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We revisit two popular convolutional neural networks (CNN) in person re-identification (re-ID), i.e, verification and classification models. The two models have their respective advantages and limitations due to different loss functions. In…

Computer Vision and Pattern Recognition · Computer Science 2018-04-04 Zhedong Zheng , Liang Zheng , Yi Yang

Person re-identification (ReID) is to identify pedestrians observed from different camera views based on visual appearance. It is a challenging task due to large pose variations, complex background clutters and severe occlusions. Recently,…

Computer Vision and Pattern Recognition · Computer Science 2018-05-17 Jing Xu , Rui Zhao , Feng Zhu , Huaming Wang , Wanli Ouyang

Instance-level alignment is widely exploited for person re-identification, e.g. spatial alignment, latent semantic alignment and triplet alignment. This paper probes another feature alignment modality, namely cluster-level feature alignment…

Computer Vision and Pattern Recognition · Computer Science 2020-08-18 Qiuyu Chen , Wei Zhang , Jianping Fan

Person reidentification (ReID) is a very hot research topic in machine learning and computer vision, and many person ReID approaches have been proposed; however, most of these methods assume that the same person has the same clothes within…

Computer Vision and Pattern Recognition · Computer Science 2021-08-11 Zan Gao , Hongwei Wei , Weili Guan , Weizhi Nie , Meng Liu , Meng Wang

Person re-identification (re-ID) is a task of matching pedestrians under disjoint camera views. To recognise paired snapshots, it has to cope with large cross-view variations caused by the camera view shift. Supervised deep neural networks…

Computer Vision and Pattern Recognition · Computer Science 2019-07-24 Lin Wu , Richang Hong , Yang Wang , Meng Wang

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

Cloth-Changing Person Re-Identification (CC-ReID) is a common and realistic problem since fashion constantly changes over time and people's aesthetic preferences are not set in stone. While most existing cloth-changing ReID methods focus on…

Computer Vision and Pattern Recognition · Computer Science 2023-10-31 Yubin Wang , Huimin Yu , Yuming Yan , Shuyi Song , Biyang Liu , Yichong Lu

Occluded person re-identification focuses on matching partially visible pedestrians across multiple camera views. However, occlusions disrupt body-region cues, thereby complicating cross-view matching. Most person ReID methods built on…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Zhangjian Ji , Shaotong Qiao , Kai Feng , Wei Wei

Person re-identification aims to identify the same pedestrian across non-overlapping camera views. Deep learning techniques have been applied for person re-identification recently, towards learning representation of pedestrian appearance.…

Computer Vision and Pattern Recognition · Computer Science 2018-11-20 Jiawei Liu , Zheng-Jun Zha , Hongtao Xie , Zhiwei Xiong , Yongdong Zhang

Existing methods for video-based person re-identification (ReID) mainly learn the appearance feature of a given pedestrian via a feature extractor and a feature aggregator. However, the appearance models would fail when different…

Computer Vision and Pattern Recognition · Computer Science 2022-09-26 Honghu Pan , Qiao Liu , Yongyong Chen , Yunqi He , Yuan Zheng , Feng Zheng , Zhenyu He

In real-world video surveillance applications, person re-identification (ReID) suffers from the effects of occlusions and detection errors. Despite recent advances, occlusions continue to corrupt the features extracted by state-of-art CNN…

Computer Vision and Pattern Recognition · Computer Science 2023-07-25 Madhu Kiran , R Gnana Praveen , Le Thanh Nguyen-Meidine , Soufiane Belharbi , Louis-Antoine Blais-Morin , Eric Granger

Person Re-identification (re-id) aims to match people across non-overlapping camera views in a public space. It is a challenging problem because many people captured in surveillance videos wear similar clothes. Consequently, the differences…

Computer Vision and Pattern Recognition · Computer Science 2017-09-18 Xuelin Qian , Yanwei Fu , Yu-Gang Jiang , Tao Xiang , Xiangyang Xue

Visible-Infrared Person Re-identification (VI-ReID) is a challenging cross-modal pedestrian retrieval task, due to significant intra-class variations and cross-modal discrepancies among different cameras. Existing works mainly focus on…

Computer Vision and Pattern Recognition · Computer Science 2024-03-27 Kaijie Ren , Lei Zhang

Matching individuals across non-overlapping camera networks, known as person re-identification, is a fundamentally challenging problem due to the large visual appearance changes caused by variations of viewpoints, lighting, and occlusion.…

Computer Vision and Pattern Recognition · Computer Science 2016-05-25 Sakrapee Paisitkriangkrai , Lin Wu , Chunhua Shen , Anton van den Hengel

Classical person re-identification approaches assume that a person of interest has appeared across different cameras and can be queried by one of the existing images. However, in real-world surveillance scenarios, frequently no visual…

Computer Vision and Pattern Recognition · Computer Science 2020-03-03 Ammarah Farooq , Muhammad Awais , Fei Yan , Josef Kittler , Ali Akbari , Syed Safwan Khalid

Clothes-Changing Person Re-Identification (ReID) aims to recognize the same individual across different videos captured at various times and locations. This task is particularly challenging due to changes in appearance, such as clothing,…

Computer Vision and Pattern Recognition · Computer Science 2025-03-17 Asaf Joseph , Shmuel Peleg

Despite the great success of face recognition techniques, recognizing persons under unconstrained settings remains challenging. Issues like profile views, unfavorable lighting, and occlusions can cause substantial difficulties. Previous…

Computer Vision and Pattern Recognition · Computer Science 2018-06-11 Qingqiu Huang , Yu Xiong , Dahua Lin

Person re-identification (Re-ID) is the task of matching humans across cameras with non-overlapping views that has important applications in visual surveillance. Like other computer vision tasks, this task has gained much with the…

Computer Vision and Pattern Recognition · Computer Science 2018-07-24 Sergey Rodionov , Alexey Potapov , Hugo Latapie , Enzo Fenoglio , Maxim Peterson

Contrastive Language-Image Pre-Training (CLIP) model excels in traditional person re-identification (ReID) tasks due to its inherent advantage in generating textual descriptions for pedestrian images. However, applying CLIP directly to…

Computer Vision and Pattern Recognition · Computer Science 2024-10-01 Xuan Tan , Xun Gong , Yang Xiang

Cloth-changing person re-identification (CC-ReID) aims to match persons who change clothes over long periods. The key challenge in CC-ReID is to extract clothing-independent features, such as face, hairstyle, body shape, and gait. Current…

Computer Vision and Pattern Recognition · Computer Science 2024-07-03 Chunlei Peng , Boyu Wang , Decheng Liu , Nannan Wang , Ruimin Hu , Xinbo Gao