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While deep neural networks demonstrate state-of-the-art performance on a variety of learning tasks, their performance relies on the assumption that train and test distributions are the same, which may not hold in real-world applications.…

Machine Learning · Computer Science 2021-02-18 Wenyu Zhang , Mohamed Ragab , Ramon Sagarna

Unsupervised domain adaptation aims to learn a model of classifier for unlabeled samples on the target domain, given training data of labeled samples on the source domain. Impressive progress is made recently by learning invariant features…

Computer Vision and Pattern Recognition · Computer Science 2019-07-04 Yabin Zhang , Hui Tang , Kui Jia , Mingkui Tan

Machine learning systems generally assume that the training and testing distributions are the same. To this end, a key requirement is to develop models that can generalize to unseen distributions. Domain generalization (DG), i.e.,…

Machine Learning · Computer Science 2022-05-25 Jindong Wang , Cuiling Lan , Chang Liu , Yidong Ouyang , Tao Qin , Wang Lu , Yiqiang Chen , Wenjun Zeng , Philip S. Yu

In information retrieval (IR), domain adaptation is the process of adapting a retrieval model to a new domain whose data distribution is different from the source domain. Existing methods in this area focus on unsupervised domain adaptation…

Information Retrieval · Computer Science 2023-07-07 Helia Hashemi , Yong Zhuang , Sachith Sri Ram Kothur , Srivas Prasad , Edgar Meij , W. Bruce Croft

Existing unsupervised person re-identification (ReID) methods focus on adapting a model trained on a source domain to a fixed target domain. However, an adapted ReID model usually only works well on a certain target domain, but can hardly…

Computer Vision and Pattern Recognition · Computer Science 2022-03-15 Hao Chen , Benoit Lagadec , Francois Bremond

This work generalizes the problem of unsupervised domain generalization to the case in which no labeled samples are available (completely unsupervised). We are given unlabeled samples from multiple source domains, and we aim to learn a…

Machine Learning · Computer Science 2024-02-01 Amit Rozner , Barak Battash , Lior Wolf , Ofir Lindenbaum

Domain adaptation (DA) is the task of classifying an unlabeled dataset (target) using a labeled dataset (source) from a related domain. The majority of successful DA methods try to directly match the distributions of the source and target…

Machine Learning · Statistics 2018-03-22 Twan van Laarhoven , Elena Marchiori

Training models dedicated to semantic segmentation requires a large amount of pixel-wise annotated data. Due to their costly nature, these annotations might not be available for the task at hand. To alleviate this problem, unsupervised…

Computer Vision and Pattern Recognition · Computer Science 2022-06-07 Fei Pan , Francois Rameau , Junsik Kim , In So Kweon

Image retrieval under generalized test scenarios has gained significant momentum in literature, and the recently proposed protocol of Universal Cross-domain Retrieval is a pioneer in this direction. A common practice in any such generalized…

Computer Vision and Pattern Recognition · Computer Science 2023-04-12 Soumava Paul , Titir Dutta , Aheli Saha , Abhishek Samanta , Soma Biswas

The domain adaptation (DA) approaches available to date are usually not well suited for practical DA scenarios of remote sensing image classification, since these methods (such as unsupervised DA) rely on rich prior knowledge about the…

Computer Vision and Pattern Recognition · Computer Science 2023-01-30 Qingsong Xu , Yilei Shi , Xin Yuan , Xiao Xiang Zhu

Recently, anatomical landmark detection has achieved great progresses on single-domain data, which usually assumes training and test sets are from the same domain. However, such an assumption is not always true in practice, which can cause…

Computer Vision and Pattern Recognition · Computer Science 2023-08-28 Haibo Jin , Haoxuan Che , Hao Chen

Unsupervised domain adaptation enables intelligent models to transfer knowledge from a labeled source domain to a similar but unlabeled target domain. Recent study reveals that knowledge can be transferred from one source domain to another…

Computer Vision and Pattern Recognition · Computer Science 2020-11-06 Yueming Yin , Zhen Yang , Haifeng Hu , Xiaofu Wu

Domain adaptation (DA) aims to transfer knowledge learned from a labeled source domain to an unlabeled or a less labeled but related target domain. Ideally, the source and target distributions should be aligned to each other equally to…

Computer Vision and Pattern Recognition · Computer Science 2022-08-15 Jian Hu , Haowen Zhong , Junchi Yan , Shaogang Gong , Guile Wu , Fei Yang

A practical face recognition system demands not only high recognition performance, but also the capability of detecting spoofing attacks. While emerging approaches of face anti-spoofing have been proposed in recent years, most of them do…

Computer Vision and Pattern Recognition · Computer Science 2019-12-30 Xiaoguang Tu , Hengsheng Zhang , Mei Xie , Yao Luo , Yuefei Zhang , Zheng Ma

Unsupervised domain adaptation methods seek to generalize effectively on unlabeled test data, especially when encountering the common challenge in time series data that distribution shifts occur between training and testing datasets. In…

Machine Learning · Computer Science 2025-08-27 Weide Liu , Xiaoyang Zhong , Lu Wang , Jingwen Hou , Yuemei Luo , Jiebin Yan , Yuming Fang

In recent years, supervised person re-identification (re-ID) models have received increasing studies. However, these models trained on the source domain always suffer dramatic performance drop when tested on an unseen domain. Existing…

Computer Vision and Pattern Recognition · Computer Science 2021-02-24 Hao Feng , Minghao Chen , Jinming Hu , Dong Shen , Haifeng Liu , Deng Cai

Person re-identification (Re-ID) has achieved great success in the supervised scenario. However, it is difficult to directly transfer the supervised model to arbitrary unseen domains due to the model overfitting to the seen source domains.…

Computer Vision and Pattern Recognition · Computer Science 2022-06-14 Lei Qi , Lei Wang , Yinghuan Shi , Xin Geng

In real applications, object detectors based on deep networks still face challenges of the large domain gap between the labeled training data and unlabeled testing data. To reduce the gap, recent techniques are proposed by aligning the…

Computer Vision and Pattern Recognition · Computer Science 2020-07-07 Sanli Tang , Zhanzhan Cheng , Shiliang Pu , Dashan Guo , Yi Niu , Fei Wu

Image alignment across domains has recently become one of the realistic and popular topics in the research community. In this problem, a deep learning-based image alignment method is usually trained on an available largescale database.…

Computer Vision and Pattern Recognition · Computer Science 2019-06-03 Thanh-Dat Truong , Khoa Luu , Chi Nhan Duong , Ngan Le , Minh-Triet Tran

It is a strong prerequisite to access source data freely in many existing unsupervised domain adaptation approaches. However, source data is agnostic in many practical scenarios due to the constraints of expensive data transmission and data…

Computer Vision and Pattern Recognition · Computer Science 2021-02-24 Weijie Chen , Luojun Lin , Shicai Yang , Di Xie , Shiliang Pu , Yueting Zhuang , Wenqi Ren