Search Results for author: Fabio De Sousa Ribeiro

Found 14 papers, 6 papers with code

Counterfactual contrastive learning: robust representations via causal image synthesis

1 code implementation14 Mar 2024 Melanie Roschewitz, Fabio De Sousa Ribeiro, Tian Xia, Galvin Khara, Ben Glocker

Contrastive pretraining is well-known to improve downstream task performance and model generalisation, especially in limited label settings.

Contrastive Learning counterfactual +2

Mitigating attribute amplification in counterfactual image generation

no code implementations14 Mar 2024 Tian Xia, Mélanie Roschewitz, Fabio De Sousa Ribeiro, Charles Jones, Ben Glocker

Causal generative modelling is gaining interest in medical imaging due to its ability to answer interventional and counterfactual queries.

Attribute counterfactual +1

Demystifying Variational Diffusion Models

no code implementations11 Jan 2024 Fabio De Sousa Ribeiro, Ben Glocker

Despite the growing popularity of diffusion models, gaining a deep understanding of the model class remains somewhat elusive for the uninitiated in non-equilibrium statistical physics.

No Fair Lunch: A Causal Perspective on Dataset Bias in Machine Learning for Medical Imaging

no code implementations31 Jul 2023 Charles Jones, Daniel C. Castro, Fabio De Sousa Ribeiro, Ozan Oktay, Melissa McCradden, Ben Glocker

As machine learning methods gain prominence within clinical decision-making, addressing fairness concerns becomes increasingly urgent.

Decision Making Fairness

Grounded Object Centric Learning

no code implementations18 Jul 2023 Avinash Kori, Francesco Locatello, Fabio De Sousa Ribeiro, Francesca Toni, Ben Glocker

The extraction of modular object-centric representations for downstream tasks is an emerging area of research.

Object Object Discovery +3

High Fidelity Image Counterfactuals with Probabilistic Causal Models

1 code implementation27 Jun 2023 Fabio De Sousa Ribeiro, Tian Xia, Miguel Monteiro, Nick Pawlowski, Ben Glocker

We present a general causal generative modelling framework for accurate estimation of high fidelity image counterfactuals with deep structural causal models.

counterfactual

Learning with Capsules: A Survey

no code implementations6 Jun 2022 Fabio De Sousa Ribeiro, Kevin Duarte, Miles Everett, Georgios Leontidis, Mubarak Shah

The aim of this survey is to provide a comprehensive overview of the capsule network research landscape, which will serve as a valuable resource for the community going forward.

Graph Representation Learning

Introducing Routing Uncertainty in Capsule Networks

no code implementations NeurIPS 2020 Fabio De Sousa Ribeiro, Georgios Leontidis, Stefanos Kollias

Rather than performing inefficient local iterative routing between adjacent capsule layers, we propose an alternative global view based on representing the inherent uncertainty in part-object assignment.

Object Variational Inference

Capsule Routing via Variational Bayes

1 code implementation27 May 2019 Fabio De Sousa Ribeiro, Georgios Leontidis, Stefanos Kollias

Capsule networks are a recently proposed type of neural network shown to outperform alternatives in challenging shape recognition tasks.

Image Classification

Deep Bayesian Self-Training

1 code implementation26 Nov 2018 Fabio De Sousa Ribeiro, Francesco Caliva, Mark Swainson, Kjartan Gudmundsson, Georgios Leontidis, Stefanos Kollias

Supervised Deep Learning has been highly successful in recent years, achieving state-of-the-art results in most tasks.

Clustering Variational Inference

Towards a Deep Unified Framework for Nuclear Reactor Perturbation Analysis

no code implementations26 Jul 2018 Fabio De Sousa Ribeiro, Francesco Caliva, Dionysios Chionis, Abdelhamid Dokhane, Antonios Mylonakis, Christophe Demaziere, Georgios Leontidis, Stefanos Kollias

512 dimensional representations were extracted from the 3D-CNN and LSTM architectures, and used as input to a fused multi-sigmoid classification layer to recognise the perturbation type.

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