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Source-free domain adaptation (SFDA) aims to adapt a source model trained on a fully-labeled source domain to an unlabeled target domain. Large-data pre-trained networks are used to initialize source models during source training, and…

Computer Vision and Pattern Recognition · Computer Science 2023-08-28 Wenyu Zhang , Li Shen , Chuan-Sheng Foo

In this paper, we propose a novel domain adaptation method for the source-free setting. In this setting, we cannot access source data during adaptation, while unlabeled target data and a model pretrained with source data are given. Due to…

Computer Vision and Pattern Recognition · Computer Science 2021-01-27 Masato Ishii , Masashi Sugiyama

Existing Source-free Unsupervised Domain Adaptation (SUDA) approaches inherently exhibit catastrophic forgetting. Typically, models trained on a labeled source domain and adapted to unlabeled target data improve performance on the target…

Computer Vision and Pattern Recognition · Computer Science 2023-04-18 Waqar Ahmed , Pietro Morerio , Vittorio Murino

Test-time adaptation harnesses test inputs to improve the accuracy of a model trained on source data when tested on shifted target data. Existing methods update the source model by (re-)training on each target domain. While effective,…

Machine Learning · Computer Science 2023-06-22 Jin Gao , Jialing Zhang , Xihui Liu , Trevor Darrell , Evan Shelhamer , Dequan Wang

Modern on-device neural network applications must operate under resource constraints while adapting to unpredictable domain shifts. However, this combined challenge-model compression and domain adaptation-remains largely unaddressed, as…

Computer Vision and Pattern Recognition · Computer Science 2025-05-28 Yoojin Kwon , Hongjun Suh , Wooseok Lee , Taesik Gong , Songyi Han , Hyung-Sin Kim

Cross-domain time series imputation is an underexplored data-centric research task that presents significant challenges, particularly when the target domain suffers from high missing rates and domain shifts in temporal dynamics. Existing…

Machine Learning · Computer Science 2025-06-17 Kexin Zhang , Baoyu Jing , K. Selçuk Candan , Dawei Zhou , Qingsong Wen , Han Liu , Kaize Ding

Unsupervised domain adaptation (UDA) aims to transfer knowledge from a related but different well-labeled source domain to a new unlabeled target domain. Most existing UDA methods require access to the source data, and thus are not…

Computer Vision and Pattern Recognition · Computer Science 2021-12-07 Jian Liang , Dapeng Hu , Yunbo Wang , Ran He , Jiashi Feng

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

Time-Series (TS) data has grown in importance with the rise of Internet of Things devices like sensors, but its labeling remains costly and complex. While Unsupervised Domain Adaptation (UDAs) offers an effective solution, growing data…

Machine Learning · Computer Science 2025-10-07 Yucheng Wang , Peiliang Gong , Min Wu , Felix Ott , Xiaoli Li , Lihua Xie , Zhenghua Chen

Unsupervised domain adaptation for semantic segmentation aims to make models trained on synthetic data (source domain) adapt to real images (target domain). Previous feature-level adversarial learning methods only consider adapting models…

Computer Vision and Pattern Recognition · Computer Science 2021-09-21 Hongruixuan Chen , Chen Wu , Yonghao Xu , Bo Du

Test-time adaptation (TTA) aims to improve the performance of source-domain pre-trained models on previously unseen, shifted target domains. Traditional TTA methods primarily adapt model weights based on target data streams, making model…

Computer Vision and Pattern Recognition · Computer Science 2024-12-17 Jiayi Guo , Junhao Zhao , Chaoqun Du , Yulin Wang , Chunjiang Ge , Zanlin Ni , Shiji Song , Humphrey Shi , Gao Huang

Source-free domain adaptation has become popular because of its practical usefulness and no need to access source data. However, the adaptation process still takes a considerable amount of time and is predominantly based on optimization…

Computer Vision and Pattern Recognition · Computer Science 2023-07-21 Ondrej Bohdal , Da Li , Timothy Hospedales

Most domain adaptation methods focus on single-source-single-target adaptation settings. Multi-target domain adaptation is a powerful extension in which a single classifier is learned for multiple unlabeled target domains. To build a…

Computer Vision and Pattern Recognition · Computer Science 2022-02-02 Sudipan Saha , Shan Zhao , Nasrullah Sheikh , Xiao Xiang Zhu

Machine learning models often struggle to generalize across domains with varying data distributions, such as differing noise levels, leading to degraded performance. Traditional strategies like personalized training, which trains separate…

Machine Learning · Computer Science 2026-04-07 Snehaa Reddy , Jayaprakash Katual , Satish Mulleti

Test-time adaptation (TTA) aims to adapt models to maintain reliable performance on non-stationary test streams without requiring labeled data. Despite its empirical success, the learnability of TTA under non-stationary streams remains…

Machine Learning · Computer Science 2026-05-28 Zhi Zhou , Ming Yang , Shi-Yu Tian , Kun-Yang Yu , Lan-Zhe Guo , Yu-Feng Li

Generalization across domains requires stable structure that links the source and target distributions. Building on causal transportability theory, we study a sequential prediction setting in which the target predictor can be represented as…

Machine Learning · Computer Science 2026-05-28 Kasra Jalaldoust , Elias Bareinboim

Domain adaptation seeks to mitigate the shift between training on the \emph{source} domain and testing on the \emph{target} domain. Most adaptation methods rely on the source data by joint optimization over source data and target data.…

Computer Vision and Pattern Recognition · Computer Science 2021-09-03 Dequan Wang , Shaoteng Liu , Sayna Ebrahimi , Evan Shelhamer , Trevor Darrell

Source-free domain adaptation (SFDA) aims to adapt a pretrained model from a labeled source domain to an unlabeled target domain without access to the source domain data, preserving source domain privacy. Despite its prevalence in visual…

Signal Processing · Electrical Eng. & Systems 2023-07-18 Mohamed Ragab , Emadeldeen Eldele , Min Wu , Chuan-Sheng Foo , Xiaoli Li , Zhenghua Chen

This paper focuses on the problem of semi-supervised domain adaptation for time-series forecasting, which is underexplored in literatures, despite being often encountered in practice. Existing methods on time-series domain adaptation mainly…

Machine Learning · Computer Science 2023-09-07 Zijian Li , Ruichu Cai , Tom Z. J Fu , Zhifeng Hao , Kun Zhang

Domain adaptation is a sub-field of machine learning that involves transferring knowledge from a source domain to perform the same task in the target domain. It is a typical challenge in machine learning that arises, e.g., when data is…

Machine Learning · Computer Science 2025-01-09 Philipp Spitzer , Dominik Martin , Laurin Eichberger , Niklas Kühl