no code implementations • 27 Nov 2024 • Daniel Morales-Brotons, Grigorios Chrysos, Stratis Tzoumas, Volkan Cevher
To address this, we study the promising setting of Semi-Supervised Domain Adaptation (SSDA).
1 code implementation • 26 Jun 2024 • Pol Puigdemont, Stratis Skoulakis, Grigorios Chrysos, Volkan Cevher
Cutting plane methods are a fundamental approach for solving integer linear programs (ILPs).
1 code implementation • 29 May 2024 • Justin Deschenaux, Igor Krawczuk, Grigorios Chrysos, Volkan Cevher
In this work, we go further and study DDPMs trained on strictly separate subsets of the data distribution with large gaps on the support of the latent factors.
no code implementations • 8 Jun 2023 • Ali Ramezani-Kebrya, Fanghui Liu, Thomas Pethick, Grigorios Chrysos, Volkan Cevher
This paper addresses intra-client and inter-client covariate shifts in federated learning (FL) with a focus on the overall generalization performance.
no code implementations • ICLR 2022 • Moulik Choraria, Leello Tadesse Dadi, Grigorios Chrysos, Julien Mairal, Volkan Cevher
Inspired by such studies, we conduct a spectral analysis of the Neural Tangent Kernel (NTK) of PNNs.
1 code implementation • NeurIPS 2021 • Grigorios Chrysos, Markos Georgopoulos, Yannis Panagakis
We exhibit how CoPE can be trivially augmented to accept an arbitrary number of input variables.
no code implementations • 29 Sep 2021 • Yihang Chen, Grigorios Chrysos, Volkan Cevher
Domain generalization deals with the difference in the distribution between the training and testing datasets, i. e., the domain shift problem, by extracting domain-invariant features.
no code implementations • 29 Sep 2021 • Thomas Pethick, Grigorios Chrysos, Volkan Cevher
In this work, we identify that the focus on the average accuracy metric can create vulnerabilities to the "weakest" class.
no code implementations • 6 Jul 2021 • Francesca Babiloni, Ioannis Marras, Filippos Kokkinos, Jiankang Deng, Grigorios Chrysos, Stefanos Zafeiriou
Spatial self-attention layers, in the form of Non-Local blocks, introduce long-range dependencies in Convolutional Neural Networks by computing pairwise similarities among all possible positions.
Ranked #1 on Face Detection on WIDER Face (Hard)
no code implementations • 1 Jan 2021 • Grigorios Chrysos, Yannis Panagakis
The conditional variable can be discrete (e. g., a class label) or continuous (e. g., an input image) resulting into class-conditional (image) generation and image-to-image translation models, respectively.
no code implementations • ICCV 2021 • Francesca Babiloni, Ioannis Marras, Filippos Kokkinos, Jiankang Deng, Grigorios Chrysos, Stefanos Zafeiriou
Spatial self-attention layers, in the form of Non-Local blocks, introduce long-range dependencies in Convolutional Neural Networks by computing pairwise similarities among all possible positions.
no code implementations • ICML 2020 • Markos Georgopoulos, Grigorios Chrysos, Maja Pantic, Yannis Panagakis
Deep generative models rely on their inductive bias to facilitate generalization, especially for problems with high dimensional data, like images.
5 code implementations • 20 Jun 2020 • Grigorios Chrysos, Stylianos Moschoglou, Giorgos Bouritsas, Jiankang Deng, Yannis Panagakis, Stefanos Zafeiriou
We introduce three tensor decompositions that significantly reduce the number of parameters and show how they can be efficiently implemented by hierarchical neural networks.
Ranked #1 on Face Recognition on CALFW
no code implementations • 19 Aug 2019 • Grigorios Chrysos, Stylianos Moschoglou, Yannis Panagakis, Stefanos Zafeiriou
Generative Adversarial Networks (GANs) have become the gold standard when it comes to learning generative models for high-dimensional distributions.