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In the settings of conventional domain adaptation, categories of the source dataset are from the same domain (or domains for multi-source domain adaptation), which is not always true in reality. In this paper, we propose…

Machine Learning · Computer Science 2020-11-06 Sitong Mao , Keli Zhang , Fu-lai Chung

Source-free domain adaptation (SFDA) aims to adapt a source model trained on a fully-labeled source domain to a related but unlabeled target domain. While the source model is a key avenue for acquiring target pseudolabels, the generated…

Computer Vision and Pattern Recognition · Computer Science 2024-10-04 Wenyu Zhang , Li Shen , Chuan-Sheng Foo

Fine-tuning and Domain Adaptation emerged as effective strategies for efficiently transferring deep learning models to new target tasks. However, target domain labels are not accessible in many real-world scenarios. This led to the…

Machine Learning · Computer Science 2023-02-13 Andrea Maracani , Raffaello Camoriano , Elisa Maiettini , Davide Talon , Lorenzo Rosasco , Lorenzo Natale

Most unsupervised domain adaptation (UDA) methods assume that labeled source images are available during model adaptation. However, this assumption is often infeasible owing to confidentiality issues or memory constraints on mobile devices.…

Computer Vision and Pattern Recognition · Computer Science 2023-03-17 JoonHo Lee , Gyemin Lee

Deep learning models in computational pathology often fail to generalize across cohorts and institutions due to domain shift. Existing approaches either fail to leverage unlabeled data from the target domain or rely on image-to-image…

Computer Vision and Pattern Recognition · Computer Science 2026-01-27 Tengyue Zhang , Ruiwen Ding , Luoting Zhuang , Yuxiao Wu , Erika F. Rodriguez , William Hsu

Source-free domain adaptation (SFDA), which involves adapting models without access to source data, is both demanding and challenging. Existing SFDA techniques typically rely on pseudo-labels generated from confidence levels, leading to…

Computer Vision and Pattern Recognition · Computer Science 2025-04-24 Xinru Meng , Han Sun , Jiamei Liu , Ningzhong Liu , Huiyu Zhou

Weakly Supervised Object Localization (WSOL) models enable joint classification and region-of-interest localization in histology images using only image-class supervision. When deployed in a target domain, distributions shift remains a…

Computer Vision and Pattern Recognition · Computer Science 2026-03-16 Alexis Guichemerre , Banafsheh Karimian , Soufiane Belharbi , Natacha Gillet , Nicolas Thome , Pourya Shamsolmoali , Mohammadhadi Shateri , Luke McCaffrey , Eric Granger

Source-free domain adaptation (SFDA) alleviates the domain discrepancy among data obtained from domains without accessing the data for the awareness of data privacy. However, existing conventional SFDA methods face inherent limitations in…

Computer Vision and Pattern Recognition · Computer Science 2025-11-20 Yaxuan Song , Jianan Fan , Dongnan Liu , Weidong Cai

Multi-source unsupervised domain adaptation (MS-UDA) for sentiment analysis (SA) aims to leverage useful information in multiple source domains to help do SA in an unlabeled target domain that has no supervised information. Existing…

Computation and Language · Computer Science 2020-06-11 Yong Dai , Jian Liu , Xiancong Ren , Zenglin Xu

Source-Free Domain Adaptation (SFDA) addresses the challenge of adapting a model to a target domain without access to the data of the source domain. Prevailing methods typically start with a source model pre-trained with full supervision…

Computer Vision and Pattern Recognition · Computer Science 2025-09-15 Chirayu Agrawal , Snehasis Mukherjee

Multi-source domain adaptation (MSDA) plays an important role in industrial model generalization. Recent efforts on MSDA focus on enhancing multi-domain distributional alignment while omitting three issues, e.g., the class-level discrepancy…

Machine Learning · Computer Science 2024-12-24 Min Huang , Zifeng Xie , Bo Sun , Ning Wang

Source-free domain adaptation (SFDA) tackles the critical challenge of adapting source-pretrained models to unlabeled target domains without access to source data, overcoming data privacy and storage limitations in real-world applications.…

Computer Vision and Pattern Recognition · Computer Science 2026-01-14 Xi Chen , Hongxun Yao , Sicheng Zhao , Jiankun Zhu , Jing Jiang , Kui Jiang

Semi-Supervised Domain Adaptation (SSDA) leverages knowledge from a fully labeled source domain to classify data in a partially labeled target domain. Due to the limited number of labeled samples in the target domain, there can be intrinsic…

Computer Vision and Pattern Recognition · Computer Science 2026-01-28 Yuting Hong , Li Dong , Xiaojie Qiu , Hui Xiao , Baochen Yao , Siming Zheng , Chengbin Peng

Source-Free Domain Adaptation (SFDA) adapts pre-trained models to unlabeled target domains without requiring access to source data. Although state-of-the-art methods leveraging local neighborhood structures show promise for SFDA, they tend…

Computer Vision and Pattern Recognition · Computer Science 2026-03-20 Ying Zheng , Yiyi Zhang , Yi Wang , Lap-Pui Chau

Unsupervised domain adaptation (UDA) is one of the key technologies to solve a problem where it is hard to obtain ground truth labels needed for supervised learning. In general, UDA assumes that all samples from source and target domains…

Image and Video Processing · Electrical Eng. & Systems 2022-09-07 Satoshi Kondo

Domain adaptation (DA) aims to transfer the knowledge learned from a source domain to an unlabeled target domain. Some recent works tackle source-free domain adaptation (SFDA) where only a source pre-trained model is available for…

Computer Vision and Pattern Recognition · Computer Science 2021-10-11 Shiqi Yang , Yaxing Wang , Joost van de Weijer , Luis Herranz , Shangling Jui

Unsupervised Domain Adaptation (UDA) aims to learn a predictor model for an unlabeled domain by transferring knowledge from a separate labeled source domain. However, most of these conventional UDA approaches make the strong assumption of…

Machine Learning · Computer Science 2021-04-06 Sk Miraj Ahmed , Dripta S. Raychaudhuri , Sujoy Paul , Samet Oymak , Amit K. Roy-Chowdhury

It is desirable to transfer the knowledge stored in a well-trained source model onto non-annotated target domain in the absence of source data. However, state-of-the-art methods for source free domain adaptation (SFDA) are subject to strict…

Computer Vision and Pattern Recognition · Computer Science 2021-06-24 Xin Luo , Wei Chen , Yusong Tan , Chen Li , Yulin He , Xiaogang Jia

Unsupervised domain adaptation (UDA) transfers knowledge from a label-rich source domain to a fully-unlabeled target domain. To tackle this task, recent approaches resort to discriminative domain transfer in virtue of pseudo-labels to…

Computer Vision and Pattern Recognition · Computer Science 2019-05-21 Chaoqi Chen , Weiping Xie , Wenbing Huang , Yu Rong , Xinghao Ding , Yue Huang , Tingyang Xu , Junzhou Huang

Source-free Domain Adaptation (SFDA) aims to adapt a pre-trained source model to the unlabeled target domain without accessing the well-labeled source data, which is a much more practical setting due to the data privacy, security, and…

Computer Vision and Pattern Recognition · Computer Science 2022-07-19 Sanqing Qu , Guang Chen , Jing Zhang , Zhijun Li , Wei He , Dacheng Tao