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Solar flares represent one of the most intense forms of solar activity. Understanding the evolution of physical parameters in the solar atmosphere during flares is key to studying flare mechanisms and improving prediction capabilities.…

Solar and Stellar Astrophysics · Physics 2026-05-27 W. Xu , Q. Hao , Z. Zheng , J. Hong , J. Hu , Y. Qiu , C. Li , M. D. Ding , C. Fang

In this paper, we study stellar light curves from the TESS satellite (Transiting Exoplanet Survey Satellite) for the presence of stellar flares. The main aim is to detect stellar flares using two-minutes cadence data and to perform…

Solar and Stellar Astrophysics · Physics 2022-08-31 Małgorzata Pietras , Robert Falewicz , Marek Siarkowski , Kamil Bicz , Paweł Preś

We present the first derivation of a stellar flare temperature profile from single-band photometry. Stellar flare DWF030225.574-545707.45129 was detected in 2015 by the Dark Energy Camera as part of the Deeper, Wider, Faster Programme. The…

Solar and Stellar Astrophysics · Physics 2025-10-08 Riley Clarke , Federica Bianco , James R. A. Davenport , Jeffery Cooke , Sara Webb , Igor Andreoni , Tyler Pritchard , Aaron Roodman

Due to the world's demand for security systems, biometrics can be seen as an important topic of research in computer vision. One of the biometric forms that has been gaining attention is the recognition based on sclera. The initial and…

Computer Vision and Pattern Recognition · Computer Science 2019-05-28 Diego R. Lucio , Rayson Laroca , Evair Severo , Alceu S. Britto , David Menotti

Solar flare forecasting mainly relies on photospheric magnetograms and associated physical features to predict forthcoming flares. However, it is believed that flare initiation mechanisms often originate in the chromosphere and the lower…

Solar and Stellar Astrophysics · Physics 2024-10-22 Grégoire Francisco , Sabrina Guastavino , Teresa Barata , João Fernandes , Dario Del Moro

With machine learning entering into the awareness of the heliophysics community, solar flare prediction has become a topic of increased interest. Although machine learning models have advanced with each successive publication, the input…

Solar and Stellar Astrophysics · Physics 2020-03-11 Brandon Panos , Lucia Kleint

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

In this paper, we present a conceptually simple, strong, and efficient framework for fully- and weakly-supervised panoptic segmentation, called Panoptic FCN. Our approach aims to represent and predict foreground things and background stuff…

Computer Vision and Pattern Recognition · Computer Science 2022-10-14 Yanwei Li , Hengshuang Zhao , Xiaojuan Qi , Yukang Chen , Lu Qi , Liwei Wang , Zeming Li , Jian Sun , Jiaya Jia

Active galactic nuclei (AGNs) are known to exhibit stochastic variability across a wide range of timescales and wavelengths. AGN flares are extreme outbursts that deviate from this typical behavior and may trace a range of energetic…

We present MargNet, a deep learning-based classifier for identifying stars, quasars and compact galaxies using photometric parameters and images from the Sloan Digital Sky Survey (SDSS) Data Release 16 (DR16) catalogue. MargNet consists of…

Astrophysics of Galaxies · Physics 2022-11-16 Siddharth Chaini , Atharva Bagul , Anish Deshpande , Rishi Gondkar , Kaushal Sharma , M. Vivek , Ajit Kembhavi

In this paper we introduce a reliable, fully automated and fast algorithm to detect extended extragalactic radio sources (cluster of galaxies, filaments) in existing and forthcoming surveys (like LOFAR and SKA). The proposed solution is…

Instrumentation and Methods for Astrophysics · Physics 2018-09-11 Claudio Gheller , Franco Vazza , Annalisa Bonafede

Faint tidal features around galaxies record their merger and interaction histories over cosmic time. Due to their low surface brightnesses and complex morphologies, existing automated methods struggle to detect such features and most work…

Astrophysics of Galaxies · Physics 2018-11-29 Mike Walmsley , Annette M. N. Ferguson , Robert G. Mann , Chris J. Lintott

Flare research is becoming a burgeoning realm in the study of stellar activity due to the launch of {\it Kepler} in 2009. {\it Kepler} provides data with two time resolutions, i.e., the long-cadence (LC) data with a time resolution of 30…

Solar and Stellar Astrophysics · Physics 2018-06-06 Huiqin Yang , Jifeng Liu , Erlin Qiao , Haotong Zhang , Qing Gao , Kaiming Cui , Henggeng Han

Face detection has achieved great success using the region-based methods. In this report, we propose a region-based face detector applying deep networks in a fully convolutional fashion, named Face R-FCN. Based on Region-based Fully…

Computer Vision and Pattern Recognition · Computer Science 2017-09-19 Yitong Wang , Xing Ji , Zheng Zhou , Hao Wang , Zhifeng Li

A key problem in salient object detection is how to effectively model the semantic properties of salient objects in a data-driven manner. In this paper, we propose a multi-task deep saliency model based on a fully convolutional neural…

Computer Vision and Pattern Recognition · Computer Science 2016-08-24 Xi Li , Liming Zhao , Lina Wei , Ming-Hsuan Yang , Fei Wu , Yueting Zhuang , Haibin Ling , Jingdong Wang

This paper presents a post hoc analysis of a deep learning-based full-disk solar flare prediction model. We used hourly full-disk line-of-sight magnetogram images and selected binary prediction mode to predict the occurrence of…

Machine Learning · Computer Science 2023-10-10 Chetraj Pandey , Rafal A. Angryk , Manolis K. Georgoulis , Berkay Aydin

Facial landmark detection is an important yet challenging task for real-world computer vision applications. This paper proposes an effective and robust approach for facial landmark detection by combining data- and model-driven methods.…

Computer Vision and Pattern Recognition · Computer Science 2018-02-13 Hongwen Zhang , Qi Li , Zhenan Sun , Yunfan Liu

We present the largest ground-based catalogue of M-dwarf flares to date, comprising 1,229 time-resolved events identified in Zwicky Transient Facility Data Release 17. Using high-cadence ZTF observations collected between April 2018 and…

Solar and Stellar Astrophysics · Physics 2026-03-04 A. D. Lavrukhina , B. Demkov , K. Malanchev , M. V. Pruzhinskaya , E. E. O. Ishida

Conventional deep convolutional neural networks (CNNs) apply convolution operators uniformly in space across all feature maps for hundreds of layers - this incurs a high computational cost for real-time applications. For many problems such…

Computer Vision and Pattern Recognition · Computer Science 2018-06-08 Mengye Ren , Andrei Pokrovsky , Bin Yang , Raquel Urtasun

Component separation is the process with which emission sources in astrophysical maps are generally extracted by taking multi-frequency information into account. It is crucial to develop more reliable methods for component separation for…

Cosmology and Nongalactic Astrophysics · Physics 2022-10-19 J. M. Casas , L. Bonavera , J. González-Nuevo , C. Baccigalupi , M. M. Cueli , D. Crespo , E. Goitia , J. D. Santos , M. L. Sánchez , F. J. de Cos