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With growing concerns regarding data privacy and rapid increase in data volume, Federated Learning(FL) has become an important learning paradigm. However, jointly learning a deep neural network model in a FL setting proves to be a…

Machine Learning · Computer Science 2022-07-11 Disha Makhija , Xing Han , Nhat Ho , Joydeep Ghosh

In Federated Learning (FL), multiple clients collaborate to learn a shared model through a central server while keeping data decentralized. Personalized Federated Learning (PFL) further extends FL by learning a personalized model per…

Machine Learning · Computer Science 2022-10-25 Ohad Amosy , Gal Eyal , Gal Chechik

Personalized Federated Learning (PFL) constitutes a novel paradigm that tailors Machine Learning (ML) models to individual clients, thereby furnishing personalized model updates whilst upholding stringent data privacy principles. Diverging…

Computer Vision and Pattern Recognition · Computer Science 2026-05-28 Md. Arifur Rahman , Isha Das , Mushfiqur Rahman Abir , B. M. Taslimul Haque , Abdullah Al Noman , Abir Ahmed , Md. Jakir Hossen

Hyperparameter optimization (HPO) is crucial for machine learning algorithms to achieve satisfactory performance, whose progress has been boosted by related benchmarks. Nonetheless, existing efforts in benchmarking all focus on HPO for…

Machine Learning · Computer Science 2022-06-22 Zhen Wang , Weirui Kuang , Ce Zhang , Bolin Ding , Yaliang Li

Personalized Federated Learning (PFL) aims to address the statistical heterogeneity of data across clients by learning the personalized model for each client. Among various PFL approaches, the personalized aggregation-based approach…

Machine Learning · Computer Science 2025-10-09 Jiarui Song , Yunheng Shen , Chengbin Hou , Pengyu Wang , Jinbao Wang , Ke Tang , Hairong Lv

The traditional approach in FL tries to learn a single global model collaboratively with the help of many clients under the orchestration of a central server. However, learning a single global model might not work well for all clients…

Machine Learning · Computer Science 2021-05-11 Saeed Vahidian , Mahdi Morafah , Bill Lin

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 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

Federated Learning (FL) is a distributed machine learning (ML) paradigm, in which multiple clients collaboratively train ML models without centralizing their local data. Similar to conventional ML pipelines, the client local optimization…

Machine Learning · Computer Science 2024-07-24 Haokun Chen , Denis Krompass , Jindong Gu , Volker Tresp

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) has shown great potential as a privacy-preserving solution to learning from decentralized data that are only accessible to end devices (i.e., clients). In many scenarios, however, a large proportion of the clients…

Machine Learning · Computer Science 2022-01-31 Wentai Wu , Ligang He , Weiwei Lin , Carsten Maple

Federated Learning (FL) is designed as a decentralized, privacy-preserving machine learning paradigm that enables multiple clients to collaboratively train a model without sharing their data. In real-world scenarios, however, clients often…

Machine Learning · Computer Science 2025-10-17 Maulidi Adi Prasetia , Muhamad Risqi U. Saputra , Guntur Dharma Putra

Federated learning (FL) has been widely adopted for collaborative training on decentralized data. However, it faces the challenges of data, system, and model heterogeneity. This has inspired the emergence of model-heterogeneous personalized…

Machine Learning · Computer Science 2024-02-13 Liping Yi , Han Yu , Chao Ren , Heng Zhang , Gang Wang , Xiaoguang Liu , Xiaoxiao Li

Federated Learning (FL) enables collaborative training of distributed clients while protecting privacy. To enhance generalization capability in FL, prototype-based FL is in the spotlight, since shared global prototypes offer semantic…

Computer Vision and Pattern Recognition · Computer Science 2026-05-21 Huan Wang , Jun Shen , Haoran Li , Zhenyu Yang , Jun Yan , Ousman Manjang , Yanlong Zhai , Di Wu , Guansong Pang

Federated Learning (FL) enables collaborative training without centralizing data, essential for privacy compliance in real-world scenarios involving sensitive visual information. Most FL approaches rely on expensive, iterative deep network…

Computer Vision and Pattern Recognition · Computer Science 2026-02-16 Alejandro Dopico-Castro , Oscar Fontenla-Romero , Bertha Guijarro-Berdiñas , Amparo Alonso-Betanzos , Iván Pérez Digón

Heterogeneity across clients in federated learning (FL) usually hinders the optimization convergence and generalization performance when the aggregation of clients' knowledge occurs in the gradient space. For example, clients may differ in…

Machine Learning · Computer Science 2022-03-08 Yue Tan , Guodong Long , Lu Liu , Tianyi Zhou , Qinghua Lu , Jing Jiang , Chengqi Zhang

Federated Learning (FL) decouples model training from the need for direct access to the data and allows organizations to collaborate with industry partners to reach a satisfying level of performance without sharing vulnerable business…

Machine Learning · Computer Science 2021-10-22 Stephanie Holly , Thomas Hiessl , Safoura Rezapour Lakani , Daniel Schall , Clemens Heitzinger , Jana Kemnitz

Traditional Federated Learning (FL) approaches often struggle with data heterogeneity across clients, leading to suboptimal model performance for individual clients. To address this issue, Personalized Federated Learning (PFL) emerges as a…

Machine Learning · Computer Science 2025-01-20 Zhou Ni , Masoud Ghazikor , Morteza Hashemi

Personalized federated learning (PFL) is a popular framework that allows clients to have different models to address application scenarios where clients' data are in different domains. The typical model of a client in PFL features a global…

Machine Learning · Computer Science 2023-07-27 Guogang Zhu , Xuefeng Liu , Shaojie Tang , Jianwei Niu , Xinghao Wu , Jiaxing Shen

Federated learning is a privacy-preserving machine learning technique that learns a shared model across decentralized clients. It can alleviate privacy concerns of personal re-identification, an important computer vision task. In this work,…

Computer Vision and Pattern Recognition · Computer Science 2020-10-12 Weiming Zhuang , Yonggang Wen , Xuesen Zhang , Xin Gan , Daiying Yin , Dongzhan Zhou , Shuai Zhang , Shuai Yi