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Source-free unsupervised domain adaptation (SFUDA) has gained significant attention as an alternative to traditional unsupervised domain adaptation (UDA), which relies on the constant availability of labeled source data. However, SFUDA…

Machine Learning · Computer Science 2025-02-21 Gengxu Li , Yuan Wu

Source-Free Domain Adaptation (SFDA) is emerging as a compelling solution for medical image segmentation under privacy constraints, yet current approaches often ignore sample difficulty and struggle with noisy supervision under domain…

Computer Vision and Pattern Recognition · Computer Science 2025-10-30 Quang-Khai Bui-Tran , Thanh-Huy Nguyen , Hoang-Thien Nguyen , Ba-Thinh Lam , Nguyen Lan Vi Vu , Phat K. Huynh , Ulas Bagci , Min Xu

Medical image segmentation models face severe performance drops under domain shifts, especially when data sharing constraints prevent access to source images. We present a novel Uncertainty-aware Progressive Pseudo-label Denoising (UP2D)…

Image and Video Processing · Electrical Eng. & Systems 2025-11-03 Quang-Khai Bui-Tran , Thanh-Huy Nguyen , Manh D. Ho , Thinh B. Lam , Vi Vu , Hoang-Thien Nguyen , Phat Huynh , Ulas Bagci

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

Source-Free Domain Adaptation (SFDA) aims to adapt a pre-trained source model to an unlabeled target domain without access to source data. Recent advances in Foundation Models (FMs) have introduced new opportunities for leveraging external…

Computer Vision and Pattern Recognition · Computer Science 2025-11-25 Huisoo Lee , Jisu Han , Hyunsouk Cho , Wonjun Hwang

Domain adaptation aims to bridge the domain shifts between the source and the target domain. These shifts may span different dimensions such as fog, rainfall, etc. However, recent methods typically do not consider explicit prior knowledge…

Computer Vision and Pattern Recognition · Computer Science 2022-12-07 Qianyu Zhou , Qiqi Gu , Jiangmiao Pang , Xuequan Lu , Lizhuang Ma

Distribution shifts widely exist in medical images acquired from different medical centres, hindering the deployment of semantic segmentation models trained on one centre (source domain) to another (target domain). While unsupervised domain…

Computer Vision and Pattern Recognition · Computer Science 2024-12-17 Ziyang Chen , Yiwen Ye , Yongsheng Pan , Jingfeng Zhang , Yanning Zhang , Yong Xia

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) aims to transfer a trained source model to the unlabeled target domain without accessing the source data. However, the SFDA setting faces an effect bottleneck due to the absence of source data and target…

Machine Learning · Computer Science 2022-05-24 Fan Wang , Zhongyi Han , Zhiyan Zhang , Yilong Yin

Source-free Unsupervised Domain Adaptation (SF-UDA) aims to adapt a well-trained source model to an unlabeled target domain without access to the source data. One key challenge is the lack of source data during domain adaptation. To handle…

Computer Vision and Pattern Recognition · Computer Science 2023-05-23 Hongbin Lin , Mingkui Tan , Yifan Zhang , Zhen Qiu , Shuaicheng Niu , Dong Liu , Qing Du , Yanxia Liu

Test-time adaptation (TTA) has recently emerged as a promising approach for improving time series forecasting (TSF) under distribution shift. Existing TSF-TTA methods differ in how they utilize revealed targets, yet the resulting adaptation…

Machine Learning · Computer Science 2026-05-19 Haochun Wang , Ruichen Xu , Georgios Kementzidis , Karen Cho , Sebastian Ramirez Villarreal , Yuefan Deng

Fully test-time adaptation (FTTA) adapts a model that is trained on a source domain to a target domain during the testing phase, where the two domains follow different distributions and source data is unavailable during the training phase.…

Artificial Intelligence · Computer Science 2023-12-15 Houcheng Su , Daixian Liu , Mengzhu Wang , Wei Wang

Source-free domain adaptation (SFDA) utilizes a pre-trained source model with unlabeled target data. Self-supervised SFDA techniques generate pseudolabels from the pre-trained source model, but these pseudolabels often contain noise due to…

Computer Vision and Pattern Recognition · Computer Science 2025-01-14 Shivangi Rai , Rini Smita Thakur , Kunal Jangid , Vinod K Kurmi

Source-free domain adaptation aims to adapt a source-trained model to an unlabeled target domain without access to the source data. It has attracted growing attention in recent years, where existing approaches focus on self-training that…

Computer Vision and Pattern Recognition · Computer Science 2024-11-01 Idit Diamant , Amir Rosenfeld , Idan Achituve , Jacob Goldberger , Arnon Netzer

Domain adaptation (DA) addresses the challenge of transferring knowledge from a source domain to a target domain where image data distributions may differ. Existing DA methods often require access to source domain data, adversarial…

Computer Vision and Pattern Recognition · Computer Science 2026-01-29 Debopom Sutradhar , Md. Abdur Rahman , Mohaimenul Azam Khan Raiaan , Reem E. Mohamed , Sami Azam

Real-world systems often encounter new data over time, which leads to experiencing target domain shifts. Existing Test-Time Adaptation (TTA) methods tend to apply computationally heavy and memory-intensive backpropagation-based approaches…

Computer Vision and Pattern Recognition · Computer Science 2024-04-26 Yanshuo Wang , Ali Cheraghian , Zeeshan Hayder , Jie Hong , Sameera Ramasinghe , Shafin Rahman , David Ahmedt-Aristizabal , Xuesong Li , Lars Petersson , Mehrtash Harandi

Recently, source-free unsupervised domain adaptation (SFUDA) has emerged as a more practical and feasible approach compared to unsupervised domain adaptation (UDA) which assumes that labeled source data are always accessible. However,…

Computer Vision and Pattern Recognition · Computer Science 2023-04-25 Suho Lee , Seungwon Seo , Jihyo Kim , Yejin Lee , Sangheum Hwang

Real-world time series often exhibit a non-stationary nature, degrading the performance of pre-trained forecasting models. Test-Time Adaptation (TTA) addresses this by adjusting models during inference, but existing methods typically update…

Machine Learning · Computer Science 2025-07-01 Heitor R. Medeiros , Hossein Sharifi-Noghabi , Gabriel L. Oliveira , Saghar Irandoust

Source-Free Domain Adaptation (SFDA) aims to adapt a source model for a target domain, with only access to unlabeled target training data and the source model pre-trained on a supervised source domain. Relying on pseudo labeling and/or…

Computer Vision and Pattern Recognition · Computer Science 2024-03-14 Song Tang , Wenxin Su , Mao Ye , Xiatian Zhu

The proliferation of mobile devices generates a massive volume of time series across various domains, where effective time series forecasting enables a variety of real-world applications. This study focuses on a new problem of source-free…

Machine Learning · Computer Science 2025-11-03 Kangjia Yan , Chenxi Liu , Hao Miao , Xinle Wu , Yan Zhao , Chenjuan Guo , Bin Yang