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Recently, unsupervised person re-identification (Re-ID) has received increasing research attention due to its potential for label-free applications. A promising way to address unsupervised Re-ID is clustering-based, which generates pseudo…

Computer Vision and Pattern Recognition · Computer Science 2022-11-23 Menglin Wang , Jiachen Li , Baisheng Lai , Xiaojin Gong , Xian-Sheng Hua

While deep face recognition has benefited significantly from large-scale labeled data, current research is focused on leveraging unlabeled data to further boost performance, reducing the cost of human annotation. Prior work has mostly been…

Computer Vision and Pattern Recognition · Computer Science 2020-07-16 Aruni RoyChowdhury , Xiang Yu , Kihyuk Sohn , Erik Learned-Miller , Manmohan Chandraker

Few-shot classification (FSC) is challenging due to the scarcity of labeled training data (e.g. only one labeled data point per class). Meta-learning has shown to achieve promising results by learning to initialize a classification model…

Computer Vision and Pattern Recognition · Computer Science 2019-10-01 Xinzhe Li , Qianru Sun , Yaoyao Liu , Shibao Zheng , Qin Zhou , Tat-Seng Chua , Bernt Schiele

Semi-supervised learning (SSL) can reduce the need for large labelled datasets by incorporating unlabelled data into the training. This is particularly interesting for semantic segmentation, where labelling data is very costly and…

Computer Vision and Pattern Recognition · Computer Science 2022-10-20 Sebastian Scherer , Robin Schön , Rainer Lienhart

In the conventional person re-id setting, it is assumed that the labeled images are the person images within the bounding box for each individual; this labeling across multiple nonoverlapping camera views from raw video surveillance is…

Computer Vision and Pattern Recognition · Computer Science 2019-05-29 Jingke Meng , Sheng Wu , Wei-Shi Zheng

Person re-identification (re-ID) requires one to match images of the same person across camera views. As a more challenging task, semi-supervised re-ID tackles the problem that only a number of identities in training data are fully labeled,…

Computer Vision and Pattern Recognition · Computer Science 2020-10-06 Chih-Ting Liu , Yu-Jhe Li , Shao-Yi Chien , Yu-Chiang Frank Wang

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

Due to some complex factors (e.g., occlusion, pose variation and diverse camera perspectives), extracting stronger feature representation in person re-identification remains a challenging task. In this paper, we proposed a novel…

Computer Vision and Pattern Recognition · Computer Science 2024-10-24 Zhangjian Ji , Donglin Cheng , Kai Feng

Unsupervised Re-ID methods aim at learning robust and discriminative features from unlabeled data. However, existing methods often ignore the relationship between module parameters of Re-ID framework and feature distributions, which may…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 Ziqi He , Mengjia Xue , Yunhao Du , Zhicheng Zhao , Fei Su

Video-based person re-identification (Re-ID) aims at matching the video tracklets with cropped video frames for identifying the pedestrians under different cameras. However, there exists severe spatial and temporal misalignment for those…

Computer Vision and Pattern Recognition · Computer Science 2021-09-23 Chih-Ting Liu , Jun-Cheng Chen , Chu-Song Chen , Shao-Yi Chien

Open-set semi-supervised learning (OSSL) leverages unlabeled data containing both in-distribution (ID) and unknown out-of-distribution (OOD) samples, aiming simultaneously to improve closed-set accuracy and detect novel OOD instances.…

Machine Learning · Computer Science 2026-01-19 You Rim Choi , Subeom Park , Seojun Heo , Eunchung Noh , Hyung-Sin Kim

We present streaming self-training (SST) that aims to democratize the process of learning visual recognition models such that a non-expert user can define a new task depending on their needs via a few labeled examples and minimal domain…

Computer Vision and Pattern Recognition · Computer Science 2021-04-08 Zhiqiu Lin , Deva Ramanan , Aayush Bansal

Most existing unsupervised person re-identification (Re-ID) methods use clustering to generate pseudo labels for model training. Unfortunately, clustering sometimes mixes different true identities together or splits the same identity into…

Computer Vision and Pattern Recognition · Computer Science 2022-04-15 Xinyu Zhang , Dongdong Li , Zhigang Wang , Jian Wang , Errui Ding , Javen Qinfeng Shi , Zhaoxiang Zhang , Jingdong Wang

Person re-identification (Re-ID) aims to match pedestrians under dis-joint cameras. Most Re-ID methods formulate it as visual representation learning and image search, and its accuracy is consequently affected greatly by the search space.…

Computer Vision and Pattern Recognition · Computer Science 2021-08-03 Min Ren , Lingxiao He , Xingyu Liao , Wu Liu , Yunlong Wang , Tieniu Tan

Unsupervised representation learning has significantly advanced various machine learning tasks. In the computer vision domain, state-of-the-art approaches utilize transformations like random crop and color jitter to achieve invariant…

Computer Vision and Pattern Recognition · Computer Science 2025-01-16 Jaemyung Yu , Jaehyun Choi , Dong-Jae Lee , HyeongGwon Hong , Junmo Kim

Existing person re-identification (re-ID) research mainly focuses on pedestrian identity matching across cameras in adjacent areas. However, in reality, it is inevitable to face the problem of pedestrian identity matching across…

Computer Vision and Pattern Recognition · Computer Science 2023-07-18 Huafeng Li , Yanmei Mao , Yafei Zhang , Guanqiu Qi , Zhengtao Yu

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

3D object detection is essential for autonomous driving and robotic perception, yet its reliance on large-scale manually annotated data limits scalability and adaptability. To reduce annotation dependency, unsupervised and…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Yushen He , Lei Zhao , Weidong Chen

Self-training via pseudo labeling is a conventional, simple, and popular pipeline to leverage unlabeled data. In this work, we first construct a strong baseline of self-training (namely ST) for semi-supervised semantic segmentation via…

Computer Vision and Pattern Recognition · Computer Science 2022-03-04 Lihe Yang , Wei Zhuo , Lei Qi , Yinghuan Shi , Yang Gao

Existing person re-identification (re-id) methods are stuck when deployed to a new unseen scenario despite the success in cross-camera person matching. Recent efforts have been substantially devoted to domain adaptive person re-id where…

Computer Vision and Pattern Recognition · Computer Science 2021-09-10 Lingxiao He , Wu Liu , Jian Liang , Kecheng Zheng , Xingyu Liao , Peng Cheng , Tao Mei