Search Results for author: Vasileios Argyriou

Found 26 papers, 8 papers with code

Latent Bernoulli Autoencoder

1 code implementation ICML 2020 Jiri Fajtl, Vasileios Argyriou, Dorothy Monekosso, Paolo Remagnino

In this work, we pose a question whether it is possible to design and train an autoencoder model in an end-to-end fashion to learn latent representations in multivariate Bernoulli space, and achieve performance comparable with the current state-of-the-art variational methods.

Dynamic Distinction Learning: Adaptive Pseudo Anomalies for Video Anomaly Detection

2 code implementations7 Apr 2024 Demetris Lappas, Vasileios Argyriou, Dimitrios Makris

We introduce Dynamic Distinction Learning (DDL) for Video Anomaly Detection, a novel video anomaly detection methodology that combines pseudo-anomalies, dynamic anomaly weighting, and a distinction loss function to improve detection accuracy.

Anomaly Detection Video Anomaly Detection

DiffusionAct: Controllable Diffusion Autoencoder for One-shot Face Reenactment

no code implementations25 Mar 2024 Stella Bounareli, Christos Tzelepis, Vasileios Argyriou, Ioannis Patras, Georgios Tzimiropoulos

To this end, in this paper we present DiffusionAct, a novel method that leverages the photo-realistic image generation of diffusion models to perform neural face reenactment.

Face Reenactment Image Generation

An AI-Assisted Skincare Routine Recommendation System in XR

no code implementations20 Mar 2024 Gowravi Malalur Rajegowda, Yannis Spyridis, Barbara Villarini, Vasileios Argyriou

This data is then used to train the CNN model, which recognises the skin type and existing issues and allows the recommendation engine to suggest personalised skin care products.

One-shot Neural Face Reenactment via Finding Directions in GAN's Latent Space

no code implementations5 Feb 2024 Stella Bounareli, Christos Tzelepis, Vasileios Argyriou, Ioannis Patras, Georgios Tzimiropoulos

Moreover, we show that by embedding real images in the GAN latent space, our method can be successfully used for the reenactment of real-world faces.

Disentanglement Face Reenactment

HyperReenact: One-Shot Reenactment via Jointly Learning to Refine and Retarget Faces

1 code implementation ICCV 2023 Stella Bounareli, Christos Tzelepis, Vasileios Argyriou, Ioannis Patras, Georgios Tzimiropoulos

In this paper, we present our method for neural face reenactment, called HyperReenact, that aims to generate realistic talking head images of a source identity, driven by a target facial pose.

Face Reenactment

Evaluation of Environmental Conditions on Object Detection using Oriented Bounding Boxes for AR Applications

no code implementations29 Jun 2023 Vladislav Li, Barbara Villarini, Jean-Christophe Nebel, Thomas Lagkas, Panagiotis Sarigiannidis, Vasileios Argyriou

The objective of augmented reality (AR) is to add digital content to natural images and videos to create an interactive experience between the user and the environment.

object-detection Object Detection +1

StyleMask: Disentangling the Style Space of StyleGAN2 for Neural Face Reenactment

1 code implementation27 Sep 2022 Stella Bounareli, Christos Tzelepis, Vasileios Argyriou, Ioannis Patras, Georgios Tzimiropoulos

In this paper we address the problem of neural face reenactment, where, given a pair of a source and a target facial image, we need to transfer the target's pose (defined as the head pose and its facial expressions) to the source image, by preserving at the same time the source's identity characteristics (e. g., facial shape, hair style, etc), even in the challenging case where the source and the target faces belong to different identities.

Disentanglement Face Reenactment

Finding Directions in GAN's Latent Space for Neural Face Reenactment

1 code implementation31 Jan 2022 Stella Bounareli, Vasileios Argyriou, Georgios Tzimiropoulos

Moreover, we show that by embedding real images in the GAN latent space, our method can be successfully used for the reenactment of real-world faces.

Disentanglement Face Reenactment

Content-aware Density Map for Crowd Counting and Density Estimation

no code implementations17 Jun 2019 Mahdi Maktabdar Oghaz, Anish R. Khadka, Vasileios Argyriou, Paolo Remagnino

Precise knowledge about the size of a crowd, its density and flow can provide valuable information for safety and security applications, event planning, architectural design and to analyze consumer behavior.

Crowd Counting Density Estimation

Iterative Self-Learning: Semi-Supervised Improvement to Dataset Volumes and Model Accuracy

no code implementations6 Jun 2019 Robert Dupre, Jiri Fajtl, Vasileios Argyriou, Paolo Remagnin

A novel semi-supervised learning technique is introduced based on a simple iterative learning cycle together with learned thresholding techniques and an ensemble decision support system.

Classification General Classification +2

Semi-supervised GAN for Classification of Multispectral Imagery Acquired by UAVs

no code implementations24 May 2019 Hamideh Kerdegari, Manzoor Razaak, Vasileios Argyriou, Paolo Remagnino

The results by the proposed semi-supervised GAN achieves high classification accuracy and demonstrates the potential of GAN-based methods for the challenging task of multispectral image classification.

Classification General Classification +1

Features Extraction Based on an Origami Representation of 3D Landmarks

no code implementations12 Dec 2018 Juan Manuel Fernandez Montenegro, Mahdi Maktab Dar Oghaz, Athanasios Gkelias, Georgios Tzimiropoulos, Vasileios Argyriou

The performance evaluation demonstrates an improvement on facial emotion classification (accuracy and F1 score) that indicates the superiority of the proposed methodology.

Classification Emotion Classification +1

A Comparison of Embedded Deep Learning Methods for Person Detection

no code implementations9 Dec 2018 Chloe Eunhyang Kim, Mahdi Maktab Dar Oghaz, Jiri Fajtl, Vasileios Argyriou, Paolo Remagnino

Recent advancements in parallel computing, GPU technology and deep learning provide a new platform for complex image processing tasks such as person detection to flourish.

Human Detection

Summarizing Videos with Attention

4 code implementations5 Dec 2018 Jiri Fajtl, Hajar Sadeghi Sokeh, Vasileios Argyriou, Dorothy Monekosso, Paolo Remagnino

In this work we propose a novel method for supervised, keyshots based video summarization by applying a conceptually simple and computationally efficient soft, self-attention mechanism.

Ranked #3 on Video Summarization on TvSum (using extra training data)

Object 3D Reconstruction based on Photometric Stereo and Inverted Rendering

no code implementations6 Nov 2018 Anish R. Khadka, Paolo Remagnino, Vasileios Argyriou

Our suggested approach is to recover scene properties in the presence of indirect illumination.

3D Reconstruction

Machine learning architectures to predict motion sickness using a Virtual Reality rollercoaster simulation tool

no code implementations2 Nov 2018 Stefan Hell, Vasileios Argyriou

An application that lets users create rollercoasters directly in VR, share them with other users and ride and rate them is used to gather real-time data related to the in-game behaviour of the player, the track itself and users' ratings based on a Simulator Sickness Questionnaire (SSQ) integrated into the application.

BIG-bench Machine Learning

Superframes, A Temporal Video Segmentation

no code implementations18 Apr 2018 Hajar Sadeghi Sokeh, Vasileios Argyriou, Dorothy Monekosso, Paolo Remagnino

The goal of video segmentation is to turn video data into a set of concrete motion clusters that can be easily interpreted as building blocks of the video.

Clustering Motion Estimation +4

AMNet: Memorability Estimation with Attention

1 code implementation CVPR 2018 Jiri Fajtl, Vasileios Argyriou, Dorothy Monekosso, Paolo Remagnino

Further on we study the impact of the attention mechanism on the memorability estimation and evaluate our network on the SUN Memorability and the LaMem datasets.

General Classification Image Classification +1

A Human and Group Behaviour Simulation Evaluation Framework utilising Composition and Video Analysis

no code implementations9 Jul 2017 Rob Dupre, Vasileios Argyriou

In this work we present the modular Crowd Simulation Evaluation through Composition framework (CSEC) which provides a quantitative comparison between different pedestrian and crowd simulation approaches.

Large Pose 3D Face Reconstruction from a Single Image via Direct Volumetric CNN Regression

1 code implementation ICCV 2017 Aaron S. Jackson, Adrian Bulat, Vasileios Argyriou, Georgios Tzimiropoulos

Our CNN works with just a single 2D facial image, does not require accurate alignment nor establishes dense correspondence between images, works for arbitrary facial poses and expressions, and can be used to reconstruct the whole 3D facial geometry (including the non-visible parts of the face) bypassing the construction (during training) and fitting (during testing) of a 3D Morphable Model.

3D Face Reconstruction Face Alignment +1

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