Search Results for author: Roderick Murray-Smith

Found 30 papers, 10 papers with code

GLFNET: Global-Local (frequency) Filter Networks for efficient medical image segmentation

no code implementations1 Mar 2024 Athanasios Tragakis, Qianying Liu, Chaitanya Kaul, Swalpa Kumar Roy, Hang Dai, Fani Deligianni, Roderick Murray-Smith, Daniele Faccio

We propose a novel transformer-style architecture called Global-Local Filter Network (GLFNet) for medical image segmentation and demonstrate its state-of-the-art performance.

Image Segmentation Medical Image Segmentation +1

Generative Fractional Diffusion Models

no code implementations26 Oct 2023 Gabriel Nobis, Marco Aversa, Maximilian Springenberg, Michael Detzel, Stefano Ermon, Shinichi Nakajima, Roderick Murray-Smith, Sebastian Lapuschkin, Christoph Knochenhauer, Luis Oala, Wojciech Samek

We generalize the continuous time framework for score-based generative models from an underlying Brownian motion (BM) to an approximation of fractional Brownian motion (FBM).

mmSense: Detecting Concealed Weapons with a Miniature Radar Sensor

no code implementations28 Feb 2023 Kevin Mitchell, Khaled Kassem, Chaitanya Kaul, Valentin Kapitany, Philip Binner, Andrew Ramsay, Roderick Murray-Smith, Daniele Faccio

For widespread adoption, public security and surveillance systems must be accurate, portable, compact, and real-time, without impeding the privacy of the individuals being observed.

Privacy Preserving

Data Models for Dataset Drift Controls in Machine Learning With Optical Images

1 code implementation4 Nov 2022 Luis Oala, Marco Aversa, Gabriel Nobis, Kurt Willis, Yoan Neuenschwander, Michèle Buck, Christian Matek, Jerome Extermann, Enrico Pomarico, Wojciech Samek, Roderick Murray-Smith, Christoph Clausen, Bruno Sanguinetti

This limits our ability to study and understand the relationship between data generation and downstream machine learning model performance in a physically accurate manner.

Model Selection

Optimizing Vision Transformers for Medical Image Segmentation

1 code implementation14 Oct 2022 Qianying Liu, Chaitanya Kaul, Jun Wang, Christos Anagnostopoulos, Roderick Murray-Smith, Fani Deligianni

For medical image semantic segmentation (MISS), Vision Transformers have emerged as strong alternatives to convolutional neural networks thanks to their inherent ability to capture long-range correlations.

Domain Adaptation Image Segmentation +2

Bessel Equivariant Networks for Inversion of Transmission Effects in Multi-Mode Optical Fibres

no code implementations26 Jul 2022 Joshua Mitton, Simon Peter Mekhail, Miles Padgett, Daniele Faccio, Marco Aversa, Roderick Murray-Smith

We develop a new type of model for solving the task of inverting the transmission effects of multi-mode optical fibres through the construction of an $\mathrm{SO}^{+}(2, 1)$-equivariant neural network.

The Fully Convolutional Transformer for Medical Image Segmentation

2 code implementations1 Jun 2022 Athanasios Tragakis, Chaitanya Kaul, Roderick Murray-Smith, Dirk Husmeier

To address this shortcoming, we propose The Fully Convolutional Transformer (FCT), which builds on the proven ability of Convolutional Neural Networks to learn effective image representations, and combines them with the ability of Transformers to effectively capture long-term dependencies in its inputs.

Image Segmentation Medical Image Segmentation +1

Improving Sequential Query Recommendation with Immediate User Feedback

1 code implementation12 May 2022 Shameem A Puthiya Parambath, Christos Anagnostopoulos, Roderick Murray-Smith

We propose to augment the transformer-based causal language models for query recommendations to adapt to the immediate user feedback using multi-armed bandit (MAB) framework.

Rotation Equivariant 3D Hand Mesh Generation from a Single RGB Image

no code implementations25 Nov 2021 Joshua Mitton, Chaitanya Kaul, Roderick Murray-Smith

Our rotation equivariant model outperforms state-of-the-art methods on a real-world dataset and we demonstrate that it accurately captures the shape and pose in the generated meshes under rotation of the input hand.

Subgraph Permutation Equivariant Networks

no code implementations23 Nov 2021 Joshua Mitton, Roderick Murray-Smith

In this work we develop a new method, named Sub-graph Permutation Equivariant Networks (SPEN), which provides a framework for building graph neural networks that operate on sub-graphs, while using a base update function that is permutation equivariant, that are equivariant to a novel choice of automorphism group.

CpT: Convolutional Point Transformer for 3D Point Cloud Processing

no code implementations21 Nov 2021 Chaitanya Kaul, Joshua Mitton, Hang Dai, Roderick Murray-Smith

It achieves this feat due to its effectiveness in creating a novel and robust attention-based point set embedding through a convolutional projection layer crafted for processing dynamically local point set neighbourhoods.

Segmentation Semantic Segmentation

Learning Robust Controllers Via Probabilistic Model-Based Policy Search

no code implementations26 Oct 2021 Valentin Charvet, Bjørn Sand Jensen, Roderick Murray-Smith

Model-based Reinforcement Learning estimates the true environment through a world model in order to approximate the optimal policy.

Model-based Reinforcement Learning reinforcement-learning +1

Rotation Equivariant Deforestation Segmentation and Driver Classification

2 code implementations25 Oct 2021 Joshua Mitton, Roderick Murray-Smith

Deforestation has become a significant contributing factor to climate change and, due to this, both classifying the drivers and predicting segmentation maps of deforestation has attracted significant interest.

Classification Segmentation

Forward and Inverse models in HCI:Physical simulation and deep learning for inferring 3D finger pose

no code implementations7 Sep 2021 Roderick Murray-Smith, John H. Williamson, Andrew Ramsay, Francesco Tonolini, Simon Rogers, Antoine Loriette

We infer finger 3D position $(x, y, z)$ and pose (pitch and yaw) on a mobile device using capacitive sensors which can sense the finger up to 5cm above the screen.

Position

Max-Utility Based Arm Selection Strategy For Sequential Query Recommendations

no code implementations31 Aug 2021 Shameem A. Puthiya Parambath, Christos Anagnostopoulos, Roderick Murray-Smith, Sean MacAvaney, Evangelos Zervas

We show that such a selection strategy often results in higher cumulative regret and to this end, we propose a selection strategy based on the maximum utility of the arms.

Multi-Armed Bandits

IntenT5: Search Result Diversification using Causal Language Models

no code implementations9 Aug 2021 Sean MacAvaney, Craig Macdonald, Roderick Murray-Smith, Iadh Ounis

Existing approaches often rely on massive query logs and interaction data to generate a variety of possible query intents, which then can be used to re-rank documents.

Causal Language Modeling Language Modelling +1

Adversarial learning of cancer tissue representations

1 code implementation4 Aug 2021 Adalberto Claudio Quiros, Nicolas Coudray, Anna Yeaton, Wisuwat Sunhem, Roderick Murray-Smith, Aristotelis Tsirigos, Ke Yuan

We present an adversarial learning model to extract feature representations of cancer tissue, without the need for manual annotations.

Multiple Instance Learning whole slide images

Survey: Leakage and Privacy at Inference Time

no code implementations4 Jul 2021 Marija Jegorova, Chaitanya Kaul, Charlie Mayor, Alison Q. O'Neil, Alexander Weir, Roderick Murray-Smith, Sotirios A. Tsaftaris

Leakage of data from publicly available Machine Learning (ML) models is an area of growing significance as commercial and government applications of ML can draw on multiple sources of data, potentially including users' and clients' sensitive data.

A Graph VAE and Graph Transformer Approach to Generating Molecular Graphs

no code implementations9 Apr 2021 Joshua Mitton, Hans M. Senn, Klaas Wynne, Roderick Murray-Smith

Finally, we demonstrate that the model is interpretable by generating molecules controlled by molecular properties, and we then analyse and visualise the learned latent representation.

Position valid

Learning a low dimensional manifold of real cancer tissue with PathologyGAN

1 code implementation13 Apr 2020 Adalberto Claudio Quiros, Roderick Murray-Smith, Ke Yuan

We present a deep generative model that learns to simulate high-fidelity cancer tissue images while mapping the real images onto an interpretable low dimensional latent space.

Generative Adversarial Network

Spatial images from temporal data

no code implementations2 Dec 2019 Alex Turpin, Gabriella Musarra, Valentin Kapitany, Francesco Tonolini, Ashley Lyons, Ilya Starshynov, Federica Villa, Enrico Conca, Francesco Fioranelli, Roderick Murray-Smith, Daniele Faccio

Traditional paradigms for imaging rely on the use of a spatial structure, either in the detector (pixels arrays) or in the illumination (patterned light).

Retrieval

Penalizing small errors using an Adaptive Logarithmic Loss

no code implementations22 Oct 2019 Chaitanya Kaul, Nick Pears, Hang Dai, Roderick Murray-Smith, Suresh Manandhar

Loss functions are error metrics that quantify the difference between a prediction and its corresponding ground truth.

Image Segmentation Retinal Vessel Segmentation +2

Bayesian parameter estimation using conditional variational autoencoders for gravitational-wave astronomy

2 code implementations13 Sep 2019 Hunter Gabbard, Chris Messenger, Ik Siong Heng, Francesco Tonolini, Roderick Murray-Smith

Gravitational wave (GW) detection is now commonplace and as the sensitivity of the global network of GW detectors improves, we will observe $\mathcal{O}(100)$s of transient GW events per year.

Astronomy Bayesian Inference

PathologyGAN: Learning deep representations of cancer tissue

1 code implementation MIDL 2019 Adalberto Claudio Quiros, Roderick Murray-Smith, Ke Yuan

We show that our model generates high quality images, with a FID of 16. 65 (breast cancer) and 32. 05 (colorectal cancer).

Representation Learning

Variational Sparse Coding

no code implementations ICLR 2019 Francesco Tonolini, Bjorn Sand Jensen, Roderick Murray-Smith

We show that these sparse representations are advantageous over standard VAE representations on two benchmark classification tasks (MNIST and Fashion-MNIST) by demonstrating improved classification accuracy and significantly increased robustness to the number of latent dimensions.

Deep, complex, invertible networks for inversion of transmission effects in multimode optical fibres

1 code implementation NeurIPS 2018 Oisín Moran, Piergiorgio Caramazza, Daniele Faccio, Roderick Murray-Smith

We generated experimental data based on collections of optical fibre responses to greyscale input images generated with coherent light, by measuring only image amplitude (not amplitude and phase as is typical) at the output of \SI{1}{\metre} and \SI{10}{\metre} long, \SI{105}{\micro\metre} diameter multimode fibre.

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