Search Results for author: Stefanos Kollias

Found 22 papers, 6 papers with code

Estimating the Robustness Radius for Randomized Smoothing with 100$\times$ Sample Efficiency

no code implementations26 Apr 2024 Emmanouil Seferis, Stefanos Kollias, Chih-Hong Cheng

Randomized smoothing (RS) has successfully been used to improve the robustness of predictions for deep neural networks (DNNs) by adding random noise to create multiple variations of an input, followed by deciding the consensus.

Uncertainty-guided Contrastive Learning for Single Source Domain Generalisation

no code implementations12 Mar 2024 Anastasios Arsenos, Dimitrios Kollias, Evangelos Petrongonas, Christos Skliros, Stefanos Kollias

In the context of single domain generalisation, the objective is for models that have been exclusively trained on data from a single domain to demonstrate strong performance when confronted with various unfamiliar domains.

Contrastive Learning

COVID-19 Computer-aided Diagnosis through AI-assisted CT Imaging Analysis: Deploying a Medical AI System

no code implementations10 Mar 2024 Demetris Gerogiannis, Anastasios Arsenos, Dimitrios Kollias, Dimitris Nikitopoulos, Stefanos Kollias

Computer-aided diagnosis (CAD) systems stand out as potent aids for physicians in identifying the novel Coronavirus Disease 2019 (COVID-19) through medical imaging modalities.

Domain adaptation, Explainability & Fairness in AI for Medical Image Analysis: Diagnosis of COVID-19 based on 3-D Chest CT-scans

1 code implementation4 Mar 2024 Dimitrios Kollias, Anastasios Arsenos, Stefanos Kollias

The paper presents the DEF-AI-MIA COV19D Competition, which is organized in the framework of the 'Domain adaptation, Explainability, Fairness in AI for Medical Image Analysis (DEF-AI-MIA)' Workshop of the 2024 Computer Vision and Pattern Recognition (CVPR) Conference.

Domain Adaptation Fairness

A Deep Neural Architecture for Harmonizing 3-D Input Data Analysis and Decision Making in Medical Imaging

no code implementations1 Mar 2023 Dimitrios Kollias, Anastasios Arsenos, Stefanos Kollias

Harmonizing the analysis of data, especially of 3-D image volumes, consisting of different number of slices and annotated per volume, is a significant problem in training and using deep neural networks in various applications, including medical imaging.

COVID-19 Diagnosis Decision Making

AI-MIA: COVID-19 Detection & Severity Analysis through Medical Imaging

no code implementations9 Jun 2022 Dimitrios Kollias, Anastasios Arsenos, Stefanos Kollias

This paper presents the baseline approach for the organized 2nd Covid-19 Competition, occurring in the framework of the AIMIA Workshop in the European Conference on Computer Vision (ECCV 2022).

DeepMoCap: Deep Optical Motion Capture Using Multiple Depth Sensors and Retro-Reflectors

1 code implementation14 Oct 2021 Anargyros Chatzitofis, Dimitrios Zarpalas, Stefanos Kollias, Petros Daras

DeepMoCap explores motion capture by automatically localizing and labeling reflectors on depth images and, subsequently, on 3D space.

Optical Flow Estimation

MIA-COV19D: COVID-19 Detection through 3-D Chest CT Image Analysis

no code implementations14 Jun 2021 Dimitrios Kollias, Anastasios Arsenos, Levon Soukissian, Stefanos Kollias

In this paper we present the COV19-CT-DB database which is annotated for COVID-19, consisting of about 5, 000 3-D CT scans, We have split the database in training, validation and test datasets.

COVID-19 Diagnosis Disease Prediction

AI-enabled Efficient and Safe Food Supply Chain

no code implementations1 May 2021 Ilianna Kollia, Jack Stevenson, Stefanos Kollias

This paper provides a review of an emerging field in the food processing sector, referring to efficient and safe food supply chains, from farm to fork, as enabled by Artificial Intelligence (AI).

Clustering Domain Adaptation +2

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

A compact sequence encoding scheme for online human activity recognition in HRI applications

no code implementations1 Dec 2020 Georgios Tsatiris, Kostas Karpouzis, Stefanos Kollias

Human activity recognition and analysis has always been one of the most active areas of pattern recognition and machine intelligence, with applications in various fields, including but not limited to exertion games, surveillance, sports analytics and healthcare.

Action Recognition Human Activity Recognition +2

Multi-Source Deep Domain Adaptation for Quality Control in Retail Food Packaging

no code implementations28 Jan 2020 Mamatha Thota, Stefanos Kollias, Mark Swainson, Georgios Leontidis

The presence and accuracy of such information is critical to ensure a detailed understanding of the product and to reduce the potential for health risks.

Domain Adaptation

A Unified Deep Learning Approach for Prediction of Parkinson's Disease

no code implementations25 Nov 2019 James Wingate, Ilianna Kollia, Luc Bidaut, Stefanos Kollias

The paper presents a novel approach, based on deep learning, for diagnosis of Parkinson's disease through medical imaging.

Domain Adaptation Transfer Learning

Using Deep Learning to Predict Plant Growth and Yield in Greenhouse Environments

no code implementations1 Jul 2019 Bashar Alhnaity, Simon Pearson, Georgios Leontidis, Stefanos Kollias

Effective plant growth and yield prediction is an essential task for greenhouse growers and for agriculture in general.

regression

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

A Scalable Test Suite for Continuous Dynamic Multiobjective Optimisation

no code implementations6 Mar 2019 Shouyong Jiang, Marcus Kaiser, Shengxiang Yang, Stefanos Kollias, Natalio Krasnogor

It is demonstrated with empirical studies that the proposed test suite is more challenging to the dynamic multiobjective optimisation algorithms found in the literature.

Predicting Parkinson's Disease using Latent Information extracted from Deep Neural Networks

no code implementations23 Jan 2019 Ilianna Kollia, Andreas-Georgios Stafylopatis, Stefanos Kollias

This paper presents a new method for medical diagnosis of neurodegenerative diseases, such as Parkinson's, by extracting and using latent information from trained Deep convolutional, or convolutional-recurrent Neural Networks (DNNs).

Clustering General Classification +2

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.

Cannot find the paper you are looking for? You can Submit a new open access paper.