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Unsupervised domain adaptation (UDA) has been a vital protocol for migrating information learned from a labeled source domain to facilitate the implementation in an unlabeled heterogeneous target domain. Although UDA is typically jointly…

Computer Vision and Pattern Recognition · Computer Science 2022-09-19 Xiaofeng Liu , Fangxu Xing , Georges El Fakhri , Jonghye Woo

Person Re-Identification (re-ID) aims at retrieving images of the same person taken by different cameras. A challenge for re-ID is the performance preservation when a model is used on data of interest (target data) which belong to a…

Computer Vision and Pattern Recognition · Computer Science 2020-09-22 Fabian Dubourvieux , Romaric Audigier , Angelique Loesch , Samia Ainouz , Stephane Canu

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

Supervised deep learning usually faces more challenges in medical images than in natural images. Since annotations in medical images require the expertise of doctors and are more time-consuming and expensive. Thus, some researchers turn to…

Computer Vision and Pattern Recognition · Computer Science 2025-02-25 Tao Yang , Lisheng Wang

Despite its significant success, object detection in traffic and transportation scenarios requires time-consuming and laborious efforts in acquiring high-quality labeled data. Therefore, Unsupervised Domain Adaptation (UDA) for object…

Computer Vision and Pattern Recognition · Computer Science 2025-07-02 Zehua Fu , Chenguang Liu , Yuyu Chen , Jiaqi Zhou , Qingjie Liu , Yunhong Wang

We introduce an unsupervised domain adaption (UDA) strategy that combines multiple image translations, ensemble learning and self-supervised learning in one coherent approach. We focus on one of the standard tasks of UDA in which a semantic…

Computer Vision and Pattern Recognition · Computer Science 2021-07-14 Fabrizio J. Piva , Gijs Dubbelman

Annotation-efficient segmentation of the numerous mitochondria instances from various electron microscopy (EM) images is highly valuable for biological and neuroscience research. Although unsupervised domain adaptation (UDA) methods can…

Computer Vision and Pattern Recognition · Computer Science 2026-05-04 Shan Xiong , Jiabao Chen , Ye Wang , Jialin Peng

In this work, we propose an unsupervised domain adaptation (UDA) framework for 3D volumetric lesion detection that adapts a detector trained on labeled FDG PET/CT to unlabeled PSMA PET/CT. Beyond covariate shift, cross tracer adaptation…

Image and Video Processing · Electrical Eng. & Systems 2026-03-17 Xiaofeng Liu , Menghua Xia , Yanis Chemli , Georges El Fakhri , Chi Liu , Jinsong Ouyang

Recent deep networks achieved state of the art performance on a variety of semantic segmentation tasks. Despite such progress, these models often face challenges in real world `wild tasks' where large difference between labeled…

Computer Vision and Pattern Recognition · Computer Science 2018-10-26 Yang Zou , Zhiding Yu , B. V. K. Vijaya Kumar , Jinsong Wang

We address the Unsupervised Domain Adaptation (UDA) problem in image classification from a new perspective. In contrast to most existing works which either align the data distributions or learn domain-invariant features, we directly learn a…

Computer Vision and Pattern Recognition · Computer Science 2020-12-03 Qian Wang , Fanlin Meng , Toby P. Breckon

Recent works on unsupervised domain adaptation (UDA) focus on the selection of good pseudo-labels as surrogates for the missing labels in the target data. However, source domain bias that deteriorates the pseudo-labels can still exist since…

Computer Vision and Pattern Recognition · Computer Science 2022-05-31 Can Zhang , Gim Hee Lee

Unsupervised Domain Adaptation (UDA) methods for person Re-Identification (Re-ID) rely on target domain samples to model the marginal distribution of the data. To deal with the lack of target domain labels, UDA methods leverage information…

Computer Vision and Pattern Recognition · Computer Science 2021-01-06 Tiago de C. G. Pereira , Teofilo E. de Campos

Deep learning has achieved remarkable success in medicalimage segmentation, but it usually requires a large numberof images labeled with fine-grained segmentation masks, andthe annotation of these masks can be very expensive…

Computer Vision and Pattern Recognition · Computer Science 2021-08-31 Yanwu Xu , Mingming Gong , Shaoan Xie , Kayhan Batmanghelich

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

Domain shift has been a long-standing issue for medical image segmentation. Recently, unsupervised domain adaptation (UDA) methods have achieved promising cross-modality segmentation performance by distilling knowledge from a label-rich…

Image and Video Processing · Electrical Eng. & Systems 2023-03-29 Ziyuan Zhao , Kaixin Xu , Huai Zhe Yeo , Xulei Yang , Cuntai Guan

Domain shift is a commonly encountered issue in medical imaging solutions, primarily caused by variations in imaging devices and data sources. To mitigate this problem, unsupervised domain adaptation techniques have been employed. However,…

Computer Vision and Pattern Recognition · Computer Science 2023-08-29 Yanyu Ye , Zhengxi Zhang , Chunna Tianb , Wei wei

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

Unsupervised Domain Adaptation (UDA) aims to solve the problem of label scarcity of the target domain by transferring the knowledge from the label rich source domain. Usually, the source domain consists of synthetic images for which the…

Computer Vision and Pattern Recognition · Computer Science 2023-08-14 Anant Khandelwal

Recent advances in unsupervised domain adaptation (UDA) show that transferable prototypical learning presents a powerful means for class conditional alignment, which encourages the closeness of cross-domain class centroids. However, the…

Computer Vision and Pattern Recognition · Computer Science 2021-01-12 Xiaofeng Liu , Xiongchang Liu , Bo Hu , Wenxuan Ji , Fangxu Xing , Jun Lu , Jane You , C. -C. Jay Kuo , Georges El Fakhri , Jonghye Woo

Standard Unsupervised Domain Adaptation (UDA) methods assume the availability of both source and target data during the adaptation. In this work, we investigate Source-free Unsupervised Domain Adaptation (SF-UDA), a specific case of UDA…

Computer Vision and Pattern Recognition · Computer Science 2023-03-20 Mattia Litrico , Alessio Del Bue , Pietro Morerio