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We study outlier (a.k.a., anomaly) detection for single-pass non-stationary streaming data. In the well-studied offline or batch outlier detection problem, traditional methods such as kernel One-Class SVM (OCSVM) are both computationally…

Machine Learning · Statistics 2025-12-15 Joe Suk , Samory Kpotufe

In this paper we simulate a real biometric verification system based on on-line signatures. For this purpose we have split the MCYT signature database in three subsets: one for classifier training, another for system adjustment and a third…

Computer Vision and Pattern Recognition · Computer Science 2022-02-25 Joan Fabregas , Marcos Faundez-Zanuy

The goal of this work is to detect and recognize sequences of letters signed using fingerspelling in British Sign Language (BSL). Previous fingerspelling recognition methods have not focused on BSL, which has a very different signing…

Computer Vision and Pattern Recognition · Computer Science 2022-11-17 K R Prajwal , Hannah Bull , Liliane Momeni , Samuel Albanie , Gül Varol , Andrew Zisserman

Semi-supervised learning (SSL) leverages abundant unlabeled data alongside limited labeled data to enhance learning. As vision foundation models (VFMs) increasingly serve as the backbone of vision applications, it remains unclear how SSL…

Machine Learning · Computer Science 2025-11-06 Ping Zhang , Zheda Mai , Quang-Huy Nguyen , Wei-Lun Chao

The lack of a suitable tool for the analysis of conversational texts in the Persian language has made various analyses of these texts, including Sentiment Analysis, difficult. In this research, we tried to make the understanding of these…

Computation and Language · Computer Science 2024-09-05 Mohsen Khazeni , Mohammad Heydari , Amir Albadvi

Open-set semi-supervised learning (OSSL) has attracted growing interest, which investigates a more practical scenario where out-of-distribution (OOD) samples are only contained in unlabeled data. Existing OSSL methods like OpenMatch learn…

Computer Vision and Pattern Recognition · Computer Science 2022-09-29 Haoran Li , Chun-Mei Feng , Tao Zhou , Yong Xu , Xiaojun Chang

While transformer-based systems have enabled greater accuracies with fewer training examples, data acquisition obstacles still persist for rare-class tasks -- when the class label is very infrequent (e.g. < 5% of samples). Active learning…

Computation and Language · Computer Science 2023-05-08 Vasudha Varadarajan , Swanie Juhng , Syeda Mahwish , Xiaoran Liu , Jonah Luby , Christian Luhmann , H. Andrew Schwartz

Active learning for sentence understanding aims at discovering informative unlabeled data for annotation and therefore reducing the demand for labeled data. We argue that the typical uncertainty sampling method for active learning is…

Computation and Language · Computer Science 2020-10-29 Dongyu Ru , Jiangtao Feng , Lin Qiu , Hao Zhou , Mingxuan Wang , Weinan Zhang , Yong Yu , Lei Li

Active learning aims to reduce the high labeling cost involved in training machine learning models on large datasets by efficiently labeling only the most informative samples. Recently, deep active learning has shown success on various…

Computer Vision and Pattern Recognition · Computer Science 2019-12-12 Sudhanshu Mittal , Maxim Tatarchenko , Özgün Çiçek , Thomas Brox

Active learning approaches in computer vision generally involve querying strong labels for data. However, previous works have shown that weak supervision can be effective in training models for vision tasks while greatly reducing annotation…

Computer Vision and Pattern Recognition · Computer Science 2019-10-16 Sai Vikas Desai , Akshay L Chandra , Wei Guo , Seishi Ninomiya , Vineeth N Balasubramanian

Active learning algorithms automatically identify the most informative samples from large amounts of unlabeled data and tremendously reduce human annotation effort in inducing a machine learning model. In a conventional active learning…

Machine Learning · Computer Science 2026-04-28 Varun Totakura , Ankita Singh , Yushun Dong , Shayok Chakraborty

State-of-the-art machine learning models require access to significant amount of annotated data in order to achieve the desired level of performance. While unlabelled data can be largely available and even abundant, annotation process can…

Machine Learning · Computer Science 2020-10-15 Rahaf Aljundi , Nikolay Chumerin , Daniel Olmeda Reino

Change detection is a major task in remote sensing which consists in finding all the occurrences of changes in multi-temporal satellite or aerial images. The success of existing methods, and particularly deep learning ones, is tributary to…

Computer Vision and Pattern Recognition · Computer Science 2025-10-09 Hichem Sahbi

Acquiring ground truth labels for unlabelled data can be a costly procedure, since it often requires manual labour that is error-prone. Consequently, the available amount of labelled data is increasingly reduced due to the limitations of…

Machine Learning · Computer Science 2019-12-24 Athanasios Davvetas , Iraklis A. Klampanos

Temporal Action Localization (TAL) aims to predict both action category and temporal boundary of action instances in untrimmed videos, i.e., start and end time. Fully-supervised solutions are usually adopted in most existing works, and…

Computer Vision and Pattern Recognition · Computer Science 2022-12-02 Ding Li , Xuebing Yang , Yongqiang Tang , Chenyang Zhang , Wensheng Zhang

Nowadays, supervised deep learning techniques yield the best state-of-the-art prediction performances for a wide variety of computer vision tasks. However, such supervised techniques generally require a large amount of manually labeled…

Computer Vision and Pattern Recognition · Computer Science 2020-06-09 Florent Chiaroni , Mohamed-Cherif Rahal , Nicolas Hueber , Frederic Dufaux

3D Referring Expression Segmentation (3D-RES) typically requires extensive instance-level annotations, which are time-consuming and costly. Semi-supervised learning (SSL) mitigates this by using limited labeled data alongside abundant…

Computer Vision and Pattern Recognition · Computer Science 2025-04-18 Wenxin Chen , Mengxue Qu , Weitai Kang , Yan Yan , Yao Zhao , Yunchao Wei

Self-supervised learning has emerged as a powerful approach for leveraging large-scale unlabeled data to improve model performance in various domains. In this paper, we explore masked self-supervised pre-training for text recognition…

Computer Vision and Pattern Recognition · Computer Science 2025-03-31 Martin Kišš , Michal Hradiš

Active learning is a paradigm aimed at reducing the annotation effort by training the model on actively selected informative and/or representative samples. Another paradigm to reduce the annotation effort is self-training that learns from a…

Computer Vision and Pattern Recognition · Computer Science 2021-08-27 Javad Zolfaghari Bengar , Joost van de Weijer , Bartlomiej Twardowski , Bogdan Raducanu

Active learning aims to develop label-efficient algorithms by sampling the most representative queries to be labeled by an oracle. We describe a pool-based semi-supervised active learning algorithm that implicitly learns this sampling…

Machine Learning · Computer Science 2019-10-30 Samarth Sinha , Sayna Ebrahimi , Trevor Darrell
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