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The sparse layouts of radio interferometers result in an incomplete sampling of the sky in Fourier space which leads to artifacts in the reconstructed images. Cleaning these systematic effects is essential for the scientific use of…

Instrumentation and Methods for Astrophysics · Physics 2023-07-27 Kevin Schmidt , Felix Geyer , Stefan Fröse , Paul-Simon Blomenkamp , Marcus Brüggen , Francesco de Gasperin , Dominik Elsässer , Wolfgang Rhode

Low-light image enhancement (LLIE) aims to improve the illuminance of images due to insufficient light exposure. Recently, various lightweight learning-based LLIE methods have been proposed to handle the challenges of unfavorable prevailing…

Computer Vision and Pattern Recognition · Computer Science 2023-05-24 Yuantong Zhang , Baoxin Teng , Daiqin Yang , Zhenzhong Chen , Haichuan Ma , Gang Li , Wenpeng Ding

Image restoration, including image denoising, super resolution, inpainting, and so on, is a well-studied problem in computer vision and image processing, as well as a test bed for low-level image modeling algorithms. In this work, we…

Computer Vision and Pattern Recognition · Computer Science 2016-08-31 Xiao-Jiao Mao , Chunhua Shen , Yu-Bin Yang

Federated learning is a specific distributed learning paradigm in which a central server aggregates updates from multiple clients' local models, thereby enabling the server to learn without requiring clients to upload their private data,…

Computer Vision and Pattern Recognition · Computer Science 2024-11-26 Yuchen He , Xiangfeng Wang

Fourier single-pixel imaging (FSI) is a branch of single-pixel imaging techniques. It uses Fourier basis patterns as structured patterns for spatial information acquisition in the Fourier domain. However, the spatial resolution of the image…

Image and Video Processing · Electrical Eng. & Systems 2021-08-06 Ziheng Qiu , Xinyi Guo , Tianao Lu , Pan Qi , Zibang Zhang , Jingang Zhong

Current state-of-the-art generative approaches frequently rely on a two-stage training procedure, where an autoencoder (often a VAE) first performs dimensionality reduction, followed by training a generative model on the learned latent…

Machine Learning · Statistics 2025-07-15 Gianluigi Silvestri , Luca Ambrogioni

Cross-modal retrieval has drawn much attention in both computer vision and natural language processing domains. With the development of convolutional and recurrent neural networks, the bottleneck of retrieval across image-text modalities is…

Computer Vision and Pattern Recognition · Computer Science 2022-07-14 Jianan Chen , Lu Zhang , Qiong Wang , Cong Bai , Kidiyo Kpalma

Aliasing refers to the phenomenon that high frequency signals degenerate into completely different ones after sampling. It arises as a problem in the context of deep learning as downsampling layers are widely adopted in deep architectures…

Computer Vision and Pattern Recognition · Computer Science 2020-08-24 Xueyan Zou , Fanyi Xiao , Zhiding Yu , Yong Jae Lee

When applying the foreground removal methods to uncover the faint cosmological signal from the epoch of reionization (EoR), the foreground spectra are assumed to be smooth. However, this assumption can be seriously violated in practice…

Instrumentation and Methods for Astrophysics · Physics 2019-03-15 Weitian Li , Haiguang Xu , Zhixian Ma , Ruimin Zhu , Dan Hu , Zhenghao Zhu , Junhua Gu , Chenxi Shan , Jie Zhu , Xiang-Ping Wu

With the increasing number of deep multi-wavelength galaxy surveys, the spectral energy distribution (SED) of galaxies has become an invaluable tool for studying the formation of their structures and their evolution. In this context,…

Instrumentation and Methods for Astrophysics · Physics 2017-07-12 Joana Frontera-Pons , Florent Sureau , Jerome Bobin , Emeric Le Floc'h

The restoration of images affected by blur and noise has been widely studied and has broad potential for applications including in medical imaging modalities like computed tomography (CT). Although the blur and noise in CT images can be…

Medical Physics · Physics 2024-07-23 Yijie Yuan , Grace J. Gang , J. Webster Stayman

In this paper, we propose a novel, effective and simpler end-to-end image clustering auto-encoder algorithm: ICAE. The algorithm uses PEDCC (Predefined Evenly-Distributed Class Centroids) as the clustering centers, which ensures the…

Computer Vision and Pattern Recognition · Computer Science 2021-08-24 Qiuyu Zhu , Zhengyong Wang

Shape illustration images (SIIs) are common and important in describing the cross-sections of industrial products. Same as MNIST, the handwritten digit images, SIIs are gray or binary and containing shapes that are surrounded by large areas…

Image and Video Processing · Electrical Eng. & Systems 2020-02-07 Qianwei Zhou , Peng Tao , Xiaoxin Li , Shengyong Chen , Fan Zhang , Haigen Hu

Light field (LF) images acquired by hand-held devices usually suffer from low spatial resolution as the limited detector resolution has to be shared with the angular dimension. LF spatial super-resolution (SR) thus becomes an indispensable…

Image and Video Processing · Electrical Eng. & Systems 2021-10-11 Jing Jin , Junhui Hou , Zhiyu Zhu , Jie Chen , Sam Kwong

In the realm of industrial manufacturing, product inspection remains a significant bottleneck, with only a small fraction of manufactured items undergoing inspection for surface defects. Advances in imaging systems and AI can allow…

Image and Video Processing · Electrical Eng. & Systems 2023-12-05 Tapan Ganatma Nakkina , Adithyaa Karthikeyan , Yuhao Zhong , Ceyhun Eksin , Satish T. S. Bukkapatnam

Self-supervised learning guided by masked image modelling, such as Masked AutoEncoder (MAE), has attracted wide attention for pretraining vision transformers in remote sensing. However, MAE tends to excessively focus on pixel details,…

Computer Vision and Pattern Recognition · Computer Science 2023-10-31 Yi Wang , Hugo Hernández Hernández , Conrad M Albrecht , Xiao Xiang Zhu

The underlying dynamics and patterns of 3D surface meshes deforming over time can be discovered by unsupervised learning, especially autoencoders, which calculate low-dimensional embeddings of the surfaces. To study the deformation patterns…

Computer Vision and Pattern Recognition · Computer Science 2022-12-13 Sara Hahner , Felix Kerkhoff , Jochen Garcke

Lesion images are frequently taken in open-set settings. Because of this, the image data generated is extremely varied in nature.It is difficult for a convolutional neural network to find proper features and generalise well, as a result…

Computer Vision and Pattern Recognition · Computer Science 2021-10-14 Priyam Mehta

For classification, neural networks typically learn by minimizing cross-entropy, but are evaluated and compared using accuracy. This disparity suggests neural loss function search (NLFS), the search for a drop-in replacement loss function…

Computer Vision and Pattern Recognition · Computer Science 2024-03-15 Brandon Morgan , Dean Hougen

In order to obtain morphological information of unlabeled galaxies, we present an unsupervised machine-learning (UML) method for morphological classification of galaxies, which can be summarized as two aspects: (1) the methodology of…

Astrophysics of Galaxies · Physics 2022-02-02 C. C. Zhou , Y. Z. Gu , G. W. Fang , Z. S. Lin