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This paper aims at a newly raising task in visual surveillance: re-identifying people at a distance by matching body information, given several reference examples. Most of existing works solve this task by matching a reference template with…

Computer Vision and Pattern Recognition · Computer Science 2015-02-03 Yuanlu Xu , Liang Lin , Wei-Shi Zheng , Xiaobai Liu

Unsupervised visible-infrared person re-identification (USL-VI-ReID) endeavors to retrieve pedestrian images of the same identity from different modalities without annotations. While prior work focuses on establishing cross-modality…

Computer Vision and Pattern Recognition · Computer Science 2024-12-09 Lingfeng He , De Cheng , Nannan Wang , Xinbo Gao

Unsupervised learning has gained prominence in the big data era, offering a means to extract valuable insights from unlabeled datasets. Deep clustering has emerged as an important unsupervised category, aiming to exploit the non-linear…

Machine Learning · Computer Science 2024-02-02 Georgios Vardakas , Ioannis Papakostas , Aristidis Likas

Person re-identification (Re-ID) aims to match person images across different camera views, with occluded Re-ID addressing scenarios where pedestrians are partially visible. While pre-trained vision-language models have shown effectiveness…

Computer Vision and Pattern Recognition · Computer Science 2025-08-08 Rui Zhi , Zhen Yang , Haiyang Zhang

This paper addresses unsupervised person re-identification (Re-ID) using multi-label prediction and classification based on graph-structural insight. Our method extracts features from person images and produces a graph that consists of the…

Computer Vision and Pattern Recognition · Computer Science 2021-06-17 Jongmin Yu , Hyeontaek Oh

Unsupervised visible-infrared person re-identification (USL-VI-ReID) is a promising yet challenging retrieval task. The key challenges in USL-VI-ReID are to effectively generate pseudo-labels and establish pseudo-label correspondences…

Computer Vision and Pattern Recognition · Computer Science 2024-07-30 Jiangming Shi , Xiangbo Yin , Yeyun Chen , Yachao Zhang , Zhizhong Zhang , Yuan Xie , Yanyun Qu

We present ImplicitSLIM, a novel unsupervised learning approach for sparse high-dimensional data, with applications to collaborative filtering. Sparse linear methods (SLIM) and their variations show outstanding performance, but they are…

Information Retrieval · Computer Science 2024-06-04 Ilya Shenbin , Sergey Nikolenko

Person re-identification (re-id) is a pivotal task within an intelligent surveillance pipeline and there exist numerous re-id frameworks that achieve satisfactory performance in challenging benchmarks. However, these systems struggle to…

Computer Vision and Pattern Recognition · Computer Science 2022-11-17 Tharindu Fernando , Clinton Fookes , Sridha Sridharan , Dana Michalski

Semi-Supervised Learning (SSL) has shown its strong ability in utilizing unlabeled data when labeled data is scarce. However, most SSL algorithms work under the assumption that the class distributions are balanced in both training and test…

Computer Vision and Pattern Recognition · Computer Science 2021-12-14 Ju He , Adam Kortylewski , Shaokang Yang , Shuai Liu , Cheng Yang , Changhu Wang , Alan Yuille

Existing person re-identification (re-id) methods assume the provision of accurately cropped person bounding boxes with minimum background noise, mostly by manually cropping. This is significantly breached in practice when person bounding…

Computer Vision and Pattern Recognition · Computer Science 2018-07-10 Xu Lan , Hanxiao Wang , Shaogang Gong , Xiatian Zhu

Semi-supervised learning by self-training heavily relies on pseudo-label selection (PLS). The selection often depends on the initial model fit on labeled data. Early overfitting might thus be propagated to the final model by selecting…

Machine Learning · Statistics 2023-06-27 Julian Rodemann , Jann Goschenhofer , Emilio Dorigatti , Thomas Nagler , Thomas Augustin

Person Re-identification (Re-ID) has attracted great attention due to its promising real-world applications. However, in practice, it is always costly to annotate the training data to train a Re-ID model, and it still remains challenging to…

Computer Vision and Pattern Recognition · Computer Science 2022-06-03 Lantian Xue , Yixiong Zou , Peixi Peng , Yonghong Tian , Tiejun Huang

Cloth-changing person reidentification (ReID) is a newly emerging research topic that is aimed at addressing the issues of large feature variations due to cloth-changing and pedestrian view/pose changes. Although significant progress has…

Computer Vision and Pattern Recognition · Computer Science 2023-11-20 Zan Gao , Shenxun Wei , Weili Guan , Lei Zhu , Meng Wang , Shenyong Chen

Semi-supervised clustering seeks to augment traditional clustering methods by incorporating side information provided via human expertise in order to increase the semantic meaningfulness of the resulting clusters. However, most current…

Machine Learning · Computer Science 2014-02-17 Caiming Xiong , David Johnson , Jason J. Corso

Lifelong person re-identification (LReID) aims to continuously adapt to new domains while mitigating catastrophic forgetting. While replay-based methods effectively alleviate forgetting, they are constrained by strict memory budgets,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-16 Mingyu Wang , Wei Jiang , Haojie Liu , Zhiyong Li , Q. M. Jonathan Wu

Self-training is a simple yet effective method within semi-supervised learning. The idea is to iteratively enhance training data by adding pseudo-labeled data. Its generalization performance heavily depends on the selection of these…

Machine Learning · Statistics 2023-03-03 Julian Rodemann , Christoph Jansen , Georg Schollmeyer , Thomas Augustin

Unsupervised cross-domain person re-identification (Re-ID) faces two key issues. One is the data distribution discrepancy between source and target domains, and the other is the lack of labelling information in target domain. They are…

Computer Vision and Pattern Recognition · Computer Science 2019-08-13 Lei Qi , Lei Wang , Jing Huo , Luping Zhou , Yinghuan Shi , Yang Gao

Vehicle re-identification (Re-ID) is an active task due to its importance in large-scale intelligent monitoring in smart cities. Despite the rapid progress in recent years, most existing methods handle vehicle Re-ID task in a supervised…

Computer Vision and Pattern Recognition · Computer Science 2020-11-19 Aihua Zheng , Xia Sun , Chenglong Li , Jin Tang

Deep learning models have achieved state-of-the-art performance in many computer vision tasks. However, in real-world scenarios, novel classes that were unseen during training often emerge, requiring models to acquire new knowledge…

Computer Vision and Pattern Recognition · Computer Science 2025-09-01 Lucas Rakotoarivony

Most existing person re-identification (re-id) methods require supervised model learning from a separate large set of pairwise labelled training data for every single camera pair. This significantly limits their scalability and usability in…

Computer Vision and Pattern Recognition · Computer Science 2018-03-28 Jingya Wang , Xiatian Zhu , Shaogang Gong , Wei Li