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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

Person re-identification (ReID) is aimed at identifying the same person across videos captured from different cameras. In the view that networks extracting global features using ordinary network architectures are difficult to extract local…

Computer Vision and Pattern Recognition · Computer Science 2018-11-21 Pengyuan Ren , Jianmin Li

Person re-identification (ReID) aims at re-identifying persons from different viewpoints across multiple cameras, of which it is of great importance to learn multifaceted features expressed in different parts of a person, e.g., clothes,…

Computer Vision and Pattern Recognition · Computer Science 2019-11-25 Cheng Yan , Guansong Pang , Xiao Bai , Chunhua Shen

Unsupervised person re-identification (ReID) aims to train a feature extractor for identity retrieval without exploiting identity labels. Due to the blind trust in imperfect clustering results, the learning is inevitably misled by…

Computer Vision and Pattern Recognition · Computer Science 2022-11-23 Yunqi Miao , Jiankang Deng , Guiguang Ding , Jungong Han

Unsupervised federated learning (UFL) has gained attention as a privacy-preserving, decentralized machine learning approach that eliminates the need for labor-intensive data labeling. However, UFL faces several challenges in practical…

Machine Learning · Computer Science 2025-08-19 You Hak Lee , Xiaofan Yu , Quanling Zhao , Flavio Ponzina , Tajana Rosing

Although unsupervised person re-identification (RE-ID) has drawn increasing research attentions due to its potential to address the scalability problem of supervised RE-ID models, it is very challenging to learn discriminative information…

Computer Vision and Pattern Recognition · Computer Science 2019-04-09 Hong-Xing Yu , Wei-Shi Zheng , Ancong Wu , Xiaowei Guo , Shaogang Gong , Jian-Huang Lai

Lifelong person re-identification (LReID) is in significant demand for real-world development as a large amount of ReID data is captured from diverse locations over time and cannot be accessed at once inherently. However, a key challenge…

Computer Vision and Pattern Recognition · Computer Science 2022-11-30 Chunlin Yu , Ye Shi , Zimo Liu , Shenghua Gao , Jingya Wang

Federated Recommender Systems (FedRecs) leverage federated learning to protect user privacy by retaining data locally. However, user embeddings in FedRecs often encode sensitive attribute information, rendering them vulnerable to attribute…

Information Retrieval · Computer Science 2025-12-01 Yuyuan Li , Junjie Fang , Fengyuan Yu , Xichun Sheng , Tianyu Du , Xuyang Teng , Shaowei Jiang , Linbo Jiang , Jianan Lin , Chaochao Chen

With the growth of machine learning techniques, privacy of data of users has become a major concern. Most of the machine learning algorithms rely heavily on large amount of data which may be collected from various sources. Collecting these…

Machine Learning · Computer Science 2023-11-17 Mahfuzur Rahman Chowdhury , Muhammad Ibrahim

Unsupervised Person Re-identification (U-ReID) with pseudo labeling recently reaches a competitive performance compared to fully-supervised ReID methods based on modern clustering algorithms. However, such clustering-based scheme becomes…

Computer Vision and Pattern Recognition · Computer Science 2022-08-09 Xin Jin , Tianyu He , Xu Shen , Tongliang Liu , Xinchao Wang , Jianqiang Huang , Zhibo Chen , Xian-Sheng Hua

Recently unsupervised person re-identification (re-ID) has drawn much attention due to its open-world scenario settings where limited annotated data is available. Existing supervised methods often fail to generalize well on unseen domains,…

Computer Vision and Pattern Recognition · Computer Science 2024-06-18 Yuanpeng Tu

We present a class of methods for robust, personalized federated learning, called Fed+, that unifies many federated learning algorithms. The principal advantage of this class of methods is to better accommodate the real-world…

Machine Learning · Computer Science 2022-07-13 Achintya Kundu , Pengqian Yu , Laura Wynter , Shiau Hong Lim

Unsupervised domain adaptation has been widely adopted to generalize models for unlabeled data in a target domain, given labeled data in a source domain, whose data distributions differ from the target domain. However, existing works are…

Computer Vision and Pattern Recognition · Computer Science 2021-05-18 Weiming Zhuang , Xin Gan , Yonggang Wen , Xuesen Zhang , Shuai Zhang , Shuai Yi

Federated learning enables multiple parties to jointly train learning models without sharing their own underlying data, offering a practical pathway to privacy-preserving collaboration under data-governance constraints. Continued study of…

Machine Learning · Computer Science 2026-01-16 Chun Hei Michael Shiu , Chih Wei Ling

The robustness of federated learning (FL) is vital for the distributed training of an accurate global model that is shared among large number of clients. The collaborative learning framework by typically aggregating model updates is…

Federated Learning (FL) is developed to learn a single global model across the decentralized data, while is susceptible when realizing client-specific personalization in the presence of statistical heterogeneity. However, studies focus on…

Machine Learning · Computer Science 2022-04-27 Changxing Jing , Yan Huang , Yihong Zhuang , Liyan Sun , Yue Huang , Zhenlong Xiao , Xinghao Ding

Unsupervised person re-identification (ReID) aims at learning discriminative identity features for person retrieval without any annotations. Recent advances accomplish this task by leveraging clustering-based pseudo labels, but these pseudo…

Computer Vision and Pattern Recognition · Computer Science 2022-12-01 De Cheng , Haichun Tai , Nannan Wang , Zhen Wang , Xinbo Gao

Existing person re-identification (ReID) methods typically directly load the pre-trained ImageNet weights for initialization. However, as a fine-grained classification task, ReID is more challenging and exists a large domain gap between…

Computer Vision and Pattern Recognition · Computer Science 2021-12-02 Zizheng Yang , Xin Jin , Kecheng Zheng , Feng Zhao

Unsupervised cross-domain person re-identification (Re-ID) aims to adapt the information from the labelled source domain to an unlabelled target domain. Due to the lack of supervision in the target domain, it is crucial to identify the…

Computer Vision and Pattern Recognition · Computer Science 2020-01-14 Xinyu Zhang , Dong Gong , Jiewei Cao , Chunhua Shen

Person re-identification (re-id) aims to match the same person from images taken across multiple cameras. Most existing person re-id methods generally require a large amount of identity labeled data to act as discriminative guideline for…

Computer Vision and Pattern Recognition · Computer Science 2020-09-02 Usman Ali , Bayram Bayramli , Hongtao Lu