Search Results for author: Georgios Leontidis

Found 28 papers, 4 papers with code

LeOCLR: Leveraging Original Images for Contrastive Learning of Visual Representations

no code implementations11 Mar 2024 Mohammad Alkhalefi, Georgios Leontidis, Mingjun Zhong

Contrastive instance discrimination outperforms supervised learning in downstream tasks like image classification and object detection.

Contrastive Learning Data Augmentation +5

Masked Capsule Autoencoders

no code implementations7 Mar 2024 Miles Everett, Mingjun Zhong, Georgios Leontidis

We propose Masked Capsule Autoencoders (MCAE), the first Capsule Network that utilises pretraining in a self-supervised manner.

ProtoCaps: A Fast and Non-Iterative Capsule Network Routing Method

no code implementations19 Jul 2023 Miles Everett, Mingjun Zhong, Georgios Leontidis

Our findings underscore the potential of our proposed methodology in enhancing the operational efficiency and performance of Capsule Networks, paving the way for their application in increasingly complex computational scenarios.

Tabular Machine Learning Methods for Predicting Gas Turbine Emissions

no code implementations17 Jul 2023 Rebecca Potts, Rick Hackney, Georgios Leontidis

Predicting emissions for gas turbines is critical for monitoring harmful pollutants being released into the atmosphere.

Semantic Positive Pairs for Enhancing Visual Representation Learning of Instance Discrimination methods

no code implementations28 Jun 2023 Mohammad Alkhalefi, Georgios Leontidis, Mingjun Zhong

Self-supervised learning algorithms (SSL) based on instance discrimination have shown promising results, performing competitively or even outperforming supervised learning counterparts in some downstream tasks.

Contrastive Learning Data Augmentation +5

S-JEA: Stacked Joint Embedding Architectures for Self-Supervised Visual Representation Learning

no code implementations19 May 2023 Alžběta Manová, Aiden Durrant, Georgios Leontidis

In this work, we aim to learn highly separable semantic hierarchical representations by stacking Joint Embedding Architectures (JEA) where higher-level JEAs are input with representations of lower-level JEA.

Representation Learning Self-Supervised Learning

HMSN: Hyperbolic Self-Supervised Learning by Clustering with Ideal Prototypes

no code implementations18 May 2023 Aiden Durrant, Georgios Leontidis

Hyperbolic manifolds for visual representation learning allow for effective learning of semantic class hierarchies by naturally embedding tree-like structures with low distortion within a low-dimensional representation space.

Clustering Few-Shot Learning +2

Vanishing Activations: A Symptom of Deep Capsule Networks

no code implementations13 May 2023 Miles Everett, Mingjun Zhong, Georgios Leontidis

This paper extends the investigation to a range of leading Capsule Network architectures, demonstrating that these issues are not confined to the original design.

Model Pruning Enables Localized and Efficient Federated Learning for Yield Forecasting and Data Sharing

no code implementations19 Apr 2023 Andy Li, Milan Markovic, Peter Edwards, Georgios Leontidis

Federated Learning (FL) presents a decentralized approach to model training in the agri-food sector and offers the potential for improved machine learning performance, while ensuring the safety and privacy of individual farms or data silos.

Federated Learning Network Pruning

Deep learning universal crater detection using Segment Anything Model (SAM)

no code implementations16 Apr 2023 Iraklis Giannakis, Anshuman Bhardwaj, Lydia Sam, Georgios Leontidis

Existing ML approaches for automated crater detection have been trained in specific types of data e. g. digital elevation model (DEM), images and associated metadata for orbiters such as the Lunar Reconnaissance Orbiter Camera (LROC) etc.. Due to that, each of the resulting ML schemes is applicable and reliable only to the type of data used during the training process.

Zero-shot Generalization

Premonition Net, A Multi-Timeline Transformer Network Architecture Towards Strawberry Tabletop Yield Forecasting

no code implementations15 Nov 2022 George Onoufriou, Marc Hanheide, Georgios Leontidis

Yield forecasting is a critical first step necessary for yield optimisation, with important consequences for the broader food supply chain, procurement, price-negotiation, logistics, and supply.

LLEDA -- Lifelong Self-Supervised Domain Adaptation

no code implementations12 Nov 2022 Mamatha Thota, Dewei Yi, Georgios Leontidis

Humans and animals have the ability to continuously learn new information over their lifetime without losing previously acquired knowledge.

Domain Adaptation Hippocampus +2

Learning with Capsules: A Survey

no code implementations6 Jun 2022 Fabio De Sousa Ribeiro, Kevin Duarte, Miles Everett, Georgios Leontidis, Mubarak Shah

The aim of this survey is to provide a comprehensive overview of the capsule network research landscape, which will serve as a valuable resource for the community going forward.

Graph Representation Learning

EDLaaS: Fully Homomorphic Encryption Over Neural Network Graphs for Vision and Private Strawberry Yield Forecasting

no code implementations26 Oct 2021 George Onoufriou, Marc Hanheide, Georgios Leontidis

We present automatically parameterised Fully Homomorphic Encryption (FHE) for encrypted neural network inference and exemplify our inference over FHE compatible neural networks with our own open-source framework and reproducible examples.

Privacy Preserving

Fully Homomorphically Encrypted Deep Learning as a Service

1 code implementation26 Jul 2021 George Onoufriou, Paul Mayfield, Georgios Leontidis

Fully Homomorphic Encryption (FHE) is a relatively recent advancement in the field of privacy-preserving technologies.

Privacy Preserving

Hyperspherically Regularized Networks for Self-Supervision

no code implementations29 Apr 2021 Aiden Durrant, Georgios Leontidis

Bootstrap Your Own Latent (BYOL) introduced an approach to self-supervised learning avoiding the contrastive paradigm and subsequently removing the computational burden of negative sampling associated with such methods.

Self-Supervised Learning

The Role of Cross-Silo Federated Learning in Facilitating Data Sharing in the Agri-Food Sector

no code implementations14 Apr 2021 Aiden Durrant, Milan Markovic, David Matthews, David May, Jessica Enright, Georgios Leontidis

Data sharing remains a major hindering factor when it comes to adopting emerging AI technologies in general, but particularly in the agri-food sector.

BIG-bench Machine Learning Federated Learning +1

Contrastive Domain Adaptation

no code implementations26 Mar 2021 Mamatha Thota, Georgios Leontidis

Recently, contrastive self-supervised learning has become a key component for learning visual representations across many computer vision tasks and benchmarks.

Contrastive Learning Domain Adaptation +1

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 Hybrid Natural Language Generation System Integrating Rules and Deep Learning Algorithms

no code implementations15 Jun 2020 Wei Wei, Bei Zhou, Georgios Leontidis

This paper proposes an enhanced natural language generation system combining the merits of both rule-based approaches and modern deep learning algorithms, boosting its performance to the extent where the generated textual content is capable of exhibiting agile human-writing styles and the content logic of which is highly controllable.

Text Generation

Imputation of missing sub-hourly precipitation data in a large sensor network: a machine learning approach

no code implementations30 Mar 2020 Benedict Delahaye Chivers, John Wallbank, Steven J. Cole, Ondrej Sebek, Simon Stanley, Matthew Fry, Georgios Leontidis

Precipitation data collected at sub-hourly resolution represents specific challenges for missing data recovery by being largely stochastic in nature and highly unbalanced in the duration of rain vs non-rain.

BIG-bench Machine Learning Imputation

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

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

Nemesyst: A Hybrid Parallelism Deep Learning-Based Framework Applied for Internet of Things Enabled Food Retailing Refrigeration Systems

1 code implementation4 Jun 2019 George Onoufriou, Ronald Bickerton, Simon Pearson, Georgios Leontidis

Deep Learning has attracted considerable attention across multiple application domains, including computer vision, signal processing and natural language processing.

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

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.

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