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In this paper, we present a Generative Adversarial Network (GAN) machine learning model to interpolate irregularly distributed measurements across the spatial domain to construct a smooth radio frequency map (RFMap) and then perform…

Machine Learning · Computer Science 2021-11-25 Kuldeep S. Gill , Son Nguyen , Myo M. Thein , Alexander M. Wyglinski

Radio-Frequency (RF) imaging concerns the digital recreation of the surfaces of scene objects based on the scattered field at distributed receivers. To solve this difficult inverse scattering problems, data-driven methods are often employed…

Machine Learning · Computer Science 2025-03-19 Kyriakos Stylianopoulos , Panagiotis Gavriilidis , Gabriele Gradoni , George C. Alexandropoulos

Learning a good image prior is a long-term goal for image restoration and manipulation. While existing methods like deep image prior (DIP) capture low-level image statistics, there are still gaps toward an image prior that captures rich…

Image and Video Processing · Electrical Eng. & Systems 2020-07-21 Xingang Pan , Xiaohang Zhan , Bo Dai , Dahua Lin , Chen Change Loy , Ping Luo

Despite the success of Generative Adversarial Networks (GANs) in image synthesis, applying trained GAN models to real image processing remains challenging. Previous methods typically invert a target image back to the latent space either by…

Computer Vision and Pattern Recognition · Computer Science 2020-04-01 Jinjin Gu , Yujun Shen , Bolei Zhou

The vulnerability of Deep Neural Networks to adversarial perturbations presents significant security concerns, as the imperceptible perturbations can contaminate the feature space and lead to incorrect predictions. Recent studies have…

Computer Vision and Pattern Recognition · Computer Science 2024-06-18 Kejia Zhang , Juanjuan Weng , Junwei Wu , Guoqing Yang , Shaozi Li , Zhiming Luo

The reconstruction of X-rays CT images from sparse or limited-angle geometries is a highly challenging task. The lack of data typically results in artifacts in the reconstructed image and may even lead to object distortions. For this…

Computer Vision and Pattern Recognition · Computer Science 2026-02-12 Davide Evangelista , Pasquale Cascarano , Elena Loli Piccolomini

Generative Adversarial Networks (GAN) have attracted much research attention recently, leading to impressive results for natural image generation. However, to date little success was observed in using GAN generated images for improving…

Computer Vision and Pattern Recognition · Computer Science 2017-11-15 Xinlong Wang , Zhipeng Man , Mingyu You , Chunhua Shen

We present a learned image compression system based on GANs, operating at extremely low bitrates. Our proposed framework combines an encoder, decoder/generator and a multi-scale discriminator, which we train jointly for a generative learned…

Computer Vision and Pattern Recognition · Computer Science 2019-08-20 Eirikur Agustsson , Michael Tschannen , Fabian Mentzer , Radu Timofte , Luc Van Gool

Inverse scattering problems are inherently challenging, given the fact they are ill-posed and nonlinear. This paper presents a powerful deep learning-based approach that relies on generative adversarial networks to accurately and…

Image and Video Processing · Electrical Eng. & Systems 2024-02-19 Ehtasham Naseer , Ali Imran Sandhu , Muhammad Adnan Siddique , Waqas W. Ahmed , Mohamed Farhat , Ying Wu

Radio Environment Maps (REMs) are crucial for numerous applications in Telecom. The construction of accurate Radio Environment Maps (REMs) has become an important and challenging topic in recent decades. In this paper, we present a method…

Networking and Internet Architecture · Computer Science 2024-07-11 Ali Shibli , Tahar Zanouda

Compensating scarce measurements by inferring them from computational models is a way to address ill-posed inverse problems. We tackle Limited Angle Tomography by completing the set of acquisitions using a generative model and…

Image and Video Processing · Electrical Eng. & Systems 2022-02-02 Emilien Valat , Katayoun Farrahi , Thomas Blumensath

Limited-angle computed tomography (CT) image reconstruction is a challenging reconstruction problem in the fields of CT. With the development of deep learning, the generative adversarial network (GAN) perform well in image restoration by…

Medical Physics · Physics 2019-03-12 Ziheng Li , Wenkun Zhang , Linyuan Wang , Ailong Cai , Ningning Liang , Bin Yan , Lei Li

Generating images from graph-structured inputs, such as scene graphs, is uniquely challenging due to the difficulty of aligning nodes and connections in graphs with objects and their relations in images. Most existing methods address this…

Computer Vision and Pattern Recognition · Computer Science 2022-11-22 Ling Yang , Zhilin Huang , Yang Song , Shenda Hong , Guohao Li , Wentao Zhang , Bin Cui , Bernard Ghanem , Ming-Hsuan Yang

Inferring model parameters from experimental data is a grand challenge in many sciences, including cosmology. This often relies critically on high fidelity numerical simulations, which are prohibitively computationally expensive. The…

Instrumentation and Methods for Astrophysics · Physics 2019-05-23 Mustafa Mustafa , Deborah Bard , Wahid Bhimji , Zarija Lukić , Rami Al-Rfou , Jan M. Kratochvil

As sixth generation (6G) wireless networks evolve, accurate signal-to-interference-noise ratio (SINR) maps are becoming increasingly critical for effective resource management and optimization. However, acquiring such maps at high…

To characterize radio frequency (RF) signal power distribution in wireless communication systems, the radiomap is a useful tool for resource allocation and network management. Usually, a dense radiomap is reconstructed from sparse…

Signal Processing · Electrical Eng. & Systems 2025-02-26 Yueling Zhou , Achintha Wijesinghe , Yibo Ma , Songyang Zhang , Zhi Ding

Next-generation cosmic microwave background (CMB) surveys are expected to provide valuable information about the primordial universe by creating maps of the mass along the line of sight. Traditional tools for creating these lensing…

Cosmology and Nongalactic Astrophysics · Physics 2022-05-17 Peikai Li , Ipek Ilayda Onur , Scott Dodelson , Shreyas Chaudhari

Convolutional neural networks have been successfully applied to semantic segmentation problems. However, there are many problems that are inherently not pixel-wise classification problems but are nevertheless frequently formulated as…

Computer Vision and Pattern Recognition · Computer Science 2018-07-06 Mohsen Ghafoorian , Cedric Nugteren , Nóra Baka , Olaf Booij , Michael Hofmann

Radio map construction based on extensive measurements is accurate but expensive and time-consuming, while environment-aware radio map estimation reduces the costs at the expense of low accuracy. Considering accuracy and costs, a…

Signal Processing · Electrical Eng. & Systems 2024-10-25 Yifan Wang , Shu Sun , Na Liu , Lianming Xu , Li Wang

Understanding the spatial and temporal patterns of environmental exposure to radio-frequency electromagnetic fields (RF-EMF) is essential for conducting risk assessments. These assessments aim to explore potential connections between RF-EMF…

Signal Processing · Electrical Eng. & Systems 2025-04-14 Mohammed Mallik , Laurent Clavier , Davy P. Gaillot
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