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Continual learning (CL) over non-stationary data streams remains one of the long-standing challenges in deep neural networks (DNNs) as they are prone to catastrophic forgetting. CL models can benefit from self-supervised pre-training as it…

Machine Learning · Computer Science 2022-07-14 Prashant Bhat , Bahram Zonooz , Elahe Arani

Self-supervised methods have shown remarkable progress in learning high-level semantics and low-level temporal correspondence. Building on these results, we take one step further and explore the possibility of integrating these two features…

Computer Vision and Pattern Recognition · Computer Science 2024-03-22 Rui Qian , Shuangrui Ding , Xian Liu , Dahua Lin

Learning time-series representations when only unlabeled data or few labeled samples are available can be a challenging task. Recently, contrastive self-supervised learning has shown great improvement in extracting useful representations…

Machine Learning · Computer Science 2023-09-06 Emadeldeen Eldele , Mohamed Ragab , Zhenghua Chen , Min Wu , Chee-Keong Kwoh , Xiaoli Li , Cuntai Guan

Real-world data often exhibits long tail distributions with heavy class imbalance, where the majority classes can dominate the training process and alter the decision boundaries of the minority classes. Recently, researchers have…

Computer Vision and Pattern Recognition · Computer Science 2022-05-03 Tianhong Li , Peng Cao , Yuan Yuan , Lijie Fan , Yuzhe Yang , Rogerio Feris , Piotr Indyk , Dina Katabi

In this paper, we present an approach for learning a visual representation from the raw spatiotemporal signals in videos. Our representation is learned without supervision from semantic labels. We formulate our method as an unsupervised…

Computer Vision and Pattern Recognition · Computer Science 2016-07-27 Ishan Misra , C. Lawrence Zitnick , Martial Hebert

We introduce Consistent Assignment for Representation Learning (CARL), an unsupervised learning method to learn visual representations by combining ideas from self-supervised contrastive learning and deep clustering. By viewing contrastive…

Machine Learning · Computer Science 2023-10-23 Thalles Silva , Adín Ramírez Rivera

Applying image processing algorithms independently to each frame of a video often leads to undesired inconsistent results over time. Developing temporally consistent video-based extensions, however, requires domain knowledge for individual…

Computer Vision and Pattern Recognition · Computer Science 2018-08-02 Wei-Sheng Lai , Jia-Bin Huang , Oliver Wang , Eli Shechtman , Ersin Yumer , Ming-Hsuan Yang

Tracing a student's knowledge growth given the past exercise answering is a vital objective in automatic tutoring systems to customize the learning experience. Yet, achieving this objective is a non-trivial task as it involves modeling the…

Computers and Society · Computer Science 2024-10-04 Seif Gad , Sherif Abdelfattah , Ghodai Abdelrahman

The early detection of potential failures in industrial machinery components is paramount for ensuring the reliability and safety of operations, thereby preserving Machine Condition Monitoring (MCM). This research addresses this imperative…

Sound · Computer Science 2024-10-28 Sahan Dissanayaka , Manjusri Wickramasinghe , Pasindu Marasinghe

Time Series Classification (TSC) has been an important and challenging task in data mining, especially on multivariate time series and multi-view time series data sets. Meanwhile, transfer learning has been widely applied in computer vision…

Machine Learning · Computer Science 2019-10-18 Donglin Zhan , Shiyu Yi , Dongli Xu , Xiao Yu , Denglin Jiang , Siqi Yu , Haoting Zhang , Wenfang Shangguan , Weihua Zhang

Deep reinforcement learning (RL) agents that exist in high-dimensional state spaces, such as those composed of images, have interconnected learning burdens. Agents must learn an action-selection policy that completes their given task, which…

Machine Learning · Computer Science 2021-10-12 Trevor McInroe , Lukas Schäfer , Stefano V. Albrecht

Time series anomaly detection (TSAD) plays a vital role in many industrial applications. While contrastive learning has gained momentum in the time series domain for its prowess in extracting meaningful representations from unlabeled data,…

Machine Learning · Computer Science 2025-01-28 Katrina Chen , Mingbin Feng , Tony S. Wirjanto

Cross-modal retrieval maps data under different modality via semantic relevance. Existing approaches implicitly assume that data pairs are well-aligned and ignore the widely existing annotation noise, i.e., noisy correspondence (NC).…

Computer Vision and Pattern Recognition · Computer Science 2025-06-12 Shuai Lyu , Zijing Tian , Zhonghong Ou , Yifan Zhu , Xiao Zhang , Qiankun Ha , Haoran Luo , Meina Song

While self-supervised learning techniques are often used to mining implicit knowledge from unlabeled data via modeling multiple views, it is unclear how to perform effective representation learning in a complex and inconsistent context. To…

Computer Vision and Pattern Recognition · Computer Science 2023-08-10 Jiangmeng Li , Wenwen Qiang , Changwen Zheng , Bing Su , Farid Razzak , Ji-Rong Wen , Hui Xiong

As an exemplary self-supervised approach for representation learning, time-series contrastive learning has exhibited remarkable advancements in contemporary research. While recent contrastive learning strategies have focused on how to…

Machine Learning · Computer Science 2024-08-27 Xiyuan Jin , Jing Wang , Lei Liu , Youfang Lin

Temporal Reasoning is one important functionality for vision intelligence. In computer vision research community, temporal reasoning is usually studied in the form of video classification, for which many state-of-the-art Neural Network…

Computer Vision and Pattern Recognition · Computer Science 2022-03-14 Shiwen Zhang

Offline meta-reinforcement learning seeks to learn policies that generalize across related tasks from fixed datasets. Context-based methods infer a task representation from transition histories, but learning effective task representations…

Machine Learning · Computer Science 2026-03-04 Mohammadreza Nakheai , Aidan Scannell , Kevin Luck , Joni Pajarinen

In many scenarios of Person Re-identification (Re-ID), the gallery set consists of lots of surveillance videos and the query is just an image, thus Re-ID has to be conducted between image and videos. Compared with videos, still person…

Computer Vision and Pattern Recognition · Computer Science 2019-10-11 Xinqian Gu , Bingpeng Ma , Hong Chang , Shiguang Shan , Xilin Chen

Video self-supervised learning is a challenging task, which requires significant expressive power from the model to leverage rich spatial-temporal knowledge and generate effective supervisory signals from large amounts of unlabeled videos.…

Computer Vision and Pattern Recognition · Computer Science 2023-07-19 Yang Liu , Keze Wang , Lingbo Liu , Haoyuan Lan , Liang Lin

We introduce a novel self-supervised contrastive learning method to learn representations from unlabelled videos. Existing approaches ignore the specifics of input distortions, e.g., by learning invariance to temporal transformations.…

Computer Vision and Pattern Recognition · Computer Science 2021-12-08 Simon Jenni , Hailin Jin