no code implementations • ECCV 2020 • Ioannis Marras, Grigorios G. Chrysos, Ioannis Alexiou, Gregory Slabaugh, Stefanos Zafeiriou
Deep Convolutional Neural Networks (CNNs) have been successfully used in many low-level vision problems like image denoising.
no code implementations • 10 Jul 2024 • Aggelina Chatziagapi, Grigorios G. Chrysos, Dimitris Samaras
We propose to construct a high-order tensor that combines all the learnable 3DGS parameters for all the training identities.
1 code implementation • 7 May 2024 • Elias Abad Rocamora, Yongtao Wu, Fanghui Liu, Grigorios G. Chrysos, Volkan Cevher
Adversarial attacks in Natural Language Processing apply perturbations in the character or token levels.
no code implementations • 29 Mar 2024 • Aggelina Chatziagapi, Grigorios G. Chrysos, Dimitris Samaras
In this work, we introduce a method that learns a single dynamic neural radiance field (NeRF) from monocular talking face videos of multiple identities.
no code implementations • 14 Mar 2024 • Yihang Chen, Fanghui Liu, Yiping Lu, Grigorios G. Chrysos, Volkan Cevher
To derive the generalization bounds under this setting, our analysis necessitates a shift from the conventional time-invariant Gram matrix employed in the lazy training regime to a time-variant, distribution-dependent version.
2 code implementations • 19 Feb 2024 • James Oldfield, Markos Georgopoulos, Grigorios G. Chrysos, Christos Tzelepis, Yannis Panagakis, Mihalis A. Nicolaou, Jiankang Deng, Ioannis Patras
The Mixture of Experts (MoE) paradigm provides a powerful way to decompose dense layers into smaller, modular computations often more amenable to human interpretation, debugging, and editability.
no code implementations • 14 Feb 2024 • Yixin Cheng, Markos Georgopoulos, Volkan Cevher, Grigorios G. Chrysos
Large Language Models (LLMs) are susceptible to Jailbreaking attacks, which aim to extract harmful information by subtly modifying the attack query.
1 code implementation • 31 Jan 2024 • Yixin Cheng, Grigorios G. Chrysos, Markos Georgopoulos, Volkan Cevher
On the other hand, Polynomial Networks is a class of models that does not require activation functions, but have yet to perform on par with modern architectures.
1 code implementation • 21 Jan 2024 • Elias Abad Rocamora, Fanghui Liu, Grigorios G. Chrysos, Pablo M. Olmos, Volkan Cevher
Our regularization term can be theoretically linked to curvature of the loss function and is computationally cheaper than previous methods by avoiding Double Backpropagation.
1 code implementation • 17 Feb 2023 • Thomas Pethick, Grigorios G. Chrysos, Volkan Cevher
Despite progress in adversarial training (AT), there is a substantial gap between the top-performing and worst-performing classes in many datasets.
1 code implementation • 17 Sep 2021 • Aleksandr Timofeev, Grigorios G. Chrysos, Volkan Cevher
The results demonstrate how the proposed method can be used in imbalanced datasets, while it can be fully run on a single GPU.
no code implementations • 7 Jul 2021 • Yannis Panagakis, Jean Kossaifi, Grigorios G. Chrysos, James Oldfield, Mihalis A. Nicolaou, Anima Anandkumar, Stefanos Zafeiriou
Tensors, or multidimensional arrays, are data structures that can naturally represent visual data of multiple dimensions.
no code implementations • 17 Jul 2020 • Grigorios G. Chrysos, Jean Kossaifi, Zhiding Yu, Anima Anandkumar
Instead, we propose an unsupervised framework to learn a distribution of latent codes that control the generator through self-training.
1 code implementation • CVPR 2020 • Grigorios G. Chrysos, Stylianos Moschoglou, Giorgos Bouritsas, Yannis Panagakis, Jiankang Deng, Stefanos Zafeiriou
Deep Convolutional Neural Networks (DCNNs) is currently the method of choice both for generative, as well as for discriminative learning in computer vision and machine learning.
2 code implementations • 8 Mar 2020 • Grigorios G. Chrysos, Stylianos Moschoglou, Giorgos Bouritsas, Yannis Panagakis, Jiankang Deng, Stefanos Zafeiriou
Deep Convolutional Neural Networks (DCNNs) is currently the method of choice both for generative, as well as for discriminative learning in computer vision and machine learning.
Ranked #1 on Graph Representation Learning on COMA
no code implementations • 11 Feb 2020 • Ioannis Marras, Grigorios G. Chrysos, Ioannis Alexiou, Gregory Slabaugh, Stefanos Zafeiriou
Deep Convolutional Neural Networks (CNNs) have been successfully used in many low-level vision problems like image denoising.
1 code implementation • ICLR 2019 • Grigorios G. Chrysos, Jean Kossaifi, Stefanos Zafeiriou
Conditional generative adversarial networks (cGAN) have led to large improvements in the task of conditional image generation, which lies at the heart of computer vision.
no code implementations • 8 Mar 2018 • Grigorios G. Chrysos, Paolo Favaro, Stefanos Zafeiriou
Notwithstanding, a much less standing mode of variation is motion deblurring, which however presents substantial challenges in face analysis.
no code implementations • 20 Jan 2018 • Grigorios G. Chrysos, Yannis Panagakis, Stefanos Zafeiriou
In addition, the state-of-the-art data-driven methods demand a vast amount of data, hence a standard engineering trick employed is artificial data augmentation for instance by adding into the data cropped and (affinely) transformed images.
no code implementations • 27 Apr 2017 • Grigorios G. Chrysos, Stefanos Zafeiriou
Blind deblurring consists a long studied task, however the outcomes of generic methods are not effective in real world blurred images.
1 code implementation • 18 Mar 2016 • Grigorios G. Chrysos, Epameinondas Antonakos, Patrick Snape, Akshay Asthana, Stefanos Zafeiriou
Recently, technologies such as face detection, facial landmark localisation and face recognition and verification have matured enough to provide effective and efficient solutions for imagery captured under arbitrary conditions (referred to as "in-the-wild").