Search Results for author: Ian Walker

Found 4 papers, 0 papers with code

Causality matters in medical imaging

no code implementations17 Dec 2019 Daniel C. Castro, Ian Walker, Ben Glocker

This article discusses how the language of causality can shed new light on the major challenges in machine learning for medical imaging: 1) data scarcity, which is the limited availability of high-quality annotations, and 2) data mismatch, whereby a trained algorithm may fail to generalize in clinical practice.

BIG-bench Machine Learning Image Segmentation +3

Graph Convolutional Gaussian Processes

no code implementations14 May 2019 Ian Walker, Ben Glocker

We propose a novel Bayesian nonparametric method to learn translation-invariant relationships on non-Euclidean domains.

BIG-bench Machine Learning Gaussian Processes +2

Semi-Supervised Learning via Compact Latent Space Clustering

no code implementations ICML 2018 Konstantinos Kamnitsas, Daniel C. Castro, Loic Le Folgoc, Ian Walker, Ryutaro Tanno, Daniel Rueckert, Ben Glocker, Antonio Criminisi, Aditya Nori

We present a novel cost function for semi-supervised learning of neural networks that encourages compact clustering of the latent space to facilitate separation.

Clustering

An Energy Minimization Approach to 3D Non-Rigid Deformable Surface Estimation Using RGBD Data

no code implementations2 Aug 2017 Bryan Willimon, Steven Hickson, Ian Walker, Stan Birchfield

In particular, we show that our method is able to estimate the configuration of a textureless nonrigid object with no correspondences available.

Object

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