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Labeling semantic segmentation datasets is a costly and laborious process if compared with tasks like image classification and object detection. This is especially true for remote sensing applications that not only work with extremely high…

计算机视觉与模式识别 · 计算机科学 2021-08-27 Matheus Barros Pereira , Jefersson Alex dos Santos

Time Series Forecasting (TSF) is a crucial task in various domains, yet existing TSF models rely heavily on high-quality data and insufficiently exploit all available data. This paper explores a novel self-supervised approach to re-label…

机器学习 · 计算机科学 2025-12-17 Yuxuan Yang , Dalin Zhang , Yuxuan Liang , Hua Lu , Gang Chen , Huan Li

One main challenge in time series anomaly detection (TSAD) is the lack of labelled data in many real-life scenarios. Most of the existing anomaly detection methods focus on learning the normal behaviour of unlabelled time series in an…

机器学习 · 计算机科学 2024-09-04 Zahra Zamanzadeh Darban , Geoffrey I. Webb , Shirui Pan , Charu C. Aggarwal , Mahsa Salehi

Most recent test-time adaptation methods focus on only classification tasks, use specialized network architectures, destroy model calibration or rely on lightweight information from the source domain. To tackle these issues, this paper…

计算机视觉与模式识别 · 计算机科学 2023-03-20 Devavrat Tomar , Guillaume Vray , Behzad Bozorgtabar , Jean-Philippe Thiran

New remote sensing sensors now acquire high spatial and spectral Satellite Image Time Series (SITS) of the world. These series of images are a key component of classification systems that aim at obtaining up-to-date and accurate land cover…

计算机视觉与模式识别 · 计算机科学 2019-02-01 Charlotte Pelletier , Geoffrey I. Webb , Francois Petitjean

Geo-tagged images are publicly available in large quantities, whereas labels such as object classes are rather scarce and expensive to collect. Meanwhile, contrastive learning has achieved tremendous success in various natural image and…

计算机视觉与模式识别 · 计算机科学 2023-05-10 Gengchen Mai , Ni Lao , Yutong He , Jiaming Song , Stefano Ermon

Self-supervised learning (SSL) has recently achieved impressive performance on various time series tasks. The most prominent advantage of SSL is that it reduces the dependence on labeled data. Based on the pre-training and fine-tuning…

Unsupervised/self-supervised representation learning in time series is critical since labeled samples are usually scarce in real-world scenarios. Existing approaches mainly leverage the contrastive learning framework, which automatically…

机器学习 · 计算机科学 2023-07-10 Wenrui Zhang , Ling Yang , Shijia Geng , Shenda Hong

Semantic change detection in remote sensing aims to identify land cover changes between bi-temporal image pairs. Progress in this area has been limited by the scarcity of annotated datasets, as pixel-level annotation is costly and…

计算机视觉与模式识别 · 计算机科学 2026-01-06 Xavier Bou , Elliot Vincent , Gabriele Facciolo , Rafael Grompone von Gioi , Jean-Michel Morel , Thibaud Ehret

Deep convolutional neural networks have considerably improved state-of-the-art results for semantic segmentation. Nevertheless, even modern architectures lack the ability to generalize well to a test dataset that originates from a different…

计算机视觉与模式识别 · 计算机科学 2021-05-06 Robert A. Marsden , Alexander Bartler , Mario Döbler , Bin Yang

Due to the advantages of leveraging unlabeled data and learning meaningful representations, semi-supervised learning and contrastive learning have been progressively combined to achieve better performances in popular applications with few…

计算机视觉与模式识别 · 计算机科学 2023-12-27 Bowen Tao , Lan Li , Xin-Chun Li , De-Chuan Zhan

Self-supervised learning (SSL) for multivariate time series mainly includes two paradigms: contrastive methods that excel at instance discrimination and generative approaches that model data distributions. While effective individually,…

机器学习 · 计算机科学 2025-08-14 Ziyu Liu , Azadeh Alavi , Minyi Li , Xiang Zhang

Unsupervised (a.k.a. Self-supervised) representation learning (URL) has emerged as a new paradigm for time series analysis, because it has the ability to learn generalizable time series representation beneficial for many downstream tasks…

机器学习 · 计算机科学 2024-04-09 Zhiyu Liang , Chen Liang , Zheng Liang , Hongzhi Wang , Bo Zheng

Continuous efforts are being made to advance anomaly detection in various manufacturing processes to increase the productivity and safety of industrial sites. Deep learning replaced rule-based methods and recently emerged as a promising…

机器学习 · 计算机科学 2024-06-28 Kukjin Choi , Jihun Yi , Jisoo Mok , Sungroh Yoon

Recently, contrastive self-supervised learning has become a key component for learning visual representations across many computer vision tasks and benchmarks. However, contrastive learning in the context of domain adaptation remains…

计算机视觉与模式识别 · 计算机科学 2021-06-25 Mamatha Thota , Georgios Leontidis

Time series are ubiquitous and therefore inherently hard to analyze and ultimately to label or cluster. With the rise of the Internet of Things (IoT) and its smart devices, data is collected in large amounts any given second. The collected…

机器学习 · 计算机科学 2022-07-14 Padraig Davidson , Michael Steininger , André Huhn , Anna Krause , Andreas Hotho

Self-supervised pre-training with contrastive learning is a powerful method for learning from sparsely labeled data. However, performance can drop considerably when there is a shift in the distribution of data from training to test time. We…

机器学习 · 计算机科学 2026-01-13 Robert Lewis , Katie Matton , Rosalind W. Picard , John Guttag

Self-supervised pretraining on large-scale satellite data has raised great interest in building Earth observation (EO) foundation models. However, many important resources beyond pure satellite imagery, such as land-cover-land-use products…

计算机视觉与模式识别 · 计算机科学 2024-09-25 Yi Wang , Conrad M Albrecht , Xiao Xiang Zhu

The pursuit of learning robust representations without human supervision is a longstanding challenge. The recent advancements in self-supervised contrastive learning approaches have demonstrated high performance across various…

计算机视觉与模式识别 · 计算机科学 2024-03-29 Ozgu Goksu , Nicolas Pugeault

Test-Time Adaptation (TTA) methods improve the robustness of deep neural networks to domain shift on a variety of tasks such as image classification or segmentation. This work explores adapting segmentation models to a single unlabelled…

计算机视觉与模式识别 · 计算机科学 2024-07-04 Klara Janouskova , Tamir Shor , Chaim Baskin , Jiri Matas