Search Results for author: Arjun Pakrashi

Found 10 papers, 3 papers with code

Counterfactual Explanations for Misclassified Images: How Human and Machine Explanations Differ

1 code implementation16 Dec 2022 Eoin Delaney, Arjun Pakrashi, Derek Greene, Mark T. Keane

Counterfactual explanations have emerged as a popular solution for the eXplainable AI (XAI) problem of elucidating the predictions of black-box deep-learning systems due to their psychological validity, flexibility across problem domains and proposed legal compliance.

counterfactual Explainable Artificial Intelligence (XAI)

Random Walk-steered Majority Undersampling

no code implementations25 Sep 2021 Payel Sadhukhan, Arjun Pakrashi, Brian Mac Namee

In this work, we propose Random Walk-steered Majority Undersampling (RWMaU), which undersamples the majority points of a class imbalanced dataset, in order to balance the classes.

Integrating Unsupervised Clustering and Label-specific Oversampling to Tackle Imbalanced Multi-label Data

no code implementations25 Sep 2021 Payel Sadhukhan, Arjun Pakrashi, Sarbani Palit, Brian Mac Namee

The training dataset is augmented with the set of label-specific synthetic minority points, and classifiers are trained to predict the relevance of each label independently.

Clustering Multi-Label Classification

The Deep Radial Basis Function Data Descriptor (D-RBFDD) Network: A One-Class Neural Network for Anomaly Detection

no code implementations29 Jan 2021 Mehran H. Z. Bazargani, Arjun Pakrashi, Brian Mac Namee

The Radial Basis Function Data Descriptor (RBFDD) network is an effective solution for anomaly detection, however, it is a shallow model that does not deal effectively with raw data representations.

Anomaly Detection Image Classification +2

Ramifications of Approximate Posterior Inference for Bayesian Deep Learning in Adversarial and Out-of-Distribution Settings

1 code implementation3 Sep 2020 John Mitros, Arjun Pakrashi, Brian Mac Namee

Deep neural networks have been successful in diverse discriminative classification tasks, although, they are poorly calibrated often assigning high probability to misclassified predictions.

Bayesian Inference Out-of-Distribution Detection

ML-KFHE: Multi-label ensemble classification algorithm exploiting sensor fusion properties of the Kalman filter

no code implementations23 Apr 2019 Arjun Pakrashi, Brian Mac Namee

The Kalman Filter-based Heuristic Ensemble (KFHE) is an ensemble method that exploits the sensor fusion properties of the Kalman filter to combine several classifier models, and that has been shown to be very effective.

General Classification Multi-class Classification +2

CascadeML: An Automatic Neural Network Architecture Evolution and Training Algorithm for Multi-label Classification

no code implementations23 Apr 2019 Arjun Pakrashi, Brian Mac Namee

Multi-label classification is an approach which allows a datapoint to be labelled with more than one class at the same time.

AutoML General Classification +1

A Kalman filtering induced heuristic optimization based partitional data clustering

no code implementations25 Jan 2019 Arjun Pakrashi, Bidyut. B. Chaudhuri

Clustering algorithms have regained momentum with recent popularity of data mining and knowledge discovery approaches.

Clustering

MeetupNet Dublin: Discovering Communities in Dublin's Meetup Network

1 code implementation6 Oct 2018 Arjun Pakrashi, Elham Alghamdi, Brian Mac Namee, Derek Greene

Meetup. com is a global online platform which facilitates the organisation of meetups in different parts of the world.

Social and Information Networks Computers and Society

Kalman Filter-based Heuristic Ensemble (KFHE): A new perspective on multi-class ensemble classification using Kalman filters

no code implementations30 Jul 2018 Arjun Pakrashi, Brian Mac Namee

This paper introduces a new perspective on multi-class ensemble classification that considers training an ensemble as a state estimation problem.

Classification General Classification

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