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Data heterogeneity is an inherent challenge that hinders the performance of federated learning (FL). Recent studies have identified the biased classifiers of local models as the key bottleneck. Previous attempts have used classifier…

Machine Learning · Computer Science 2023-08-29 Zexi Li , Xinyi Shang , Rui He , Tao Lin , Chao Wu

In this paper, we present \textbf{\textit{FasterCache}}, a novel training-free strategy designed to accelerate the inference of video diffusion models with high-quality generation. By analyzing existing cache-based methods, we observe that…

Computer Vision and Pattern Recognition · Computer Science 2025-03-13 Zhengyao Lv , Chenyang Si , Junhao Song , Zhenyu Yang , Yu Qiao , Ziwei Liu , Kwan-Yee K. Wong

Federated learning (FL) provides a privacy-preserving solution for distributed machine learning tasks. One challenging problem that severely damages the performance of FL models is the co-occurrence of data heterogeneity and long-tail…

Machine Learning · Computer Science 2022-04-29 Xinyi Shang , Yang Lu , Gang Huang , Hanzi Wang

One well motivated explanation method for classifiers leverages counterfactuals which are hypothetical events identical to real observations in all aspects except for one feature. Constructing such counterfactual poses specific challenges…

Machine Learning · Computer Science 2024-09-12 Pirmin Lemberger , Antoine Saillenfest

Counterfactual explanations promote explainability in machine learning models by answering the question "how should an input instance be perturbed to obtain a desired predicted label?". The comparison of this instance before and after…

Machine Learning · Computer Science 2022-11-09 Jing Ma , Ruocheng Guo , Saumitra Mishra , Aidong Zhang , Jundong Li

Variational autoencoders (VAEs) and other generative methods have garnered growing interest not just for their generative properties but also for the ability to dis-entangle a low-dimensional latent variable space. However, few existing…

Machine Learning · Computer Science 2023-02-14 Sunay Bhat , Jeffrey Jiang , Omead Pooladzandi , Gregory Pottie

Image captioning, a popular topic in computer vision, has achieved substantial progress in recent years. However, the distinctiveness of natural descriptions is often overlooked in previous work. It is closely related to the quality of…

Computer Vision and Pattern Recognition · Computer Science 2017-10-10 Bo Dai , Dahua Lin

We propose a way to learn visual features that are compatible with previously computed ones even when they have different dimensions and are learned via different neural network architectures and loss functions. Compatible means that, if…

Computer Vision and Pattern Recognition · Computer Science 2021-01-07 Yantao Shen , Yuanjun Xiong , Wei Xia , Stefano Soatto

Counterfactual explanations provide actionable insights to achieve desired outcomes by suggesting minimal changes to input features. However, existing methods rely on fixed sets of mutable features, which makes counterfactual explanations…

Machine Learning · Computer Science 2025-02-26 Stig Hellemans , Andres Algaba , Sam Verboven , Vincent Ginis

As machine learning (ML) algorithms are used in applications that involve humans, concerns have arisen that these algorithms may be biased against certain social groups. \textit{Counterfactual fairness} (CF) is a fairness notion proposed in…

Machine Learning · Computer Science 2024-12-03 Zhiqun Zuo , Tian Xie , Xuwei Tan , Xueru Zhang , Mohammad Mahdi Khalili

Modern video codecs and learning-based approaches struggle for semantic reconstruction at extremely low bit-rates due to reliance on low-level spatiotemporal redundancies. Generative models, especially diffusion models, offer a new paradigm…

Image and Video Processing · Electrical Eng. & Systems 2026-02-06 Maojun Zhang , Haotian Wu , Richeng Jin , Deniz Gunduz , Krystian Mikolajczyk

Despite the success of complex machine learning algorithms, mostly justified by an outstanding performance in prediction tasks, their inherent opaque nature still represents a challenge to their responsible application. Counterfactual…

Machine Learning · Computer Science 2023-06-13 Bjorge Meulemeester , Raphael Mazzine Barbosa De Oliveira , David Martens

Learning visual feature representations for video analysis is a daunting task that requires a large amount of training samples and a proper generalization framework. Many of the current state of the art methods for video captioning and…

Machine Learning · Computer Science 2018-09-20 Oliver Nina , Washington Garcia , Scott Clouse , Alper Yilmaz

The rapid advancement of generative AI models capable of creating realistic media has led to a need for classifiers that can accurately distinguish between genuine and artificially-generated images. A significant challenge for these…

Computer Vision and Pattern Recognition · Computer Science 2025-01-22 William Doherty , Anton Lee , Heitor Murilo Gomes

In this study, we propose a feature extraction framework based on contrastive learning with adaptive positive and negative samples (CL-FEFA) that is suitable for unsupervised, supervised, and semi-supervised single-view feature extraction.…

Machine Learning · Computer Science 2022-01-12 Hongjie Zhang

The application of counterfactual explanation (CE) techniques in the realm of electroencephalography (EEG) classification has been relatively infrequent in contemporary research. In this study, we attempt to introduce and explore a novel…

Signal Processing · Electrical Eng. & Systems 2023-12-18 Kang Yin , Hye-Bin Shin , Hee-Dong Kim , Seong-Whan Lee

Deep learning methods are powerful tools but often suffer from expensive computation and limited flexibility. An alternative is to combine light-weight models with deep representations. As successful cases exist in several visual problems,…

Computer Vision and Pattern Recognition · Computer Science 2015-09-25 Bin Yang , Junjie Yan , Zhen Lei , Stan Z. Li

Contextual information plays a core role for video semantic segmentation (VSS). This paper summarizes contexts for VSS in two-fold: local temporal contexts (LTC) which define the contexts from neighboring frames, and global temporal…

Computer Vision and Pattern Recognition · Computer Science 2024-04-10 Guolei Sun , Yun Liu , Henghui Ding , Min Wu , Luc Van Gool

In this paper, we demonstrate the feasibility of alterfactual explanations for black box image classifiers. Traditional explanation mechanisms from the field of Counterfactual Thinking are a widely-used paradigm for Explainable Artificial…

Computer Vision and Pattern Recognition · Computer Science 2024-05-10 Silvan Mertes , Tobias Huber , Christina Karle , Katharina Weitz , Ruben Schlagowski , Cristina Conati , Elisabeth André

Contrastive pretraining is well-known to improve downstream task performance and model generalisation, especially in limited label settings. However, it is sensitive to the choice of augmentation pipeline. Positive pairs should preserve…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Melanie Roschewitz , Fabio De Sousa Ribeiro , Tian Xia , Galvin Khara , Ben Glocker