Search Results for author: Richard Leahy

Found 5 papers, 1 papers with code

Knowledge-guided EEG Representation Learning

no code implementations15 Feb 2024 Aditya Kommineni, Kleanthis Avramidis, Richard Leahy, Shrikanth Narayanan

We also propose a novel knowledge-guided pre-training objective that accounts for the idiosyncrasies of the EEG signal.

EEG Representation Learning +1

Learning A Disentangling Representation For PU Learning

no code implementations5 Oct 2023 Omar Zamzam, Haleh Akrami, Mahdi Soltanolkotabi, Richard Leahy

In this paper we propose to learn a neural network-based data representation using a loss function that can be used to project the unlabeled data into two (positive and negative) clusters that can be easily identified using simple clustering techniques, effectively emulating the phenomenon observed in low-dimensional settings.

Clustering Density Estimation +2

Beta quantile regression for robust estimation of uncertainty in the presence of outliers

no code implementations14 Sep 2023 Haleh Akrami, Omar Zamzam, Anand Joshi, Sergul Aydore, Richard Leahy

Outlier features can compromise the performance of deep learning regression problems such as style translation, image reconstruction, and deep anomaly detection, potentially leading to misleading conclusions.

Anomaly Detection Image Reconstruction +3

Learning From Positive and Unlabeled Data Using Observer-GAN

no code implementations26 Aug 2022 Omar Zamzam, Haleh Akrami, Richard Leahy

In our suggested method, the GAN discriminator instructs the generator only to produce samples that fall into the unlabeled data distribution, while a second classifier (observer) network monitors the GAN training to: (i) prevent the generated samples from falling into the positive distribution; and (ii) learn the features that are the key distinction between the positive and negative observations.

Deep Quantile Regression for Uncertainty Estimation in Unsupervised and Supervised Lesion Detection

1 code implementation20 Sep 2021 Haleh Akrami, Anand Joshi, Sergul Aydore, Richard Leahy

Here we address the problem of quantifying uncertainty in the images that are reconstructed by the VAE as the basis for principled outlier or lesion detection.

Anomaly Detection Lesion Detection +2

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