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Recent years have witnessed the success of the deep learning-based technique in research of no-reference point cloud quality assessment (NR-PCQA). For a more accurate quality prediction, many previous studies have attempted to capture…

Computer Vision and Pattern Recognition · Computer Science 2024-12-03 Yujie Zhang , Qi Yang , Ziyu Shan , Yiling Xu

Unsupervised domain adaptation (UDA) aims to adapt a model trained on the source domain (e.g. synthetic data) to the target domain (e.g. real-world data) without requiring further annotations on the target domain. This work focuses on UDA…

Computer Vision and Pattern Recognition · Computer Science 2022-07-27 Lukas Hoyer , Dengxin Dai , Luc Van Gool

The effectiveness of unsupervised domain adaptation degrades when there is a large discrepancy between the source and target domains. Gradual domain adaptation (GDA) is one promising way to mitigate such an issue, by leveraging additional…

Computer Vision and Pattern Recognition · Computer Science 2022-07-12 Hong-You Chen , Wei-Lun Chao

LiDAR-based 3D detection has made great progress in recent years. However, the performance of 3D detectors is considerably limited when deployed in unseen environments, owing to the severe domain gap problem. Existing domain adaptive 3D…

Computer Vision and Pattern Recognition · Computer Science 2023-08-17 Ziyu Li , Jingming Guo , Tongtong Cao , Liu Bingbing , Wankou Yang

Breakthroughs in unsupervised domain adaptation (uDA) can help in adapting models from a label-rich source domain to unlabeled target domains. Despite these advancements, there is a lack of research on how uDA algorithms, particularly those…

Machine Learning · Computer Science 2021-12-28 Shaoduo Gan , Akhil Mathur , Anton Isopoussu , Fahim Kawsar , Nadia Berthouze , Nicholas Lane

Source-free Unsupervised Domain Adaptation (SFDA) aims to classify target samples by only accessing a pre-trained source model and unlabelled target samples. Since no source data is available, transferring the knowledge from the source…

Computer Vision and Pattern Recognition · Computer Science 2024-05-14 Jinkun Jiang , Qingxuan Lv , Yuezun Li , Yong Du , Sheng Chen , Hui Yu , Junyu Dong

Semantic segmentation suffers from significant performance degradation when the trained network is applied to a different domain. To address this issue, unsupervised domain adaptation (UDA) has been extensively studied. Despite the…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Wangkai Li , Rui Sun , Huayu Mai , Tianzhu Zhang

Unsupervised domain adaptation (UDA) has increasingly gained interests for its capacity to transfer the knowledge learned from a labeled source domain to an unlabeled target domain. However, typical UDA methods require concurrent access to…

Computer Vision and Pattern Recognition · Computer Science 2023-07-20 Qinji Yu , Nan Xi , Junsong Yuan , Ziyu Zhou , Kang Dang , Xiaowei Ding

In the presence of large sets of labeled data, Deep Learning (DL) has accomplished extraordinary triumphs in the avenue of computer vision, particularly in object classification and recognition tasks. However, DL cannot always perform well…

Computer Vision and Pattern Recognition · Computer Science 2019-01-03 Mohammad Mahfujur Rahman , Clinton Fookes , Mahsa Baktashmotlagh , Sridha Sridharan

Unsupervised domain adaptation (UDA) provides a strategy for improving machine learning performance in data-rich (target) domains where ground truth labels are inaccessible but can be found in related (source) domains. In cases where…

Machine Learning · Computer Science 2023-07-24 Garrett Wilson , Janardhan Rao Doppa , Diane J. Cook

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

Unsupervised domain adaptation (UDA) aims at exploiting related but different data sources to tackle a common task in a target domain. UDA remains a central yet challenging problem in machine learning. In this paper, we present an approach…

Machine Learning · Computer Science 2021-10-07 Aladin Virmaux , Illyyne Saffar , Jianfeng Zhang , Balázs Kégl

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

Unsupervised domain adaptation (UDA) involves a supervised loss in a labeled source domain and an unsupervised loss in an unlabeled target domain, which often faces more severe overfitting (than classical supervised learning) as the…

Computer Vision and Pattern Recognition · Computer Science 2021-08-17 Jiaxing Huang , Dayan Guan , Aoran Xiao , Shijian Lu

Recent advancements in deep learning-based wearable human action recognition (wHAR) have improved the capture and classification of complex motions, but adoption remains limited due to the lack of expert annotations and domain discrepancies…

Computer Vision and Pattern Recognition · Computer Science 2024-10-24 Indrajeet Ghosh , Garvit Chugh , Abu Zaher Md Faridee , Nirmalya Roy

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 2023-09-04 Shiqi Yang , Yaxing Wang , Joost van de Weijer , Luis Herranz , Shangling Jui , Jian Yang

By using unsupervised domain adaptation (UDA), knowledge can be transferred from a label-rich source domain to a target domain that contains relevant information but lacks labels. Many existing UDA algorithms suffer from directly using raw…

Computer Vision and Pattern Recognition · Computer Science 2024-03-22 Le Luo , Bingrong Xu , Qingyong Zhang , Cheng Lian , Jie Luo

In this paper, we propose a reduced reference (RR) point cloud quality assessment (PCQA) model named R-PCQA to quantify the distortions introduced by the lossy compression. Specifically, we use the attribute and geometry quantization steps…

Image and Video Processing · Electrical Eng. & Systems 2023-01-04 Yipeng Liu , Qi Yang , Yiling Xu

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) aims to improve the prediction performance in the target domain under distribution shifts from the source domain. The key principle of UDA is to minimize the divergence between the source and the target…

Computer Vision and Pattern Recognition · Computer Science 2022-11-17 JoonHo Lee , Gyemin Lee