Search Results for author: Charalambos Poullis

Found 12 papers, 6 papers with code

TransGlow: Attention-augmented Transduction model based on Graph Neural Networks for Water Flow Forecasting

no code implementations10 Dec 2023 Naghmeh Shafiee Roudbari, Charalambos Poullis, Zachary Patterson, Ursula Eicker

Since water systems are interconnected and the connectivity information between the stations is implicit, the proposed model leverages a graph learning module to extract a sparse graph adjacency matrix adaptively based on the data.

Graph Learning

Efficient Deduplication and Leakage Detection in Large Scale Image Datasets with a focus on the CrowdAI Mapping Challenge Dataset

1 code implementation5 Apr 2023 Yeshwanth Kumar Adimoolam, Bodhiswatta Chatterjee, Charalambos Poullis, Melinos Averkiou

The CrowdAI Mapping Challenge Dataset is one of these datasets that has been used extensively in recent years to train deep neural networks.

End-to-End Multi-View Structure-from-Motion with Hypercorrelation Volumes

no code implementations14 Sep 2022 Qiao Chen, Charalambos Poullis

Image-based 3D reconstruction is one of the most important tasks in Computer Vision with many solutions proposed over the last few decades.

3D Reconstruction Multi-View 3D Reconstruction

Simpler is better: Multilevel Abstraction with Graph Convolutional Recurrent Neural Network Cells for Traffic Prediction

1 code implementation8 Sep 2022 Naghmeh Shafiee Roudbari, Zachary Patterson, Ursula Eicker, Charalambos Poullis

In recent years, graph neural networks (GNNs) combined with variants of recurrent neural networks (RNNs) have reached state-of-the-art performance in spatiotemporal forecasting tasks.

Traffic Prediction

Unsupervised Structure-Consistent Image-to-Image Translation

no code implementations24 Aug 2022 Shima Shahfar, Charalambos Poullis

The Swapping Autoencoder achieved state-of-the-art performance in deep image manipulation and image-to-image translation.

Attribute Disentanglement +4

Motion Estimation for Large Displacements and Deformations

no code implementations24 Jun 2022 Qiao Chen, Charalambos Poullis

Variational optical flow techniques based on a coarse-to-fine scheme interpolate sparse matches and locally optimize an energy model conditioned on colour, gradient and smoothness, making them sensitive to noise in the sparse matches, deformations, and arbitrarily large displacements.

Graph Matching Motion Estimation +2

Adaptive Memory Management for Video Object Segmentation

1 code implementation13 Apr 2022 Ali Pourganjalikhan, Charalambos Poullis

Matching-based networks have achieved state-of-the-art performance for video object segmentation (VOS) tasks by storing every-k frames in an external memory bank for future inference.

Management Object +4

Multi-view Gradient Consistency for SVBRDF Estimation of Complex Scenes under Natural Illumination

1 code implementation25 Feb 2022 Alen Joy, Charalambos Poullis

In contrast to previous methods, our process is not limited to scenes viewed under controlled lighting conditions but can handle complex indoor and outdoor scenes viewed under arbitrary illumination conditions.

Disentanglement Image Reconstruction +1

Predicting Surface Reflectance Properties of Outdoor Scenes Under Unknown Natural Illumination

no code implementations14 May 2021 Farhan Rahman Wasee, Alen Joy, Charalambos Poullis

Estimating and modelling the appearance of an object under outdoor illumination conditions is a complex process.

Multi-label Pixelwise Classification for Reconstruction of Large-scale Urban Areas

no code implementations21 Sep 2017 Yuanlie He, Sudhir Mudur, Charalambos Poullis

In fact, for single-label object classification [i. e. only one object present in the image] the state-of-the-art techniques employ deep neural networks and are reporting very close to human-like performance.

Classification General Classification +1

3DUNDERWORLD-SLS: An Open-Source Structured-Light Scanning System for Rapid Geometry Acquisition

1 code implementation25 Jun 2014 Qing Gu, Kyriakos Herakleous, Charalambos Poullis

Recently, there has been an increase in the demand of virtual 3D objects representing real-life objects.

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