Search Results for author: Charles Jones

Found 9 papers, 6 papers with code

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

Synthia's Melody: A Benchmark Framework for Unsupervised Domain Adaptation in Audio

1 code implementation26 Sep 2023 Chia-Hsin Lin, Charles Jones, Björn W. Schuller, Harry Coppock

Despite significant advancements in deep learning for vision and natural language, unsupervised domain adaptation in audio remains relatively unexplored.

Attribute Selection bias +1

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

Risk of Bias in Chest Radiography Deep Learning Foundation Models

2 code implementations7 Sep 2022 Ben Glocker, Charles Jones, Melanie Roschewitz, Stefan Winzeck

Purpose: To analyze a recently published chest radiography foundation model for the presence of biases that could lead to subgroup performance disparities across biological sex and race.

Decision Making Dimensionality Reduction

Structured Uncertainty in the Observation Space of Variational Autoencoders

1 code implementation25 May 2022 James Langley, Miguel Monteiro, Charles Jones, Nick Pawlowski, Ben Glocker

In contrast, improving the model for the observational distribution is rarely considered and typically defaults to a pixel-wise independent categorical or normal distribution.

Image Generation

Potential sources of dataset bias complicate investigation of underdiagnosis by machine learning algorithms

no code implementations19 Jan 2022 Mélanie Bernhardt, Charles Jones, Ben Glocker

The models consistently yield higher FPR on subgroups known to be historically underserved, and the study concludes that the models exhibit and potentially even amplify systematic underdiagnosis.

Decision Making Fairness

Algorithmic encoding of protected characteristics in image-based models for disease detection

1 code implementation27 Oct 2021 Ben Glocker, Charles Jones, Melanie Bernhardt, Stefan Winzeck

We explore test set resampling, transfer learning, multitask learning, and model inspection to assess the relationship between the encoding of protected characteristics and disease detection performance across subgroups.

Decision Making Transfer Learning

An Event-Driven Approach to Serverless Seismic Imaging in the Cloud

1 code implementation3 Sep 2019 Philipp A. Witte, Mathias Louboutin, Henryk Modzelewski, Charles Jones, James Selvage, Felix J. Herrmann

As an alternative to the generic lift and shift approach, we consider the specific application of seismic imaging and demonstrate a serverless and event-driven approach for running large-scale instances of this problem in the cloud.

Distributed, Parallel, and Cluster Computing Geophysics

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