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(Abridged) We introduce a novel technique to construct spatially resolved maps of stellar mass surface density in galaxies based on optical and near IR imaging. We use optical/NIR colour(s) to infer effective stellar mass-to-light ratios…

Cosmology and Nongalactic Astrophysics · Physics 2011-03-28 Stefano Zibetti , Stephane Charlot , Hans-Walter Rix

This research presents a machine-learning approach for tumor detection in medical images using convolutional neural networks (CNNs). The study focuses on preprocessing techniques to enhance image features relevant to tumor detection,…

Image and Video Processing · Electrical Eng. & Systems 2024-03-01 Ha Anh Vu

(Abridged) We determine the quantitative morphology and star formation properties of galaxies in six nearby X-ray detected, poor groups using multi-object spectroscopy and wide-field R imaging. We measure structural parameters for each…

Astrophysics · Physics 2009-10-31 Kim-Vy H. Tran , Luc Simard , Ann I. Zabludoff , John S. Mulchaey

Classifying the morphologies of galaxies is an important step in understanding their physical properties and evolutionary histories. The advent of large-scale surveys has hastened the need to develop techniques for automated morphological…

Astrophysics of Galaxies · Physics 2021-12-28 Mitchell K. Cavanagh , Kenji Bekki , Brent A. Groves

In this paper, we propose a Computer Assisted Diagnosis (CAD) system based on a deep Convolutional Neural Network (CNN) model, to build an end-to-end learning process that classifies breast mass lesions. We investigate the impact that has…

Computer Vision and Pattern Recognition · Computer Science 2017-11-30 Hiba Chougrad , Hamid Zouaki , Omar Alheyane

Predicting novel views of a scene from real-world images has always been a challenging task. In this work, we propose a deep convolutional neural network (CNN) which learns to predict novel views of a scene from given collection of images.…

Computer Vision and Pattern Recognition · Computer Science 2021-07-15 Amit More , Subhasis Chaudhuri

Context. Convolutional neural networks (CNNs) are widely used for automated galaxy morphological classification in large surveys. However, projection effects, image artefacts, and intrinsic degeneracies limit reliable identification of…

Bearing fault diagnosis in rotating machinery is critical for ensuring operational reliability, therefore early fault detection is essential to avoid catastrophic failures and expensive emergency repairs. Traditional methods like Fast…

Signal Processing · Electrical Eng. & Systems 2025-09-23 Dilshara Herath , Chinthaka Abeyrathne , Chamindu Adithya , Chathura Seneviratne

We present a novel way of using neural networks (NN) to estimate the redshift distribution of a galaxy sample. We are able to obtain a probability density function (PDF) for each galaxy using a classification neural network. The method is…

Cosmology and Nongalactic Astrophysics · Physics 2015-04-08 Christopher Bonnett

We consider a machine learning algorithm to detect and identify strong gravitational lenses on sky images. First, we simulate different artificial but very close to reality images of galaxies, stars and strong lenses, using six different…

Instrumentation and Methods for Astrophysics · Physics 2021-04-06 H. G. Khachatryan

Galaxies can be described by features of their optical spectra such as oxygen emission lines, or morphological features such as spiral arms. Although spectroscopy provides a rich description of the physical processes that govern galaxy…

Instrumentation and Methods for Astrophysics · Physics 2020-12-01 John F. Wu , J. E. G. Peek

Early detection of pulmonary cancer is the most promising way to enhance a patient's chance for survival. Accurate pulmonary nodule detection in computed tomography (CT) images is a crucial step in diagnosing pulmonary cancer. In this…

Computer Vision and Pattern Recognition · Computer Science 2017-08-30 Jia Ding , Aoxue Li , Zhiqiang Hu , Liwei Wang

This paper addresses the task of set prediction using deep learning. This is important because the output of many computer vision tasks, including image tagging and object detection, are naturally expressed as sets of entities rather than…

Computer Vision and Pattern Recognition · Computer Science 2017-08-14 S. Hamid Rezatofighi , Vijay Kumar B G , Anton Milan , Ehsan Abbasnejad , Anthony Dick , Ian Reid

The total masses of galaxy clusters characterize many aspects of astrophysics and the underlying cosmology. It is crucial to obtain reliable and accurate mass estimates for numerous galaxy clusters over a wide range of redshifts and mass…

Instrumentation and Methods for Astrophysics · Physics 2022-03-30 Sheng-Chieh Lin , Yuanyuan Su , Gongbo Liang , Yuanyuan Zhang , Nathan Jacobs , Yu Zhang

We present a novel approach for estimating cosmological parameters, $\Omega_m$, $\sigma_8$, $w_0$, and one derived parameter, $S_8$, from 3D lightcone data of dark matter halos in redshift space covering a sky area of $40^\circ \times…

Cosmology and Nongalactic Astrophysics · Physics 2023-11-03 Se Yeon Hwang , Cristiano G. Sabiu , Inkyu Park , Sungwook E. Hong

In this paper, we study an application of deep learning to the advanced LIGO and advanced Virgo coincident detection of gravitational waves (GWs) from compact binary star mergers. This deep learning method is an extension of the Deep…

Instrumentation and Methods for Astrophysics · Physics 2019-02-20 Xilong Fan , Jin Li , Xin Li , Yuanhong Zhong , Junwei Cao

The next generation of data-intensive surveys are bound to produce a vast amount of data, which can be dealt with using machine-learning methods to explore possible correlations within the multi-dimensional parameter space. We explore the…

Galaxy mergers are crucial for understanding galaxy evolution, and with large upcoming datasets, automated methods such as Convolutional Neural Networks (CNNs) are essential for efficient detection. It is understood that CNNs classify…

Astrophysics of Galaxies · Physics 2026-02-17 D. M. Chudy , W. J. Pearson , A. Pollo , L. E. Suelves , B. Margalef-Bentabol , L. Wang , V. Rodriguez-Gomez , A. La Marca

This paper addresses the task of estimating the light arriving from all directions to a 3D point observed at a selected pixel in an RGB image. This task is challenging because it requires predicting a mapping from a partial scene…

Computer Vision and Pattern Recognition · Computer Science 2019-06-19 Shuran Song , Thomas Funkhouser

A significant fraction of high redshift star-forming disc galaxies are known to host giant clumps, whose nature and role in galaxy evolution are yet to be understood. In this work we first present a new method based on neural networks to…