 · 电气工程与系统科学 2020-02-07 Basel Alyafi , Oliver Diaz , Joan C Vilanova , Javier del Riego , Robert Marti