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From a service perspective, Multi-Source Domain Adaptation (MSDA) is a promising scenario to adapt a deployed model to a client's dataset. It can provide adaptation without a target label and support the case where a source dataset is…

Machine Learning · Computer Science 2023-07-07 Eunju Yang , Gyusang Cho , Chan-Hyun Youn

Unsupervised video domain adaptation (UVDA) is a practical but under-explored problem. In this paper, we propose a frustratingly easy UVDA method, called MetaTrans. Specifically, MetaTrans adopts a concise learning objective that contains…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Pengfei Wei , Yiqun Sun , Zhiqiang Xu , Yiping Ke , Lawrence B. Hsieh

This work proposes a robust Partial Domain Adaptation (PDA) framework that mitigates the negative transfer problem by incorporating a robust target-supervision strategy. It leverages ensemble learning and includes diverse, complementary…

Computer Vision and Pattern Recognition · Computer Science 2023-09-11 Sandipan Choudhuri , Suli Adeniye , Arunabha Sen

In the pursuit of transferring a source model to a target domain without access to the source training data, Source-Free Domain Adaptation (SFDA) has been extensively explored across various scenarios, including Closed-set, Open-set,…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Song Tang , Wenxin Su , Mao Ye , Boyu Wang , Xiatian Zhu

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

Unsupervised domain adaptation (UDA) aims to learn transferable knowledge from a labeled source domain and adapts a trained model to an unlabeled target domain. To bridge the gap between source and target domains, one prevailing strategy is…

Computer Vision and Pattern Recognition · Computer Science 2022-03-01 Xu Ma , Junkun Yuan , Yen-wei Chen , Ruofeng Tong , Lanfen Lin

Traditional test-time adaptation (TTA) methods face significant challenges in adapting to dynamic environments characterized by continuously changing long-term target distributions. These challenges primarily stem from two factors:…

Machine Learning · Computer Science 2023-11-10 Fahim Faisal Niloy , Sk Miraj Ahmed , Dripta S. Raychaudhuri , Samet Oymak , Amit K. Roy-Chowdhury

Multi-Source Unsupervised Domain Adaptation (multi-source UDA) aims to learn a model from several labeled source domains while performing well on a different target domain where only unlabeled data are available at training time. To align…

Computer Vision and Pattern Recognition · Computer Science 2021-09-28 Marin Scalbert , Maria Vakalopoulou , Florent Couzinié-Devy

Facial expression recognition (FER) models are widely used in video-based affective computing applications, such as human-computer interaction and healthcare monitoring. However, deep FER models often struggle with subtle expressions and…

Source-free active domain adaptation (SFADA) enhances knowledge transfer from a source model to an unlabeled target domain using limited manual labels selected via active learning. While recent domain adaptation studies have introduced…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Xi Chen , Hongxun Yao , Zhaopan Xu , Kui Jiang

Unsupervised domain adaptation (UDA) has been a potent technique to handle the lack of annotations in the target domain, particularly in semantic segmentation task. This study introduces a different UDA scenarios where the target domain…

Computer Vision and Pattern Recognition · Computer Science 2024-04-16 Fei Pan , Xu Yin , Seokju Lee , Axi Niu , Sungeui Yoon , In So Kweon

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

In this paper, we investigate Source-free Open-partial Domain Adaptation (SF-OPDA), which addresses the situation where there exist both domain and category shifts between source and target domains. Under the SF-OPDA setting, which aims to…

Computer Vision and Pattern Recognition · Computer Science 2023-01-12 Shiqi Yang , Yaxing Wang , Kai Wang , Shangling Jui , Joost van de Weijer

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

Conventional unsupervised domain adaptation (UDA) assumes that training data are sampled from a single domain. This neglects the more practical scenario where training data are collected from multiple sources, requiring multi-source domain…

Computer Vision and Pattern Recognition · Computer Science 2019-08-29 Xingchao Peng , Qinxun Bai , Xide Xia , Zijun Huang , Kate Saenko , Bo Wang

Video temporal grounding is an emerging topic aiming to identify specific clips within videos. In addition to pre-trained video models, contemporary methods utilize pre-trained vision-language models (VLM) to capture detailed…

Computer Vision and Pattern Recognition · Computer Science 2024-08-14 Yubin Wang , Xinyang Jiang , De Cheng , Dongsheng Li , Cairong Zhao

Recent LiDAR-based 3D Object Detection (3DOD) methods show promising results, but they often do not generalize well to target domains outside the source (or training) data distribution. To reduce such domain gaps and thus to make 3DOD…

Computer Vision and Pattern Recognition · Computer Science 2024-03-08 Gyusam Chang , Wonseok Roh , Sujin Jang , Dongwook Lee , Daehyun Ji , Gyeongrok Oh , Jinsun Park , Jinkyu Kim , Sangpil Kim

Source-Free Unsupervised Domain Adaptation (SFUDA) addresses the realistic challenge of adapting a source-trained model to a target domain without access to the source data, driven by concerns over privacy and cost. Existing SFUDA methods…

Computer Vision and Pattern Recognition · Computer Science 2025-10-07 Jiaping Yu , Muli Yang , Jiapeng Ji , Jiexi Yan , Cheng Deng

Source-free object detection (SFOD) aims to transfer a detector pre-trained on a label-rich source domain to an unlabeled target domain without seeing source data. While most existing SFOD methods generate pseudo labels via a…

Computer Vision and Pattern Recognition · Computer Science 2023-01-12 Qiaosong Chu , Shuyan Li , Guangyi Chen , Kai Li , Xiu Li

Personalized facial expression recognition (FER) involves adapting a machine learning model using samples from labeled sources and unlabeled target domains. Given the challenges of recognizing subtle expressions with considerable…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Muhammad Osama Zeeshan , Marco Pedersoli , Alessandro Lameiras Koerich , Eric Granger