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We propose a novel hierarchical Bayesian approach to Federated Learning (FL), where our model reasonably describes the generative process of clients' local data via hierarchical Bayesian modeling: constituting random variables of local…

Machine Learning · Computer Science 2026-03-03 Minyoung Kim , Timothy Hospedales

Federated learning (FL) takes a first step towards privacy-preserving machine learning by training models while keeping client data local. Models trained using FL may still leak private client information through model updates during…

Machine Learning · Computer Science 2023-01-18 Nasser Aldaghri , Hessam Mahdavifar , Ahmad Beirami

Current state-of-the-art deep learning based face recognition (FR) models require a large number of face identities for central training. However, due to the growing privacy awareness, it is prohibited to access the face images on user…

Computer Vision and Pattern Recognition · Computer Science 2022-03-22 Chih-Ting Liu , Chien-Yi Wang , Shao-Yi Chien , Shang-Hong Lai

Federated learning (FL) is an important technique for learning models from decentralized data in a privacy-preserving way. Existing FL methods usually uniformly sample clients for local model learning in each round. However, different…

Machine Learning · Computer Science 2023-06-27 Tao Qi , Fangzhao Wu , Lingjuan Lyu , Yongfeng Huang , Xing Xie

Federated learning (FL) is an appealing paradigm that allows a group of machines (a.k.a. clients) to learn collectively while keeping their data local. However, due to the heterogeneity between the clients' data distributions, the model…

Machine Learning · Computer Science 2024-10-01 Youssef Allouah , Abdellah El Mrini , Rachid Guerraoui , Nirupam Gupta , Rafael Pinot

Federated learning (FL) is a rapidly growing privacy-preserving collaborative machine learning paradigm. In practical FL applications, local data from each data silo reflect local usage patterns. Therefore, there exists heterogeneity of…

Machine Learning · Computer Science 2022-02-01 Shenglai Zeng , Zonghang Li , Hongfang Yu , Yihong He , Zenglin Xu , Dusit Niyato , Han Yu

Federated learning (FL) is a framework for training machine learning models in a distributed and collaborative manner. During training, a set of participating clients process their data stored locally, sharing only the model updates…

Machine Learning · Computer Science 2023-10-31 Filippo Galli , Kangsoo Jung , Sayan Biswas , Catuscia Palamidessi , Tommaso Cucinotta

Recent advancements in federated learning (FL) seek to increase client-level performance by fine-tuning client parameters on local data or personalizing architectures for the local task. Existing methods for such personalization either…

Machine Learning · Computer Science 2024-06-11 Rishub Tamirisa , John Won , Chengjun Lu , Ron Arel , Andy Zhou

Personalized Federated Learning (PFL) aims to learn personalized models for each client based on the knowledge across all clients in a privacy-preserving manner. Existing PFL methods generally assume that the underlying global data across…

Machine Learning · Computer Science 2023-03-28 Yang Lu , Pinxin Qian , Gang Huang , Hanzi Wang

Federated learning (FL) is a privacy-promoting framework that enables potentially large number of clients to collaboratively train machine learning models. In a FL system, a server coordinates the collaboration by collecting and aggregating…

Machine Learning · Computer Science 2023-04-21 Huancheng Chen , Haris Vikalo

Federated Learning (FL) has been a pivotal paradigm for collaborative training of machine learning models across distributed datasets. In heterogeneous settings, it has been observed that a single shared FL model can lead to low local…

Machine Learning · Computer Science 2025-06-02 Yifan Yang , Ali Payani , Parinaz Naghizadeh

Traditional Federated Learning (FL) methods encounter significant challenges when dealing with heterogeneous data and providing personalized solutions for non-IID scenarios. Personalized Federated Learning (PFL) approaches aim to address…

Machine Learning · Computer Science 2025-11-11 Yasaman Saadati , Mohammad Rostami , M. Hadi Amini

Knowledge sharing and model personalization are essential components to tackle the non-IID challenge in federated learning (FL). Most existing FL methods focus on two extremes: 1) to learn a shared model to serve all clients with non-IID…

Machine Learning · Computer Science 2022-06-08 Jie Ma , Guodong Long , Tianyi Zhou , Jing Jiang , Chengqi Zhang

The increasing size of data generated by smartphones and IoT devices motivated the development of Federated Learning (FL), a framework for on-device collaborative training of machine learning models. First efforts in FL focused on learning…

Machine Learning · Computer Science 2022-11-08 Othmane Marfoq , Giovanni Neglia , Aurélien Bellet , Laetitia Kameni , Richard Vidal

Federated Learning (FL) suffers significant performance degradation in real-world deployments characterized by moderate to extreme statistical heterogeneity (non-IID client data). While global aggregation strategies promote broad…

Machine Learning · Computer Science 2026-03-11 Prakash Kumbhakar , Shrey Srivastava , Haroon R Lone

Federated Learning provides a privacy-preserving paradigm for distributed learning, but suffers from statistical heterogeneity across clients. Personalized Federated Learning (PFL) mitigates this issue by considering client-specific models.…

Machine Learning · Statistics 2026-02-17 Ala Emrani , Amir Najafi , Abolfazl Motahari

Performance degradation owing to data heterogeneity and low output interpretability are the most significant challenges faced by federated learning in practical applications. Personalized federated learning diverges from traditional…

Machine Learning · Computer Science 2024-02-28 Mengen Luo , Chi Xu , Ercan Engin Kuruoglu

Federated Learning (FL) provides decentralised model training, which effectively tackles problems such as distributed data and privacy preservation. However, the generalisation of global models frequently faces challenges from data…

Machine Learning · Computer Science 2025-09-05 Ozgu Goksu , Nicolas Pugeault

Federated learning (FL) holds great potential for medical applications. However, statistical heterogeneity across healthcare institutions poses a major challenge for FL, as the global model struggles both to generalize across unseen patient…

Image and Video Processing · Electrical Eng. & Systems 2026-05-04 Zoe Fowler , Ghassan AlRegib

Federated learning is an emerging learning paradigm where multiple clients collaboratively train a machine learning model in a privacy-preserving manner. Personalized federated learning extends this paradigm to overcome heterogeneity across…

Machine Learning · Computer Science 2023-04-19 Hongxia Li , Zhongyi Cai , Jingya Wang , Jiangnan Tang , Weiping Ding , Chin-Teng Lin , Ye Shi