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We present ReCo, a contrastive learning framework designed at a regional level to assist learning in semantic segmentation. ReCo performs semi-supervised or supervised pixel-level contrastive learning on a sparse set of hard negative…

Computer Vision and Pattern Recognition · Computer Science 2022-02-01 Shikun Liu , Shuaifeng Zhi , Edward Johns , Andrew J. Davison

Unsupervised Domain Adaptation (UDA) aims to adapt a model trained on a labeled source domain to an unlabeled target domain by addressing the domain shift. Existing Unsupervised Domain Adaptation (UDA) methods often fall short in fully…

Computer Vision and Pattern Recognition · Computer Science 2024-10-11 Junzhou Chen , Xuan Wen , Ronghui Zhang , Bingtao Ren , Di Wu , Zhigang Xu , Danwei Wang

Currently, the divergence in distributions of design and operational data, and large computational complexity are limiting factors in the adoption of CNNs in real-world applications. For instance, person re-identification systems typically…

Machine Learning · Computer Science 2020-05-19 Le Thanh Nguyen-Meidine , Eric Granger , Madhu Kiran , Jose Dolz , Louis-Antoine Blais-Morin

Detecting Out-of-Domain (OOD) or unknown intents from user queries is essential in a task-oriented dialog system. A key challenge of OOD detection is to learn discriminative semantic features. Traditional cross-entropy loss only focuses on…

Computation and Language · Computer Science 2021-06-01 Zhiyuan Zeng , Keqing He , Yuanmeng Yan , Zijun Liu , Yanan Wu , Hong Xu , Huixing Jiang , Weiran Xu

Recently, cross domain transfer has been applied for unsupervised image restoration tasks. However, directly applying existing frameworks would lead to domain-shift problems in translated images due to lack of effective supervision.…

Computer Vision and Pattern Recognition · Computer Science 2020-03-31 Wenchao Du , Hu Chen , Hongyu Yang

Face Presentation Attack Detection (PAD) has drawn increasing attentions to secure the face recognition systems that are widely used in many applications. Conventional face anti-spoofing methods have been proposed, assuming that testing is…

Computer Vision and Pattern Recognition · Computer Science 2021-02-16 Yomna Safaa El-Din , Mohamed N. Moustafa , Hani Mahdi

Image-level contrastive representation learning has proven to be highly effective as a generic model for transfer learning. Such generality for transfer learning, however, sacrifices specificity if we are interested in a certain downstream…

Computer Vision and Pattern Recognition · Computer Science 2021-10-26 Fangyun Wei , Yue Gao , Zhirong Wu , Han Hu , Stephen Lin

Contrastive learning relies on constructing a collection of negative examples that are sufficiently hard to discriminate against positive queries when their representations are self-trained. Existing contrastive learning methods either…

Machine Learning · Computer Science 2021-03-08 Qianjiang Hu , Xiao Wang , Wei Hu , Guo-Jun Qi

Existing 3D object detection suffers from expensive annotation costs and poor transferability to unknown data due to the domain gap, Unsupervised Domain Adaptation (UDA) aims to generalize detection models trained in labeled source domains…

Computer Vision and Pattern Recognition · Computer Science 2024-06-28 Yanan Zhang , Chao Zhou , Di Huang

Cross-domain retrieval (CDR), as a crucial tool for numerous technologies, is finding increasingly broad applications. However, existing efforts face several major issues, with the most critical being the need for accurate supervision,…

Computer Vision and Pattern Recognition · Computer Science 2024-03-12 Lixu Wang , Xinyu Du , Qi Zhu

Concept Bottleneck Models (CBMs) enhance interpretability by explaining predictions through human-understandable concepts but typically assume that training and test data share the same distribution. This assumption often fails under domain…

Machine Learning · Computer Science 2025-05-09 Xinyue Xu , Yueying Hu , Hui Tang , Yi Qin , Lu Mi , Hao Wang , Xiaomeng Li

This paper presents an unsupervised domain adaptation (UDA) method for predicting unlabeled target domain data, specific to complex UDA tasks where the domain gap is significant. Mainstream UDA models aim to learn from both domains and…

Computer Vision and Pattern Recognition · Computer Science 2023-05-09 Jun Kataoka , Hyunsoo Yoon

Unsupervised domain adaptation (UDA) is a statistical learning problem when the distribution of training (source) data is different from that of test (target) data. In this setting, one has access to labeled data only from the source domain…

Machine Learning · Computer Science 2026-02-24 Seonghwi Kim , Sung Ho Jo , Wooseok Ha , Minwoo Chae

Extensive studies on Unsupervised Domain Adaptation (UDA) have propelled the deployment of deep learning from limited experimental datasets into real-world unconstrained domains. Most UDA approaches align features within a common embedding…

Computer Vision and Pattern Recognition · Computer Science 2022-08-03 Wenxuan Ma , Jinming Zhang , Shuang Li , Chi Harold Liu , Yulin Wang , Wei Li

The aim of this paper is to give an overview of the recent advancements in the Unsupervised Domain Adaptation (UDA) of deep networks for semantic segmentation. This task is attracting a wide interest, since semantic segmentation models…

Computer Vision and Pattern Recognition · Computer Science 2020-05-25 Marco Toldo , Andrea Maracani , Umberto Michieli , Pietro Zanuttigh

Contrastive representation learning has been recently proved to be very efficient for self-supervised training. These methods have been successfully used to train encoders which perform comparably to supervised training on downstream…

Machine Learning · Computer Science 2020-12-03 Ibrahim Merad , Yiyang Yu , Emmanuel Bacry , Stéphane Gaïffas

Unsupervised Domain Adaptation (UDA) refers to the problem of learning a model in a target domain where labeled data are not available by leveraging information from annotated data in a source domain. Most deep UDA approaches operate in a…

Computer Vision and Pattern Recognition · Computer Science 2021-03-26 Massimiliano Mancini , Lorenzo Porzi , Samuel Rota Bulò , Barbara Caputo , Elisa Ricci

Unsupervised domain adaptation (UDA) for semantic segmentation addresses the cross-domain problem with fine source domain labels. However, the acquisition of semantic labels has always been a difficult step, many scenarios only have weak…

Computer Vision and Pattern Recognition · Computer Science 2022-10-06 Shengjie Liu , Chuang Zhu , Wenqi Tang

In order to handle the challenges of autonomous driving, deep learning has proven to be crucial in tackling increasingly complex tasks, such as 3D detection or instance segmentation. State-of-the-art approaches for image-based detection…

Computer Vision and Pattern Recognition · Computer Science 2021-07-12 Niklas Hanselmann , Nick Schneider , Benedikt Ortelt , Andreas Geiger

Deep learning models trained on medical images from a source domain (e.g. imaging modality) often fail when deployed on images from a different target domain, despite imaging common anatomical structures. Deep unsupervised domain adaptation…

Image and Video Processing · Electrical Eng. & Systems 2019-08-14 Cheng Ouyang , Konstantinos Kamnitsas , Carlo Biffi , Jinming Duan , Daniel Rueckert