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Synthetic Aperture Vector Flow Imaging (SA-VFI) can visualize complex cardiac and vascular blood flow patterns at high temporal resolution with a large field of view. Convolutional neural networks (CNNs) are commonly used in image and video…

Computer Vision and Pattern Recognition · Computer Science 2019-03-18 Thomas Robins , Antonio Stanziola , Kai Reimer , Peter Weinberg , Meng-Xing Tang

To detect anomalies in real-world graphs, such as social, email, and financial networks, various approaches have been developed. While they typically assume static input graphs, most real-world graphs grow over time, naturally represented…

Machine Learning · Computer Science 2024-07-26 Jongha Lee , Sunwoo Kim , Kijung Shin

Active galactic nuclei (AGN) are supermassive black holes with luminous accretion disks found in some galaxies, and are thought to play an important role in galaxy evolution. However, traditional optical spectroscopy for identifying AGN…

Astrophysics of Galaxies · Physics 2022-12-16 Ziting Guo , John F. Wu , Chelsea E. Sharon

This research addresses the challenge of characterizing the complexity and unpredictability of basins within various dynamical systems. The main focus is on demonstrating the efficiency of convolutional neural networks (CNNs) in this field.…

Machine Learning · Computer Science 2024-06-18 David Valle , Alexandre Wagemakers , Miguel A. F. Sanjuán

This study introduces a method for efficiently detecting objects within 3D point clouds using convolutional neural networks (CNNs). Our approach adopts a unique feature-centric voting mechanism to construct convolutional layers that…

Computer Vision and Pattern Recognition · Computer Science 2024-12-05 Tianyi Lyu , Dian Gu , Peiyuan Chen , Yaoting Jiang , Zhenhong Zhang , Huadong Pang , Li Zhou , Yiping Dong

We present a self-supervised approach for characterizing low surface brightness tidal features in wide-field imaging data by applying the nearest-neighbor contrastive learning of visual representations (NNCLR) algorithm to a curated subset…

Astrophysics of Galaxies · Physics 2026-02-02 Ernesto Benitez-Walz , Jelle Mes , Juan Miró-Carretero , Koen Kuijken , Amina Helmi

Lacunes of presumed vascular origin (lacunes) are associated with an increased risk of stroke, gait impairment, and dementia and are a primary imaging feature of the small vessel disease. Quantification of lacunes may be of great importance…

Hyperspectral anomaly detection (HAD) aims to localize pixel points whose spectral features differ from the background. HAD is essential in scenarios of unknown or camouflaged target features, such as water quality monitoring, crop growth…

Computer Vision and Pattern Recognition · Computer Science 2024-01-03 Jitao Ma , Weiying Xie , Yunsong Li

Sparse optical flow is widely used in various computer vision tasks, however assuming brightness consistency limits its performance in High Dynamic Range (HDR) environments. In this work, a lightweight network is used to extract…

Computer Vision and Pattern Recognition · Computer Science 2024-05-28 Yicheng Lin , Shuo Wang , Yunlong Jiang , Bin Han

Active Galactic Nuclei (AGN) and star-forming galaxies are leading candidates for being the luminous sources that reionized our Universe. Next-generation 21cm surveys are promising to break degeneracies between a broad range of reionization…

Cosmology and Nongalactic Astrophysics · Physics 2018-12-20 Sultan Hassan , Adrian Liu , Saul Kohn , Paul La Plante

Training a neural network (NN) typically relies on some type of curve-following method, such as gradient descent (GD) (and stochastic gradient descent (SGD)), ADADELTA, ADAM or limited memory algorithms. Convergence for these algorithms…

Machine Learning · Computer Science 2023-05-08 Michael A Kouritzin , Stephen Styles , Beatrice-Helen Vritsiou

This paper introduces a Scalable Hierarchical Aware Convolutional Neural Network (SHA-CNN) model architecture for Edge AI applications. The proposed hierarchical CNN model is meticulously crafted to strike a balance between computational…

Neural and Evolutionary Computing · Computer Science 2024-08-01 Narendra Singh Dhakad , Yuvnish Malhotra , Santosh Kumar Vishvakarma , Kaushik Roy

Recent progress on salient object detection mainly aims at exploiting how to effectively integrate multi-scale convolutional features in convolutional neural networks (CNNs). Many popular methods impose deep supervision to perform…

Computer Vision and Pattern Recognition · Computer Science 2021-01-21 Yun Liu , Ming-Ming Cheng , Xinyu Zhang , Guang-Yu Nie , Meng Wang

Fully Convolutional Neural Network (FCN) has been widely applied to salient object detection recently by virtue of high-level semantic feature extraction, but existing FCN based methods still suffer from continuous striding and pooling…

Computer Vision and Pattern Recognition · Computer Science 2019-08-13 Zhengzheng Tu , Yan Ma , Chenglong Li , Jin Tang , Bin Luo

Porous media is widely distributed in nature, found in environments such as soil, rock formations, and plant tissues, and is crucial in applications like subsurface oil and gas extraction, medical drug delivery, and filtration systems.…

Geophysics · Physics 2025-01-03 Qingqi Zhao , Xiaoxue Han , Ruichang Guo , Cheng Chen

We present Smooth Grad-CAM++, a technique which combines two recent techniques: SMOOTHGRAD and Grad-CAM++. Smooth Grad-CAM++ has the capability of either visualizing a layer, subset of feature maps, or subset of neurons within a feature map…

Computer Vision and Pattern Recognition · Computer Science 2019-12-05 Daniel Omeiza

One of the most crucial tasks in seismic reflection imaging is to identify the salt bodies with high precision. Traditionally, this is accomplished by visually picking the salt/sediment boundaries, which requires a great amount of manual…

Geophysics · Physics 2019-09-18 Yu Zeng , Kebei Jiang , Jie Chen

Classifying variable stars is crucial for advancing our understanding of stellar evolution and dynamics. As large-scale surveys generate increasing volumes of light curve data, the demand for automated and reliable classification techniques…

Solar and Stellar Astrophysics · Physics 2025-08-19 Almat Akhmetali , Alisher Zhunuskanov , Timur Namazbayev , Marat Zaidyn , Aknur Sakan , Dana Turlykozhayeva , Nurzhan Ussipov

Resampling detection plays an important role in identifying image tampering, such as image splicing. Currently, the resampling detection is still difficult in recompressed images, which are yielded by applying resampling followed by…

Computer Vision and Pattern Recognition · Computer Science 2019-05-13 Gang Cao , Antao Zhou , Xianglin Huang , Gege Song , Lifang Yang , Yonggui Zhu

Recent salient object detection (SOD) methods based on deep neural network have achieved remarkable performance. However, most of existing SOD models designed for low-resolution input perform poorly on high-resolution images due to the…

Computer Vision and Pattern Recognition · Computer Science 2022-04-13 Chenxi Xie , Changqun Xia , Mingcan Ma , Zhirui Zhao , Xiaowu Chen , Jia Li
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