Search Results for author: Nikolaos Dionelis

Found 8 papers, 4 papers with code

A Semantic Segmentation-guided Approach for Ground-to-Aerial Image Matching

2 code implementations17 Apr 2024 Francesco Pro, Nikolaos Dionelis, Luca Maiano, Bertrand Le Saux, Irene Amerini

Nowadays the accurate geo-localization of ground-view images has an important role across domains as diverse as journalism, forensics analysis, transports, and Earth Observation.

Earth Observation Semantic Segmentation

Learning from Unlabelled Data with Transformers: Domain Adaptation for Semantic Segmentation of High Resolution Aerial Images

1 code implementation17 Apr 2024 Nikolaos Dionelis, Francesco Pro, Luca Maiano, Irene Amerini, Bertrand Le Saux

In this paper, we develop a new model for semantic segmentation of unlabelled images, the Non-annotated Earth Observation Semantic Segmentation (NEOS) model.

Domain Adaptation Earth Observation +2

PhilEO Bench: Evaluating Geo-Spatial Foundation Models

1 code implementation9 Jan 2024 Casper Fibaek, Luke Camilleri, Andreas Luyts, Nikolaos Dionelis, Bertrand Le Saux

Massive amounts of unlabelled data are captured by Earth Observation (EO) satellites, with the Sentinel-2 constellation generating 1. 6 TB of data daily.

Density Estimation Earth Observation +3

FROB: Few-shot ROBust Model for Classification and Out-of-Distribution Detection

no code implementations30 Nov 2021 Nikolaos Dionelis, Mehrdad Yaghoobi, Sotirios A. Tsaftaris

By including our boundary, FROB reduces the threshold linked to the model's few-shot robustness; it maintains the OoD performance approximately independent of the number of few-shots.

One-Class Classification Out-of-Distribution Detection +2

OMASGAN: Out-of-Distribution Minimum Anomaly Score GAN for Sample Generation on the Boundary

1 code implementation28 Oct 2021 Nikolaos Dionelis, Mehrdad Yaghoobi, Sotirios A. Tsaftaris

OMASGAN addresses the rarity of anomalies by generating strong and adversarial OoD samples on the distribution boundary using only normal class data, effectively addressing mode collapse.

Anomaly Detection Data Augmentation +2

FROB: Few-shot ROBust Model for Classification with Out-of-Distribution Detection

no code implementations29 Sep 2021 Nikolaos Dionelis, Mehrdad Yaghoobi, Sotirios A. Tsaftaris

We propose a self-supervised learning few-shot confidence boundary methodology based on generative and discriminative models, including classification.

One-Class Classification Out-of-Distribution Detection +2

Tail of Distribution GAN (TailGAN): Generative-Adversarial-Network-Based Boundary Formation

no code implementations24 Jul 2021 Nikolaos Dionelis, Mehrdad Yaghoobi, Sotirios A. Tsaftaris

In this paper, we create a GAN-based tail formation model for anomaly detection, the Tail of distribution GAN (TailGAN), to generate samples on the tail of the data distribution and detect anomalies near the support boundary.

Generative Adversarial Network Unsupervised Anomaly Detection

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