Search Results for author: Anna M. M. Scaife

Found 14 papers, 12 papers with code

Rare Galaxy Classes Identified In Foundation Model Representations

no code implementations5 Dec 2023 Mike Walmsley, Anna M. M. Scaife

We identify rare and visually distinctive galaxy populations by searching for structure within the learned representations of pretrained models.

Clustering

Bayesian Imaging for Radio Interferometry with Score-Based Priors

no code implementations29 Nov 2023 Noe Dia, M. J. Yantovski-Barth, Alexandre Adam, Micah Bowles, Pablo Lemos, Anna M. M. Scaife, Yashar Hezaveh, Laurence Perreault-Levasseur

The inverse imaging task in radio interferometry is a key limiting factor to retrieving Bayesian uncertainties in radio astronomy in a computationally effective manner.

Astronomy Radio Interferometry

MiraBest: A Dataset of Morphologically Classified Radio Galaxies for Machine Learning

1 code implementation18 May 2023 Fiona A. M. Porter, Anna M. M. Scaife

Existing applications that utilise the MiraBest dataset are reviewed, and an extended dataset of 2100 sources is created by cross-matching MiraBest with other catalogues of radio-loud AGN that have been used more widely in the literature for machine learning applications.

Astronomy

Towards Galaxy Foundation Models with Hybrid Contrastive Learning

1 code implementation23 Jun 2022 Mike Walmsley, Inigo Val Slijepcevic, Micah Bowles, Anna M. M. Scaife

New astronomical tasks are often related to earlier tasks for which labels have already been collected.

Contrastive Learning

Radio Galaxy Zoo: Using semi-supervised learning to leverage large unlabelled data-sets for radio galaxy classification under data-set shift

1 code implementation19 Apr 2022 Inigo V. Slijepcevic, Anna M. M. Scaife, Mike Walmsley, Micah Bowles, Ivy Wong, Stanislav S. Shabala, Hongming Tang

In this work we examine the classification accuracy and robustness of a state-of-the-art semi-supervised learning (SSL) algorithm applied to the morphological classification of radio galaxies.

Benchmarking Classification

Quantifying Uncertainty in Deep Learning Approaches to Radio Galaxy Classification

1 code implementation4 Jan 2022 Devina Mohan, Anna M. M. Scaife, Fiona Porter, Mike Walmsley, Micah Bowles

In this work we use variational inference to quantify the degree of uncertainty in deep learning model predictions of radio galaxy classification.

Classification Data Augmentation +1

Can semi-supervised learning reduce the amount of manual labelling required for effective radio galaxy morphology classification?

1 code implementation8 Nov 2021 Inigo V. Slijepcevic, Anna M. M. Scaife

In this work, we examine the robustness of state-of-the-art semi-supervised learning (SSL) algorithms when applied to morphological classification in modern radio astronomy.

Astronomy Morphology classification

Fanaroff-Riley classification of radio galaxies using group-equivariant convolutional neural networks

2 code implementations16 Feb 2021 Anna M. M. Scaife, Fiona Porter

Weight sharing in convolutional neural networks (CNNs) ensures that their feature maps will be translation-equivariant.

Instrumentation and Methods for Astrophysics Astrophysics of Galaxies

Structured Variational Inference for Simulating Populations of Radio Galaxies

1 code implementation1 Feb 2021 David J. Bastien, Anna M. M. Scaife, Hongming Tang, Micah Bowles, Fiona Porter

We present a model for generating postage stamp images of synthetic Fanaroff-Riley Class I and Class II radio galaxies suitable for use in simulations of future radio surveys such as those being developed for the Square Kilometre Array.

Data Augmentation Variational Inference Instrumentation and Methods for Astrophysics Astrophysics of Galaxies

Attention-gating for improved radio galaxy classification

2 code implementations2 Dec 2020 Micah Bowles, Anna M. M. Scaife, Fiona Porter, Hongming Tang, David J. Bastien

In this work we introduce attention as a state of the art mechanism for classification of radio galaxies using convolutional neural networks.

Classification General Classification

Transfer learning for radio galaxy classification

3 code implementations28 Mar 2019 Hongming Tang, Anna M. M. Scaife, J. P. Leahy

In the context of radio galaxy classification, most state-of-the-art neural network algorithms have been focused on single survey data.

Instrumentation and Methods for Astrophysics

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