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The task of unsupervised domain adaptation is proposed to transfer the knowledge of a label-rich domain (source domain) to a label-scarce domain (target domain). Matching feature distributions between different domains is a widely applied…

Machine Learning · Computer Science 2018-12-19 Toshihiko Matsuura , Kuniaki Saito , Tatsuya Harada

Deep topological data analysis (TDA) offers a principled framework for capturing structural invariants such as connectivity and cycles that persist across scales, making it a natural fit for anomaly segmentation (AS). Unlike thresholdbased…

Computer Vision and Pattern Recognition · Computer Science 2026-01-29 Ali Zia , Usman Ali , Umer Ramzan , Abdul Rehman , Abdelwahed Khamis , Wei Xiang

Semi-Supervised Domain Adaptation (SSDA) involves learning to classify unseen target data with a few labeled and lots of unlabeled target data, along with many labeled source data from a related domain. Current SSDA approaches usually aim…

Computer Vision and Pattern Recognition · Computer Science 2023-03-28 Yu-Chu Yu , Hsuan-Tien Lin

Unsupervised domain adaptation (UDA) has been vastly explored to alleviate domain shifts between source and target domains, by applying a well-performed model in an unlabeled target domain via supervision of a labeled source domain. Recent…

Computer Vision and Pattern Recognition · Computer Science 2022-09-27 Xiaofeng Liu , Fangxu Xing , Nadya Shusharina , Ruth Lim , C-C Jay Kuo , Georges El Fakhri , Jonghye Woo

One of the primary challenges in Semi-supervised Domain Adaptation (SSDA) is the skewed ratio between the number of labeled source and target samples, causing the model to be biased towards the source domain. Recent works in SSDA show that…

Computer Vision and Pattern Recognition · Computer Science 2022-09-07 Abhay Rawat , Isha Dua , Saurav Gupta , Rahul Tallamraju

We address the computational and theoretical limitations of current distributional alignment methods for source-free unsupervised domain adaptation (SFUDA) using source class-mean features. In particular, we focus on estimating…

Machine Learning · Computer Science 2026-04-30 Yiming Zhang , Sitong Liu , Alex Cloninger

Unbalanced Optimal Transport (UOT) has emerged as a robust relaxation of standard Optimal Transport, particularly effective for handling outliers and mass variations. However, scalable algorithms for UOT, specifically those based on…

Optimization and Control · Mathematics 2026-02-12 Ferdinand Genans

Given the rapidly changing machine learning environments and expensive data labeling, semi-supervised domain adaptation (SSDA) is imperative when the labeled data from the source domain is statistically different from the partially labeled…

Machine Learning · Computer Science 2022-07-27 Madhureeta Das , Xianhao Chen , Xiaoyong Yuan , Lan Zhang

It is common in computer vision to be confronted with domain shift: images which have the same class but different acquisition conditions. In domain adaptation (DA), one wants to classify unlabeled target images using source labeled images.…

Computer Vision and Pattern Recognition · Computer Science 2022-06-23 Kilian Fatras , Hiroki Naganuma , Ioannis Mitliagkas

Partial domain adaptation (PDA) attracts appealing attention as it deals with a realistic and challenging problem when the source domain label space substitutes the target domain. Most conventional domain adaptation (DA) efforts concentrate…

Computer Vision and Pattern Recognition · Computer Science 2020-08-28 Taotao Jing , Haifeng Xia , Zhengming Ding

In this paper, we propose a novel approach for unsupervised domain adaptation, that relates notions of optimal transport, learning probability measures and unsupervised learning. The proposed approach, HOT-DA, is based on a hierarchical…

Computer Vision and Pattern Recognition · Computer Science 2022-10-11 Mourad El Hamri , Younès Bennani , Issam Falih , Hamid Ahaggach

Partial domain adaptation (PDA) is a challenging task in real-world machine learning scenarios. It aims to transfer knowledge from a labeled source domain to a related unlabeled target domain, where the support set of the source label…

Machine Learning · Computer Science 2025-07-29 Cheng-Jun Guo , Chuan-Xian Ren , You-Wei Luo , Xiao-Lin Xu , Hong Yan

Unsupervised domain adaptation~(UDA) aims at reducing the distribution discrepancy when transferring knowledge from a labeled source domain to an unlabeled target domain. Previous UDA methods assume that the source and target domains share…

Computer Vision and Pattern Recognition · Computer Science 2020-08-26 Chuan-Xian Ren , Pengfei Ge , Peiyi Yang , Shuicheng Yan

Partial Domain Adaptation (PDA) is a practical and general domain adaptation scenario, which relaxes the fully shared label space assumption such that the source label space subsumes the target one. The key challenge of PDA is the issue of…

Computer Vision and Pattern Recognition · Computer Science 2021-07-13 Yuecong Xu , Jianfei Yang , Haozhi Cao , Qi Li , Kezhi Mao , Zhenghua Chen

We address the problem of unsupervised domain adaptation under the setting of generalized target shift (joint class-conditional and label shifts). For this framework, we theoretically show that, for good generalization, it is necessary to…

Machine Learning · Computer Science 2021-10-20 Alain Rakotomamonjy , Rémi Flamary , Gilles Gasso , Mokhtar Z. Alaya , Maxime Berar , Nicolas Courty

Neural network-based optimal transport (OT) is a recent and fruitful direction in the generative modeling community. It finds its applications in various fields such as domain translation, image super-resolution, computational biology and…

Machine Learning · Computer Science 2026-02-25 Roman Tarasov , Petr Mokrov , Milena Gazdieva , Evgeny Burnaev , Alexander Korotin

Unsupervised sim-to-real domain adaptation (UDA) for semantic segmentation aims to improve the real-world test performance of a model trained on simulated data. It can save the cost of manually labeling data in real-world applications such…

Computer Vision and Pattern Recognition · Computer Science 2022-12-15 Rui Gong , Qin Wang , Dengxin Dai , Luc Van Gool

Domain Adaptation aims to transfer the knowledge learned from a labeled source domain to an unlabeled target domain whose data distributions are different. However, the training data in source domain required by most of the existing methods…

Computer Vision and Pattern Recognition · Computer Science 2023-06-02 Ning Ding , Yixing Xu , Yehui Tang , Chao Xu , Yunhe Wang , Dacheng Tao

Adapting machine learning models to new domains without labeled data, especially when source data is inaccessible, is a critical challenge in applications like medical imaging, autonomous driving, and remote sensing. This task, known as…

Computer Vision and Pattern Recognition · Computer Science 2024-12-24 Ruiqiang Xiao , Songning Lai , Yijun Yang , Jiemin Wu , Yutao Yue , Lei Zhu

Domain adaptation (DA) tries to tackle the scenarios when the test data does not fully follow the same distribution of the training data, and multi-source domain adaptation (MSDA) is very attractive for real world applications. By learning…

Machine Learning · Computer Science 2024-01-17 Jin Yuan , Feng Hou , Yangzhou Du , Zhongchao Shi , Xin Geng , Jianping Fan , Yong Rui