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We present a semi-supervised method for photometric supernova typing. Our approach is to first use the nonlinear dimension reduction technique diffusion map to detect structure in a database of supernova light curves and subsequently employ…

天体物理仪器与方法 · 物理学 2015-05-27 Joseph W. Richards , Darren Homrighausen , Peter E. Freeman , Chad M. Schafer , Dovi Poznanski

The efficient classification of different types of supernova is one of the most important problems for observational cosmology. However, spectroscopic confirmation of most objects in upcoming photometric surveys, such as the The Rubin…

宇宙学与河外天体物理 · 物理学 2020-08-17 Marcelo Vargas dos Santos , Miguel Quartin , Ribamar R. R. Reis

Deep Convolutional Neural Network (DCNN) and Transformer have achieved remarkable successes in image recognition. However, their performance in fine-grained image recognition is still difficult to meet the requirements of actual needs. This…

计算机视觉与模式识别 · 计算机科学 2021-06-08 Chaorong Li , Malu Zhang , Wei Huang , Fengqing Qin , Anping Zeng , Yuanyuan Huang

Convolutional Neural Networks (CNNs) are one of the most studied family of deep learning models for signal classification, including modulation, technology, detection, and identification. In this work, we focus on technology classification…

机器学习 · 计算机科学 2022-05-02 Amir-Hossein Yazdani-Abyaneh , Marwan Krunz

Change detection is a key task in Earth observation applications. Recently, deep learning methods have demonstrated strong performance and widespread application. However, change detection faces data scarcity due to the labor-intensive…

计算机视觉与模式识别 · 计算机科学 2025-03-27 Ziyu Zhou , Keyan Hu , Yutian Fang , Xiaoping Rui

The dominant approach for surface defect detection is the use of hand-crafted feature-based methods. However, this falls short when conditions vary that affect extracted images. So, in this paper, we sought to determine how well several…

计算机视觉与模式识别 · 计算机科学 2021-10-29 Vasco Lopes , Luís A. Alexandre

Hyper spectral images have drawn the attention of the researchers for its complexity to classify. It has nonlinear relation between the materials and the spectral information provided by the HSI image. Deep learning methods have shown…

图像与视频处理 · 电气工程与系统科学 2024-02-16 Alok Ranjan Sahoo , Pavan Chakraborty

The Legacy Survey of Space and Time (LSST) at the Vera C. Rubin Observatory will discover tens of thousands of extragalactic transients each night. The high volume of alerts demands immediate classification of transient types in order to…

星系天体物理 · 物理学 2023-01-11 Marina Kisley , Yu-Jing Qin , Ann Zabludoff , Kobus Barnard , Chia-Lin Ko

Photometric classification of Type Ia supernovae (SNe Ia) is critical for cosmological studies but remains difficult due to class imbalance and observational noise. While deep learning models have been explored, they are often…

高能天体物理现象 · 物理学 2026-03-17 Anurag Garg

The ongoing optical time-domain astronomy surveys are routinely reporting fifty transient candidates per night. Here, I investigate the demographics of astronomical transients and supernova classifications reported to the Transient Name…

天体物理仪器与方法 · 物理学 2020-04-14 S. R. Kulkarni

Navigation and mobility are some of the major problems faced by visually impaired people in their daily lives. Advances in computer vision led to the proposal of some navigation systems. However, most of them require expensive and/or heavy…

计算机视觉与模式识别 · 计算机科学 2020-05-12 Fabricio Breve , Carlos Norberto Fischer

Time Series Classification (TSC) is an important and challenging problem in data mining. With the increase of time series data availability, hundreds of TSC algorithms have been proposed. Among these methods, only a few have considered Deep…

Convolutional neural networks (CNNs) are usually built by stacking convolutional operations layer-by-layer. Although CNN has shown strong capability to extract semantics from raw pixels, its capacity to capture spatial relationships of…

计算机视觉与模式识别 · 计算机科学 2026-01-16 Xingang Pan , Xiaohang Zhan , Jianping Shi , Ping Luo , Xiaogang Wang , Xiaoou Tang

Accurate classification of fine-grained images remains a challenge in backbones based on convolutional operations or self-attention mechanisms. This study proposes novel dual-current neural networks (DCNN), which combine the advantages of…

计算机视觉与模式识别 · 计算机科学 2024-05-08 Da Fu , Mingfei Rong , Eun-Hu Kim , Hao Huang , Witold Pedrycz

(abridged) Ongoing supernova (SN) surveys find hundreds of candidates, that require confirmation for their use. Traditional classification based on followup spectroscopy of all candidates is virtually impossible for these large samples. We…

天体物理学 · 物理学 2008-11-26 Dovi Poznanski , Dan Maoz , Avishay Gal-Yam

Recently, convolutional neural network (CNN) techniques have gained popularity as a tool for hyperspectral image classification (HSIC). To improve the feature extraction efficiency of HSIC under the condition of limited samples, the current…

计算机视觉与模式识别 · 计算机科学 2023-04-06 Hongmin Gao , Zhonghao Chen , Chenming Li

Knowledge of molecular subtypes of gliomas can provide valuable information for tailored therapies. This study aimed to investigate the use of deep convolutional neural networks (DCNNs) for noninvasive glioma subtyping with radiological…

图像与视频处理 · 电气工程与系统科学 2022-03-14 Dong Wei , Yiming Li , Yinyan Wang , Tianyi Qian , Yefeng Zheng

There is a strong need for automated systems to improve diagnostic quality and reduce the analysis time in histopathology image processing. Automated detection and classification of pathological tissue characteristics with computer-aided…

计算机视觉与模式识别 · 计算机科学 2019-11-22 Muhammed Talo

The Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) is currently the deepest wide- field survey in progress. The 8.2 m aperture of Subaru telescope is very powerful in detect- ing faint/small moving objects, including near-Earth…

Supervised classification of temporal sequences of astronomical images into meaningful transient astrophysical phenomena has been considered a hard problem because it requires the intervention of human experts. The classifier uses the…

天体物理仪器与方法 · 物理学 2020-10-07 Catalina Gómez , Mauricio Neira , Marcela Hernández Hoyos , Pablo Arbeláez , Jaime E. Forero-Romero