Search Results for author: Grigorios Chrysos

Found 14 papers, 4 papers with code

Learning to Remove Cuts in Integer Linear Programming

1 code implementation26 Jun 2024 Pol Puigdemont, Stratis Skoulakis, Grigorios Chrysos, Volkan Cevher

Cutting plane methods are a fundamental approach for solving integer linear programs (ILPs).

Combinatorial Optimization

Going beyond Compositions, DDPMs Can Produce Zero-Shot Interpolations

1 code implementation29 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.

Denoising Image Generation

Federated Learning under Covariate Shifts with Generalization Guarantees

no code implementations8 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.

Federated Learning

A Rate-Distortion Approach to Domain Generalization

no code implementations29 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.

Contrastive Learning Domain Generalization

Protect the weak: Class focused online learning for adversarial training

no code implementations29 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.

Poly-NL: Linear Complexity Non-local Layers with Polynomials

no code implementations6 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.

Face Detection Instance Segmentation +1

MVP: Multivariate polynomials for conditional generation

no code implementations1 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.

Conditional Image Generation Image-to-Image Translation +1

Poly-NL: Linear Complexity Non-Local Layers With 3rd Order Polynomials

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.

Face Detection Instance Segmentation +1

Multilinear Latent Conditioning for Generating Unseen Attribute Combinations

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.

Attribute Inductive Bias

Deep Polynomial Neural Networks

5 code implementations20 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.

Conditional Image Generation Face Identification +4

PolyGAN: High-Order Polynomial Generators

no code implementations19 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.

Vocal Bursts Intensity Prediction

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