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Vision-based surgical skill assessment (SSA) enables objective and scalable evaluation of operative performance. Progress in this field is constrained by the high cost and time demands for manual annotation of quantitative skill scores, as…

Computer Vision and Pattern Recognition · Computer Science 2026-04-01 Dimitrios Anastasiou , Razvan Caramalau , Jialang Xu , Runlong He , Freweini Tesfai , Matthew Boal , Nader Francis , Danail Stoyanov , Evangelos B. Mazomenos

While Unsupervised Domain Adaptation (UDA) algorithms, i.e., there are only labeled data from source domains, have been actively studied in recent years, most algorithms and theoretical results focus on Single-source Unsupervised Domain…

Machine Learning · Computer Science 2022-01-05 Yongchun Zhu , Fuzhen Zhuang , Deqing Wang

Learning invariant representations via contrastive learning has seen state-of-the-art performance in domain generalization (DG). Despite such success, in this paper, we find that its core learning strategy -- feature alignment -- could…

Computer Vision and Pattern Recognition · Computer Science 2023-10-17 Yibing Liu , Chris Xing Tian , Haoliang Li , Shiqi Wang

Existing unsupervised domain adaptation methods based on adversarial learning have achieved good performance in several medical imaging tasks. However, these methods focus only on global distribution adaptation and ignore distribution…

Computer Vision and Pattern Recognition · Computer Science 2022-07-11 Wei Feng , Lin Wang , Lie Ju , Xin Zhao , Xin Wang , Xiaoyu Shi , Zongyuan Ge

Recent progress in contrastive learning has revolutionized unsupervised representation learning. Concretely, multiple views (augmentations) from the same image are encouraged to map to the similar embeddings, while views from different…

Computer Vision and Pattern Recognition · Computer Science 2021-01-20 Nanxuan Zhao , Zhirong Wu , Rynson W. H. Lau , Stephen Lin

Semi-supervised domain adaptation (SSDA) adapts a learner to a new domain by effectively utilizing source domain data and a few labeled target samples. It is a practical yet under-investigated research topic. In this paper, we analyze the…

Computer Vision and Pattern Recognition · Computer Science 2023-03-31 Wenqiao Zhang , Changshuo Liu , Can Cui , Beng Chin Ooi

We address the problem of unsupervised domain adaptation (UDA) by learning a cross-domain agnostic embedding space, where the distance between the probability distributions of the two source and target visual domains is minimized. We use…

Machine Learning · Computer Science 2019-09-25 Alex Gabourie , Mohammad Rostami , Philip Pope , Soheil Kolouri , Kyungnam Kim

Unsupervised person re-identification (ReID) aims at learning discriminative identity features without annotations. Recently, self-supervised contrastive learning has gained increasing attention for its effectiveness in unsupervised…

Computer Vision and Pattern Recognition · Computer Science 2021-08-19 Hao Chen , Benoit Lagadec , Francois Bremond

Unsupervised Domain Adaptation (UDA) for object detection aims to adapt a model trained on a source domain to detect instances from a new target domain for which annotations are not available. Different from traditional approaches, we…

Computer Vision and Pattern Recognition · Computer Science 2022-10-24 Giulio Mattolin , Luca Zanella , Elisa Ricci , Yiming Wang

Contrastive learning (CL) has achieved astonishing progress in computer vision, speech, and natural language processing fields recently with self-supervised learning. However, CL approach to the supervised setting is not fully explored,…

Computation and Language · Computer Science 2022-05-23 Zhenyu Zhang , Yuming Zhao , Meng Chen , Xiaodong He

Recent breakthroughs in scale have enabled the emergence of powerful generative language models, and the ability to fine-tune these models on various tasks by casting them into prompts or instructions. In this landscape, the problem of…

Computation and Language · Computer Science 2025-03-04 Rheeya Uppaal , Yixuan Li , Junjie Hu

Although unsupervised domain adaptation methods have achieved remarkable performance in semantic scene segmentation in visual perception for self-driving cars, these approaches remain impractical in real-world use cases. In practice, the…

Computer Vision and Pattern Recognition · Computer Science 2024-04-16 Thanh-Dat Truong , Pierce Helton , Ahmed Moustafa , Jackson David Cothren , Khoa Luu

The objective of unsupervised domain adaptation is to leverage features from a labeled source domain and learn a classifier for an unlabeled target domain, with a similar but different data distribution. Most deep learning approaches to…

Computer Vision and Pattern Recognition · Computer Science 2018-04-19 Pedro O. Pinheiro

The accuracy of deep learning (e.g., convolutional neural networks) for an image classification task critically relies on the amount of labeled training data. Aiming to solve an image classification task on a new domain that lacks labeled…

Computer Vision and Pattern Recognition · Computer Science 2019-01-01 Xianghong Fang , Haoli Bai , Ziyi Guo , Bin Shen , Steven Hoi , Zenglin Xu

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

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

Standard unsupervised domain adaptation methods adapt models from a source to a target domain using labeled source data and unlabeled target data jointly. In model adaptation, on the other hand, access to the labeled source data is…

Computer Vision and Pattern Recognition · Computer Science 2023-08-21 David Bruggemann , Christos Sakaridis , Tim Brödermann , Luc Van Gool

Unsupervised meta-learning aims to learn generalizable knowledge across a distribution of tasks constructed from unlabeled data. Here, the main challenge is how to construct diverse tasks for meta-learning without label information; recent…

Machine Learning · Computer Science 2023-03-03 Huiwon Jang , Hankook Lee , Jinwoo Shin

Standard Unsupervised Domain Adaptation (UDA) aims to transfer knowledge from a labeled source domain to an unlabeled target but usually requires simultaneous access to both source and target data. Moreover, UDA approaches commonly assume…

Computer Vision and Pattern Recognition · Computer Science 2024-04-17 Mattia Litrico , Davide Talon , Sebastiano Battiato , Alessio Del Bue , Mario Valerio Giuffrida , Pietro Morerio

We consider unsupervised domain adaptation (UDA) for classification problems in the presence of missing data in the unlabelled target domain. More precisely, motivated by practical applications, we analyze situations where distribution…

Machine Learning · Computer Science 2021-09-21 Matthieu Kirchmeyer , Patrick Gallinari , Alain Rakotomamonjy , Amin Mantrach