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Person re-identification (re-ID) aims at matching images of the same identity across camera views. Due to varying distances between cameras and persons of interest, resolution mismatch can be expected, which would degrade person re-ID…

Computer Vision and Pattern Recognition · Computer Science 2019-08-19 Yu-Jhe Li , Yun-Chun Chen , Yen-Yu Lin , Xiaofei Du , Yu-Chiang Frank Wang

Remote Sensing Change Detection (RS-CD) aims to detect relevant changes from Multi-Temporal Remote Sensing Images (MT-RSIs), which aids in various RS applications such as land cover, land use, human development analysis, and disaster…

Computer Vision and Pattern Recognition · Computer Science 2023-03-17 Wele Gedara Chaminda Bandara , Vishal M. Patel

Unsupervised person re-ID is the task of identifying people on a target data set for which the ID labels are unavailable during training. In this paper, we propose to unify two trends in unsupervised person re-ID: clustering & fine-tuning…

Computer Vision and Pattern Recognition · Computer Science 2020-04-29 Guillaume Delorme , Yihong Xu , Stephane Lathuilière , Radu Horaud , Xavier Alameda-Pineda

Unsupervised learning aims to capture the underlying structure of potentially large and high-dimensional datasets. Traditionally, this involves using dimensionality reduction (DR) methods to project data onto lower-dimensional spaces or…

Machine Learning · Computer Science 2025-06-30 Hugues Van Assel , Cédric Vincent-Cuaz , Nicolas Courty , Rémi Flamary , Pascal Frossard , Titouan Vayer

Clustering-based approach has proved effective in dealing with unsupervised domain adaptive person re-identification (ReID) tasks. However, existing works along this approach still suffer from noisy pseudo labels and the unreliable…

Computer Vision and Pattern Recognition · Computer Science 2022-01-26 Chunren Tang , Dingyu Xue , Dongyue Chen

Real-life data are often non-IID due to complex distributions and interactions, and the sensitivity to the distribution of samples can differ among learning models. Accordingly, a key question for any supervised or unsupervised model is…

Machine Learning · Computer Science 2023-10-03 Zhilin Zhao , Longbing Cao

Due to domain bias, directly deploying a deep person re-identification (re-ID) model trained on one dataset often achieves considerably poor accuracy on another dataset. In this paper, we propose an Adaptive Exploration (AE) method to…

Computer Vision and Pattern Recognition · Computer Science 2020-04-13 Yuhang Ding , Hehe Fan , Mingliang Xu , Yi Yang

Medical anomaly detection is a crucial yet challenging task aimed at recognizing abnormal images to assist in diagnosis. Due to the high-cost annotations of abnormal images, most methods utilize only known normal images during training and…

Computer Vision and Pattern Recognition · Computer Science 2023-03-21 Yu Cai , Hao Chen , Xin Yang , Yu Zhou , Kwang-Ting Cheng

Out-of-distribution (OOD) detection methods assume that they have test ground truths, i.e., whether individual test samples are in-distribution (IND) or OOD. However, in the real world, we do not always have such ground truths, and thus do…

Computer Vision and Pattern Recognition · Computer Science 2023-03-17 Yuhang Zhang , Weihong Deng , Liang Zheng

Training robust deep learning models is crucial in Earth Observation, where globally deployed models often face distribution shifts that degrade performance, especially in low-data regions. Out-of-distribution (OOD) detection addresses this…

Computer Vision and Pattern Recognition · Computer Science 2025-04-10 Burak Ekim , Girmaw Abebe Tadesse , Caleb Robinson , Gilles Hacheme , Michael Schmitt , Rahul Dodhia , Juan M. Lavista Ferres

Unsupervised person re-identification (Re-ID) is a promising and very challenging research problem in computer vision. Learning robust and discriminative features with unlabeled data is of central importance to Re-ID. Recently, more…

Computer Vision and Pattern Recognition · Computer Science 2022-05-12 Zheng Hu , Chuang Zhu , Gang He

Unsupervised person re-identification (Re-ID) aims to retrieve person images across cameras without any identity labels. Most clustering-based methods roughly divide image features into clusters and neglect the feature distribution noise…

Computer Vision and Pattern Recognition · Computer Science 2023-04-26 Pengna Li , Kangyi Wu , Sanping Zhou. Qianxin Huang , Jinjun Wang

Spurious correlations in training data significantly hinder the generalization capability of machine learning models when faced with distribution shifts, leading to the proposition of numberous debiasing methods. However, it remains to be…

Machine Learning · Computer Science 2025-05-22 Peng Kuang , Zhibo Wang , Zhixuan Chu , Jingyi Wang , Kui Ren

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

The Sliced Gromov-Wasserstein (SGW) distance, aiming to relieve the computational cost of solving a non-convex quadratic program that is the Gromov-Wasserstein distance, utilizes projecting directions sampled uniformly from unit…

Machine Learning · Statistics 2025-07-18 Dhruv Sarkar , Aprameyo Chakrabartty , Anish Chakrabarty , Swagatam Das

Recent advancements in 3D Gaussian Splatting (3DGS) and Neural Radiance Fields (NeRF) have achieved impressive results in real-time 3D reconstruction and novel view synthesis. However, these methods struggle in large-scale, unconstrained…

Computer Vision and Pattern Recognition · Computer Science 2025-04-03 Niluthpol Chowdhury Mithun , Tuan Pham , Qiao Wang , Ben Southall , Kshitij Minhas , Bogdan Matei , Stephan Mandt , Supun Samarasekera , Rakesh Kumar

Recent self-supervised contrastive learning provides an effective approach for unsupervised person re-identification (ReID) by learning invariance from different views (transformed versions) of an input. In this paper, we incorporate a…

Computer Vision and Pattern Recognition · Computer Science 2021-03-31 Hao Chen , Yaohui Wang , Benoit Lagadec , Antitza Dantcheva , Francois Bremond

Despite the promising progress made in recent years, person re-identification (re-ID) remains a challenging task due to the complex variations in human appearances from different camera views. For this challenging problem, a large variety…

Computer Vision and Pattern Recognition · Computer Science 2017-05-02 Xun Yang , Meng Wang , Richang Hong , Qi Tian , Yong Rui

Mode collapse is a significant unsolved issue of generative adversarial networks. In this work, we examine the causes of mode collapse from a novel perspective. Due to the nonuniform sampling in the training process, some sub-distributions…

Machine Learning · Computer Science 2024-01-22 Yanxiang Gong , Zhiwei Xie , Guozhen Duan , Zheng Ma , Mei Xie

Unsupervised visible-infrared person re-identification (USVI-ReID) aims to match specified people in infrared images to visible images without annotations, and vice versa. USVI-ReID is a challenging yet under-explored task. Most existing…

Computer Vision and Pattern Recognition · Computer Science 2024-10-25 Jiangming Shi , Xiangbo Yin , Yachao Zhang , Zhizhong Zhang , Yuan Xie , Yanyun Qu