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Recent studies on facial expression editing have obtained very promising progress. On the other hand, existing methods face the constraint of requiring a large amount of expression labels which are often expensive and time-consuming to…

Computer Vision and Pattern Recognition · Computer Science 2020-07-20 Rongliang Wu , Shijian Lu

Source-free domain adaptation (SFDA) aims to adapt a model trained on labelled data in a source domain to unlabelled data in a target domain without access to the source-domain data during adaptation. Existing methods for SFDA leverage…

Machine Learning · Computer Science 2022-03-18 Cian Eastwood , Ian Mason , Christopher K. I. Williams , Bernhard Schölkopf

Unsupervised domain adaptation (UDA) assumes that source and target domain data are freely available and usually trained together to reduce the domain gap. However, considering the data privacy and the inefficiency of data transmission, it…

Computer Vision and Pattern Recognition · Computer Science 2020-12-11 Xianfeng Li , Weijie Chen , Di Xie , Shicai Yang , Peng Yuan , Shiliang Pu , Yueting Zhuang

Resting-state functional MRI (rs-fMRI) is increasingly employed in multi-site research to aid neurological disorder analysis. Existing studies usually suffer from significant cross-site/domain data heterogeneity caused by site effects such…

Computer Vision and Pattern Recognition · Computer Science 2023-08-25 Yuqi Fang , Jinjian Wu , Qianqian Wang , Shijun Qiu , Andrea Bozoki , Huaicheng Yan , Mingxia Liu

Given labeled data in a source domain, unsupervised domain adaptation has been widely adopted to generalize models for unlabeled data in a target domain, whose data distributions are different. However, existing works are inapplicable to…

Computer Vision and Pattern Recognition · Computer Science 2022-04-12 Weiming Zhuang , Xin Gan , Yonggang Wen , Xuesen Zhang , Shuai Zhang , Shuai Yi

Source-free domain adaptation (SFDA) is a challenging task that tackles domain shifts using only a pre-trained source model and unlabeled target data. Existing SFDA methods are restricted by the fundamental limitation of source-target…

Computer Vision and Pattern Recognition · Computer Science 2025-10-30 Yuyang Huang , Yabo Chen , Junyu Zhou , Wenrui Dai , Xiaopeng Zhang , Junni Zou , Hongkai Xiong , Qi Tian

Domain adaptation (DA) aims to alleviate the domain shift between source domain and target domain. Most DA methods require access to the source data, but often that is not possible (e.g. due to data privacy or intellectual property). In…

Computer Vision and Pattern Recognition · Computer Science 2021-11-30 Shiqi Yang , Yaxing Wang , Joost van de Weijer , Luis Herranz , Shangling Jui

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

Source-free domain adaptation (SFDA) aims to adapt a well-trained source model to an unlabelled target domain without accessing the source dataset, making it applicable in a variety of real-world scenarios. Existing SFDA methods ONLY assess…

Computer Vision and Pattern Recognition · Computer Science 2023-10-10 Longxiang Tang , Kai Li , Chunming He , Yulun Zhang , Xiu Li

In this paper, we study the task of source-free domain adaptation (SFDA), where the source data are not available during target adaptation. Previous works on SFDA mainly focus on aligning the cross-domain distributions. However, they ignore…

Computer Vision and Pattern Recognition · Computer Science 2021-06-01 Guanglei Yang , Hao Tang , Zhun Zhong , Mingli Ding , Ling Shao , Nicu Sebe , Elisa Ricci

Effective object detection in autonomous vehicles is challenged by deployment in diverse and unfamiliar environments. Online Source-Free Domain Adaptation (O-SFDA) offers model adaptation using a stream of unlabeled data from a target…

Computer Vision and Pattern Recognition · Computer Science 2024-09-02 Xiangyu Shi , Yanyuan Qiao , Qi Wu , Lingqiao Liu , Feras Dayoub

Source-free domain adaptation (SFDA) provides a practical solution to cross-subject EEG decoding by adapting source-pretrained models to unlabeled target domains without accessing source data. However, existing SFDA methods rely solely on…

Signal Processing · Electrical Eng. & Systems 2026-05-05 Peiliang Gong , Han Zhang , Zhen Jiang , Chenyu Liu , Ziyu Jia , Xinliang Zhou , Daoqiang Zhang , Xiaoli Li

We consider the problem of source-free unsupervised category-level pose estimation from only RGB images to a target domain without any access to source domain data or 3D annotations during adaptation. Collecting and annotating real-world 3D…

Computer Vision and Pattern Recognition · Computer Science 2024-01-22 Prakhar Kaushik , Aayush Mishra , Adam Kortylewski , Alan Yuille

A good feature representation is the key to image classification. In practice, image classifiers may be applied in scenarios different from what they have been trained on. This so-called domain shift leads to a significant performance drop…

Computer Vision and Pattern Recognition · Computer Science 2024-01-10 Zhize Wu , Changjiang Du , Le Zou , Ming Tan , Tong Xu , Fan Cheng , Fudong Nian , Thomas Weise

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

Domain Adaptation (DA) is important for deep learning-based medical image segmentation models to deal with testing images from a new target domain. As the source-domain data are usually unavailable when a trained model is deployed at a new…

Computer Vision and Pattern Recognition · Computer Science 2023-11-22 Jianghao Wu , Guotai Wang , Ran Gu , Tao Lu , Yinan Chen , Wentao Zhu , Tom Vercauteren , Sébastien Ourselin , Shaoting Zhang

Facial expression recognition relies on facial data that inherently expose identity and thus raise significant privacy concerns. Current privacy-preserving methods typically fail in realistic open-set video settings where identities are…

Computer Vision and Pattern Recognition · Computer Science 2026-03-26 Feng Xu , Xun Li , Lars Petersson , Yulei Sui , David Ahmedt-Aristizabal , Dadong Wang

We study a practical domain adaptation task, called source-free unsupervised domain adaptation (UDA) problem, in which we cannot access source domain data due to data privacy issues but only a pre-trained source model and unlabeled target…

Computer Vision and Pattern Recognition · Computer Science 2021-06-30 Zhen Qiu , Yifan Zhang , Hongbin Lin , Shuaicheng Niu , Yanxia Liu , Qing Du , Mingkui Tan

In-the-wild dynamic facial expression recognition (DFER) encounters a significant challenge in recognizing emotion-related expressions, which are often temporally and spatially diluted by emotion-irrelevant expressions and global context.…

Computer Vision and Pattern Recognition · Computer Science 2024-12-19 Xingjian Wang , Li Chai

The domain diversities including inconsistent annotation and varied image collection conditions inevitably exist among different facial expression recognition (FER) datasets, which pose an evident challenge for adapting the FER model…

Computer Vision and Pattern Recognition · Computer Science 2021-03-19 Kai Wang , Yuxin Gu , Xiaojiang Peng , Panpan Zhang , Baigui Sun , Hao Li