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By leveraging data from a fully labeled source domain, unsupervised domain adaptation (UDA) improves classification performance on an unlabeled target domain through explicit discrepancy minimization of data distribution or adversarial…

Computer Vision and Pattern Recognition · Computer Science 2021-12-06 Shengjia Zhang , Tiancheng Lin , Yi Xu

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

Semantic segmentation provides pixel-level scene understanding essential for autonomous driving and fine-grained perception tasks. However, training segmentation models requires costly, labor-intensive annotations on real-world datasets.…

Computer Vision and Pattern Recognition · Computer Science 2026-05-06 Yerin Cheon , Aruna Balasubramanian , Francois Rameau

We propose a simple but effective source-free domain adaptation (SFDA) method. Treating SFDA as an unsupervised clustering problem and following the intuition that local neighbors in feature space should have more similar predictions than…

Computer Vision and Pattern Recognition · Computer Science 2022-10-05 Shiqi Yang , Yaxing Wang , Kai Wang , Shangling Jui , Joost van de Weijer

Domain adaptation typically requires to access source domain data to utilize their distribution information for domain alignment with the target data. However, in many real-world scenarios, the source data may not be accessible during the…

Image and Video Processing · Electrical Eng. & Systems 2021-09-22 Cheng Chen , Quande Liu , Yueming Jin , Qi Dou , Pheng-Ann Heng

In theory, the success of unsupervised domain adaptation (UDA) largely relies on domain gap estimation. However, for source free UDA, the source domain data can not be accessed during adaptation, which poses great challenge of measuring the…

Computer Vision and Pattern Recognition · Computer Science 2022-10-04 Ziyang Zong , Jun He , Lei Zhang , Hai Huan

Source-free domain adaptation (SFDA) for segmentation aims at adapting a model trained in the source domain to perform well in the target domain with only the source model and unlabeled target data. Inspired by the recent success of Segment…

Computer Vision and Pattern Recognition · Computer Science 2025-07-15 Zheang Huai , Hui Tang , Yi Li , Zhuangzhuang Chen , Xiaomeng Li

We present a novel approach for unsupervised road segmentation in adverse weather conditions such as rain or fog. This includes a new algorithm for source-free domain adaptation (SFDA) using self-supervised learning. Moreover, our approach…

Computer Vision and Pattern Recognition · Computer Science 2025-02-13 Divya Kothandaraman , Rohan Chandra , Dinesh Manocha

The domain discrepancy existed between medical images acquired in different situations renders a major hurdle in deploying pre-trained medical image segmentation models for clinical use. Since it is less possible to distribute training data…

Computer Vision and Pattern Recognition · Computer Science 2022-11-22 Shishuai Hu , Zehui Liao , Yong Xia

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

We investigate a practical domain adaptation task, called source-free domain adaptation (SFUDA), where the source-pretrained model is adapted to the target domain without access to the source data. Existing techniques mainly leverage…

Computer Vision and Pattern Recognition · Computer Science 2022-11-15 Ziyi Zhang , Weikai Chen , Hui Cheng , Zhen Li , Siyuan Li , Liang Lin , Guanbin Li

Unsupervised Graph Domain Adaptation (UGDA) has emerged as a practical solution to transfer knowledge from a label-rich source graph to a completely unlabelled target graph. However, most methods require a labelled source graph to provide…

Machine Learning · Computer Science 2024-03-05 Zhen Zhang , Meihan Liu , Anhui Wang , Hongyang Chen , Zhao Li , Jiajun Bu , Bingsheng He

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

Unsupervised domain adaptation (UDA) involves learning class semantics from labeled data within a source domain that generalize to an unseen target domain. UDA methods are particularly impactful for semantic segmentation, where annotations…

Computer Vision and Pattern Recognition · Computer Science 2025-07-11 Cristina Mata , Kanchana Ranasinghe , Michael S. Ryoo

Unsupervised Domain Adaptation (UDA) aims to adapt models trained on a source domain to a new target domain where no labelled data is available. In this work, we investigate the problem of UDA from a synthetic computer-generated domain to a…

Computer Vision and Pattern Recognition · Computer Science 2021-11-29 Stephan Brehm , Sebastian Scherer , Rainer Lienhart

Source-free domain adaptation (SFDA) aims to adapt a classifier to an unlabelled target data set by only using a pre-trained source model. However, the absence of the source data and the domain shift makes the predictions on the target data…

Computer Vision and Pattern Recognition · Computer Science 2022-08-17 Subhankar Roy , Martin Trapp , Andrea Pilzer , Juho Kannala , Nicu Sebe , Elisa Ricci , Arno Solin

Semantic segmentation is a critical step in automated image interpretation and analysis where pixels are classified into one or more predefined semantically meaningful classes. Deep learning approaches for semantic segmentation rely on…

Computer Vision and Pattern Recognition · Computer Science 2023-07-10 Tushar Kataria , Beatrice Knudsen , Shireen Elhabian

The success of deep convolutional neural networks (DCNNs) benefits from high volumes of annotated data. However, annotating medical images is laborious, expensive, and requires human expertise, which induces the label scarcity problem.…

Image and Video Processing · Electrical Eng. & Systems 2022-03-24 Ziyuan Zhao , Kaixin Xu , Shumeng Li , Zeng Zeng , Cuntai Guan

Using synthetic data for training neural networks that achieve good performance on real-world data is an important task as it can reduce the need for costly data annotation. Yet, synthetic and real world data have a domain gap. Reducing…

Computer Vision and Pattern Recognition · Computer Science 2022-08-12 Shahaf Ettedgui , Shady Abu-Hussein , Raja Giryes

Domain Adaptation (DA) and Semi-supervised Learning (SSL) converge in Semi-supervised Domain Adaptation (SSDA), where the objective is to transfer knowledge from a source domain to a target domain using a combination of limited labeled…

Computer Vision and Pattern Recognition · Computer Science 2025-04-10 Hritam Basak , Zhaozheng Yin