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The field of steganography has long been focused on developing methods to securely embed information within various digital media while ensuring imperceptibility and robustness. However, the growing sophistication of detection tools and the…

Cryptography and Security · Computer Science 2024-12-03 Waheed Rehman

As the success of Generative Adversarial Networks (GANs) on natural images quickly propels them into various real-life applications across different domains, it becomes more and more important to clearly understand their limitations.…

Machine Learning · Computer Science 2020-12-21 Mahyar Khayatkhoei , Ahmed Elgammal

The performance of facial super-resolution methods relies on their ability to recover facial structures and salient features effectively. Even though the convolutional neural network and generative adversarial network-based methods deliver…

Computer Vision and Pattern Recognition · Computer Science 2021-11-23 Abhishek Srivastava , Sukalpa Chanda , Umapada Pal

Spectral images captured by satellites and radio-telescopes are analyzed to obtain information about geological compositions distributions, distant asters as well as undersea terrain. Spectral images usually contain tens to hundreds of…

Computer Vision and Pattern Recognition · Computer Science 2018-02-08 Siyu Chen , Danping Liao , Yuntao Qian

We present detailed and comprehensive data reduction and point-spread-function (PSF) model construction for all public JWST NIRCam imaging data from the COSMOS-Web treasury program (up to June 2023, totaling 0.28 ${\rm deg}^2$). We show…

Astrophysics of Galaxies · Physics 2023-09-08 Ming-Yang Zhuang , Junyao Li , Yue Shen

We have performed HST imaging of a sample of 23 high-redshift (1.8<z<2.75) AGN, drawn from the COMBO-17 survey. The sample contains moderately luminous quasars (M_B ~ -23). The data are part of the GEMS imaging survey that provides high…

We present a new iterative deblending method to separate the host galaxy (HG) and their Active Galactic Nuclei (AGN) emission with the use of Integral Field spectroscopic (IFS) data. The method decomposes the resolved HG emission from the…

Anomaly detection in time-series data is a critical challenge with significant implications for network security. Recent quantum machine learning approaches, such as quantum kernel methods and variational quantum circuits, have shown…

Machine Learning · Computer Science 2025-10-31 Wajdi Hammami , Soumaya Cherkaoui , Jean-Frederic Laprade , Ola Ahmad , Shengrui Wang

Training a neural network for pixel based classification task using low resolution Landsat images is difficult as the size of the training data is usually small due to less number of available pixels that represent a single class without…

Computer Vision and Pattern Recognition · Computer Science 2025-02-03 Amritendu Mukherjee , Dipanwita Sinha Mukherjee , Parthasarathy Ramachandran

The problem of anomaly detection in astronomical surveys is becoming increasingly important as data sets grow in size. We present the results of an unsupervised anomaly detection method using a Wasserstein generative adversarial network…

Generative adversarial networks (GANs) are neural networks that learn data distributions through adversarial training. In intensive studies, recent GANs have shown promising results for reproducing training images. However, in spite of…

Computer Vision and Pattern Recognition · Computer Science 2020-04-01 Takuhiro Kaneko , Tatsuya Harada

We present a machine-learning framework to accurately characterize morphologies of Active Galactic Nucleus (AGN) host galaxies within $z<1$. We first use PSFGAN to decouple host galaxy light from the central point source, then we invoke the…

We present a detailed analysis of the point spread function (PSF) of JWST NIRCam imaging in eight filters: F070W, F115W, F150W, F200W, F277W, F356W, F444W, and F480M, using publicly available data. Spatial variations in the PSF FWHM…

Astrophysics of Galaxies · Physics 2023-04-28 Ming-Yang Zhuang , Yue Shen

We demonstrate training of a Generative Adversarial Network (GAN) for prediction of optical property maps (scattering and absorption) using spatial frequency domain imaging (SFDI) image data sets generated synthetically with free…

Image and Video Processing · Electrical Eng. & Systems 2022-10-04 Ahmed Osman , Jane Crowley , George Gordon

Generative adversarial networks have achieved remarkable performance on various tasks but suffer from training instability. Despite many training strategies proposed to improve training stability, this issue remains as a challenge. In this…

Computer Vision and Pattern Recognition · Computer Science 2020-11-17 Faqiang Liu , Mingkun Xu , Guoqi Li , Jing Pei , Luping Shi , Rong Zhao

Data compression techniques focused on information preservation have become essential in the modern era of big data. In this work, an encoder-decoder architecture has been designed, where adversarial training, a modification of the…

Instrumentation and Methods for Astrophysics · Physics 2024-11-12 Raúl Santoveña , Carlos Dafonte , Minia Manteiga

Generative adversarial networks (GANs) are machine learning models that are used to estimate the underlying statistical structure of a given dataset and as a result can be used for a variety of tasks such as image generation or anomaly…

Computer Vision and Pattern Recognition · Computer Science 2024-06-10 Shakhnaz Akhmedova , Nils Körber

With Aperture synthesis (AS) technique, a number of small antennas can assemble to form a large telescope which spatial resolution is determined by the distance of two farthest antennas instead of the diameter of a single-dish antenna.…

Solar and Stellar Astrophysics · Physics 2020-12-02 Long Xu , Wenqing Sun , Yihua Yan , Weiqiang Zhang

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…

Cosmology and Nongalactic Astrophysics · Physics 2018-11-30 Andres C. Rodriguez , Tomasz Kacprzak , Aurelien Lucchi , Adam Amara , Raphael Sgier , Janis Fluri , Thomas Hofmann , Alexandre Réfrégier

This paper introduces a novel approach for unsupervised object co-localization using Generative Adversarial Networks (GANs). GAN is a powerful tool that can implicitly learn unknown data distributions in an unsupervised manner. From the…

Computer Vision and Pattern Recognition · Computer Science 2018-07-10 Junsuk Choe , Joo Hyun Park , Hyunjung Shim