Search Results for author: James Oldfield

Found 9 papers, 5 papers with code

Multilinear Mixture of Experts: Scalable Expert Specialization through Factorization

1 code implementation19 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 inscrutable dense layers into smaller, modular computations often more amenable to human interpretation, debugging, and editability.

Attribute counterfactual

Parts of Speech-Grounded Subspaces in Vision-Language Models

2 code implementations23 May 2023 James Oldfield, Christos Tzelepis, Yannis Panagakis, Mihalis A. Nicolaou, Ioannis Patras

Latent image representations arising from vision-language models have proved immensely useful for a variety of downstream tasks.

Image Generation POS +1

ContraCLIP: Interpretable GAN generation driven by pairs of contrasting sentences

1 code implementation5 Jun 2022 Christos Tzelepis, James Oldfield, Georgios Tzimiropoulos, Ioannis Patras

This work addresses the problem of discovering non-linear interpretable paths in the latent space of pre-trained GANs in a model-agnostic manner.

Position

PandA: Unsupervised Learning of Parts and Appearances in the Feature Maps of GANs

1 code implementation31 May 2022 James Oldfield, Christos Tzelepis, Yannis Panagakis, Mihalis A. Nicolaou, Ioannis Patras

Recent advances in the understanding of Generative Adversarial Networks (GANs) have led to remarkable progress in visual editing and synthesis tasks, capitalizing on the rich semantics that are embedded in the latent spaces of pre-trained GANs.

Cluster-guided Image Synthesis with Unconditional Models

no code implementations CVPR 2022 Markos Georgopoulos, James Oldfield, Grigorios G Chrysos, Yannis Panagakis

The results highlight the ability of our approach to condition image generation on attributes like gender, pose and hair style on faces, as well as a variety of features on different object classes.

Image Generation

Tensor Component Analysis for Interpreting the Latent Space of GANs

no code implementations23 Nov 2021 James Oldfield, Markos Georgopoulos, Yannis Panagakis, Mihalis A. Nicolaou, Ioannis Patras

This paper addresses the problem of finding interpretable directions in the latent space of pre-trained Generative Adversarial Networks (GANs) to facilitate controllable image synthesis.

Image Generation

Tensor Methods in Computer Vision and Deep Learning

no code implementations7 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.

Representation Learning

Enhancing Facial Data Diversity with Style-based Face Aging

no code implementations6 Jun 2020 Markos Georgopoulos, James Oldfield, Mihalis A. Nicolaou, Yannis Panagakis, Maja Pantic

By evaluating on several age-annotated datasets in both single- and cross-database experiments, we show that the proposed method outperforms state-of-the-art algorithms for age transfer, especially in the case of age groups that lie in the tails of the label distribution.

Data Augmentation

Adversarial Learning of Disentangled and Generalizable Representations for Visual Attributes

1 code implementation9 Apr 2019 James Oldfield, Yannis Panagakis, Mihalis A. Nicolaou

Recently, a multitude of methods for image-to-image translation have demonstrated impressive results on problems such as multi-domain or multi-attribute transfer.

Attribute Image-to-Image Translation +1

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