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In person re-identification (ReID), very recent researches have validated pre-training the models on unlabelled person images is much better than on ImageNet. However, these researches directly apply the existing self-supervised learning…

Computer Vision and Pattern Recognition · Computer Science 2022-07-21 Kuan Zhu , Haiyun Guo , Tianyi Yan , Yousong Zhu , Jinqiao Wang , Ming Tang

Domain generalizable (DG) person re-identification (ReID) aims to test across unseen domains without access to the target domain data at training time, which is a realistic but challenging problem. In contrast to methods assuming an…

Computer Vision and Pattern Recognition · Computer Science 2022-07-22 Boqiang Xu , Jian Liang , Lingxiao He , Zhenan Sun

Domain generalization (DG) for person re-identification (ReID) is a challenging problem, as access to target domain data is not permitted during the training process. Most existing DG ReID methods update the feature extractor and classifier…

Computer Vision and Pattern Recognition · Computer Science 2023-06-09 Wentao Tan , Changxing Ding , Pengfei Wang , Mingming Gong , Kui Jia

Pretraining large language models (LLMs) on vast and heterogeneous datasets is crucial for achieving state-of-the-art performance across diverse downstream tasks. However, current training paradigms treat all samples equally, overlooking…

Machine Learning · Computer Science 2025-02-11 Daouda Sow , Herbert Woisetschläger , Saikiran Bulusu , Shiqiang Wang , Hans-Arno Jacobsen , Yingbin Liang

Unsupervised domain adaptive person Re-IDentification (ReID) is challenging because of the large domain gap between source and target domains, as well as the lackage of labeled data on the target domain. This paper tackles this challenge…

Computer Vision and Pattern Recognition · Computer Science 2020-07-22 Jianing Li , Shiliang Zhang

The training loss function that enforces certain training sample distribution patterns plays a critical role in building a re-identification (ReID) system. Besides the basic requirement of discrimination, i.e., the features corresponding to…

Computer Vision and Pattern Recognition · Computer Science 2021-05-03 Lu Yang , Yunlong Wang , Lingqiao Liu , Peng Wang , Lu Chi , Zehuan Yuan , Changhu Wang , Yanning Zhang

Person Re-Identification (ReID) remains a challenging problem in computer vision. This work reviews various training paradigm and evaluates the robustness of state-of-the-art ReID models in cross-domain applications and examines the role of…

Computer Vision and Pattern Recognition · Computer Science 2026-01-29 Lakshman Balasubramanian

Human intelligence can retrieve any person according to both visual and language descriptions. However, the current computer vision community studies specific person re-identification (ReID) tasks in different scenarios separately, which…

Computer Vision and Pattern Recognition · Computer Science 2025-04-30 Weizhen He , Yiheng Deng , Yunfeng Yan , Feng Zhu , Yizhou Wang , Lei Bai , Qingsong Xie , Donglian Qi , Wanli Ouyang , Shixiang Tang

Most state-of-the-art person re-identification (re-id) methods depend on supervised model learning with a large set of cross-view identity labelled training data. Even worse, such trained models are limited to only the same-domain…

Computer Vision and Pattern Recognition · Computer Science 2019-07-24 Xu Lan , Xiatian Zhu , Shaogang Gong

One possible approach to tackle the class imbalance in classification tasks is to resample a training dataset, i.e., to drop some of its elements or to synthesize new ones. There exist several widely-used resampling methods. Recent research…

Machine Learning · Computer Science 2018-09-18 Smolyakov Dmitry , Alexander Korotin , Pavel Erofeev , Artem Papanov , Evgeny Burnaev

Hyperparameter optimization is crucial for obtaining peak performance of machine learning models. The standard protocol evaluates various hyperparameter configurations using a resampling estimate of the generalization error to guide…

Machine Learning · Statistics 2024-11-11 Thomas Nagler , Lennart Schneider , Bernd Bischl , Matthias Feurer

The infrequent occurrence of overfit in deep neural networks is perplexing. On the one hand, theory predicts that as models get larger they should eventually become too specialized for a specific training set, with ensuing decrease in…

Machine Learning · Computer Science 2023-12-29 Uri Stern , Daphna Weinshall

Person re-identification (Re-ID) aims to match images of the same individual across non-overlapping camera views and remains challenging due to domain shifts caused by variations in illumination, background, camera characteristics, and…

Computer Vision and Pattern Recognition · Computer Science 2026-05-04 Sundas Iqbal , Qing Tian , Danish Ali , Jianping Gou , Weihua Oue

In this paper, we aim to tackle the one-shot person re-identification problem where only one image is labelled for each person, while other images are unlabelled. This task is challenging due to the lack of sufficient labelled training…

Computer Vision and Pattern Recognition · Computer Science 2022-01-21 Hui Li , Jimin Xiao , Mingjie Sun , Eng Gee Lim , Yao Zhao

Many modern high-performing machine learning models such as GPT-3 primarily rely on scaling up models, e.g., transformer networks. Simultaneously, a parallel line of work aims to improve the model performance by augmenting an input instance…

Machine Learning · Computer Science 2022-10-07 Soumya Basu , Ankit Singh Rawat , Manzil Zaheer

When data is generated by multiple sources, conventional training methods update models assuming equal reliability for each source and do not consider their individual data quality. However, in many applications, sources have varied levels…

Machine Learning · Computer Science 2025-02-17 Alexander Capstick , Francesca Palermo , Tianyu Cui , Payam Barnaghi

Existing fully-supervised person re-identification (ReID) methods usually suffer from poor generalization capability caused by domain gaps. The key to solving this problem lies in filtering out identity-irrelevant interference and learning…

Computer Vision and Pattern Recognition · Computer Science 2020-05-25 Xin Jin , Cuiling Lan , Wenjun Zeng , Zhibo Chen , Li Zhang

In computer vision, it is standard practice to draw a single sample from the data augmentation procedure for each unique image in the mini-batch. However recent work has suggested drawing multiple samples can achieve higher test accuracies.…

Machine Learning · Computer Science 2022-02-25 Stanislav Fort , Andrew Brock , Razvan Pascanu , Soham De , Samuel L. Smith

Long-tail learning has received significant attention in recent years due to the challenge it poses with extremely imbalanced datasets. In these datasets, only a few classes (known as the head classes) have an adequate number of training…

Computer Vision and Pattern Recognition · Computer Science 2023-10-30 Jiang-Xin Shi , Tong Wei , Yuke Xiang , Yu-Feng Li

A common problem in health research is that we have a large database with many variables measured on a large number of individuals. We are interested in measuring additional variables on a subsample; these measurements may be newly…

Methodology · Statistics 2022-03-22 Thomas Lumley , Tong Chen