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Deep learning models are the state-of-the-art methods for semantic point cloud segmentation, the success of which relies on the availability of large-scale annotated datasets. However, it can be extremely time-consuming and prohibitively…

Computer Vision and Pattern Recognition · Computer Science 2021-04-13 Xian Shi , Xun Xu , Ke Chen , Lile Cai , Chuan Sheng Foo , Kui Jia

Active learning (AL) is a subfield of machine learning (ML) in which a learning algorithm could achieve good accuracy with less training samples by interactively querying a user/oracle to label new data points. Pool-based AL is…

Machine Learning · Computer Science 2020-10-19 Xueying Zhan , Antoni Bert Chan

Active learning (AL) has the potential to drastically reduce annotation costs in 3D biomedical image segmentation, where expert labeling of volumetric data is both time-consuming and expensive. Yet, existing AL methods are unable to…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Carsten T. Lüth , Jeremias Traub , Kim-Celine Kahl , Till J. Bungert , Lukas Klein , Lars Krämer , Paul F. Jäger , Klaus Maier-Hein , Fabian Isensee

Data collection and annotation is a laborious, time-consuming prerequisite for supervised machine learning tasks. Online Active Learning (OAL) is a paradigm that addresses this issue by simultaneously minimizing the amount of annotation…

Audio and Speech Processing · Electrical Eng. & Systems 2023-09-29 Mark Lindsey , Ankit Shah , Francis Kubala , Richard M. Stern

The Deep Learning revolution has enabled groundbreaking achievements in recent years. From breast cancer detection to protein folding, deep learning algorithms have been at the core of very important advancements. However, these modern…

Computer Vision and Pattern Recognition · Computer Science 2024-03-01 Bonaventure F. P. Dossou

Active learning reduces annotation costs in medical imaging by strategically selecting the most informative samples for labeling. However, individual acquisition strategies often exhibit inconsistent behavior across different stages of the…

Computer Vision and Pattern Recognition · Computer Science 2025-11-20 Nishchala Thakur , Swati Kochhar , Deepti R. Bathula , Sukrit Gupta

Active learning (AL) combines data labeling and model training to minimize the labeling cost by prioritizing the selection of high value data that can best improve model performance. In pool-based active learning, accessible unlabeled data…

Machine Learning · Computer Science 2020-07-21 Mingfei Gao , Zizhao Zhang , Guo Yu , Sercan O. Arik , Larry S. Davis , Tomas Pfister

This paper proposes an active learning (AL) algorithm to solve regression problems based on inverse-distance weighting functions for selecting the feature vectors to query. The algorithm has the following features: (i) supports both…

Machine Learning · Computer Science 2022-12-15 Alberto Bemporad

Deep active learning (DAL) seeks to reduce annotation costs by enabling the model to actively query instance annotations from which it expects to learn the most. Despite extensive research, there is currently no standardized evaluation…

Machine Learning · Computer Science 2023-06-21 Lukas Rauch , Matthias Aßenmacher , Denis Huseljic , Moritz Wirth , Bernd Bischl , Bernhard Sick

In this study, we benchmark query strategies for deep actice learning~(DAL). DAL reduces annotation costs by annotating only high-quality samples selected by query strategies. Existing research has two main problems, that the experimental…

Computer Vision and Pattern Recognition · Computer Science 2023-12-12 Shiryu Ueno , Yusei Yamada , Shunsuke Nakatsuka , Kunihito Kato

Machine learning models excel with abundant annotated data, but annotation is often costly and time-intensive. Active learning (AL) aims to improve the performance-to-annotation ratio by using query methods (QMs) to iteratively select the…

Machine Learning · Computer Science 2026-02-17 Hannes Kath , Thiago S. Gouvêa , Daniel Sonntag

In many real-world machine learning applications, unlabeled samples are easy to obtain, but it is expensive and/or time-consuming to label them. Active learning is a common approach for reducing this data labeling effort. It optimally…

Machine Learning · Computer Science 2022-11-15 Ziang Liu , Dongrui Wu

In supervised learning, acquiring labeled training data for a predictive model can be very costly, but acquiring a large amount of unlabeled data is often quite easy. Active learning is a method of obtaining predictive models with high…

Machine Learning · Computer Science 2020-12-17 Hideitsu Hino

Re-training a deep learning model each time a single data point receives a new label is impractical due to the inherent complexity of the training process. Consequently, existing active learning (AL) algorithms tend to adopt a batch-based…

Machine Learning · Computer Science 2023-12-19 Yunpyo An , Suyeong Park , Kwang In Kim

Active Learning (AL) represents a crucial methodology within machine learning, emphasizing the identification and utilization of the most informative samples for efficient model training. However, a significant challenge of AL is its…

Computer Vision and Pattern Recognition · Computer Science 2024-12-24 Hanbin Hong , Shenao Yan , Shuya Feng , Yan Yan , Yuan Hong

The rapid advancements in foundation models and sixth-generation (6G) wireless communication systems necessitate the development of efficient, scalable, and privacy-preserving machine learning approaches. For foundation models in 6G, split…

Information Theory · Computer Science 2026-05-05 Qianzhou Chen , Siqi Sun , Minrui Xu , Sijie Ji , Jiawen Kang , Yijie Mao , Zhouxiang Zhao , Zhaohui Yang , Dusit Niyato

Semantic segmentation requires pixel-level annotation, which is time-consuming. Active Learning (AL) is a promising method for reducing data annotation costs. Due to the gap between aerial and natural images, the previous AL methods are not…

Computer Vision and Pattern Recognition · Computer Science 2024-05-29 Lianlei Shan , Weiqiang Wang , Ke Lv , Bin Luo

Active Learning (AL) is a powerful tool for learning with less labeled data, in particular, for specialized domains, like legal documents, where unlabeled data is abundant, but the annotation requires domain expertise and is thus expensive.…

Computation and Language · Computer Science 2022-11-16 Sepideh Mamooler , Rémi Lebret , Stéphane Massonnet , Karl Aberer

The advent of large language models (LLMs) capable of producing general-purpose representations lets us revisit the practicality of deep active learning (AL): By leveraging frozen LLM embeddings, we can mitigate the computational costs of…

Computation and Language · Computer Science 2025-06-04 Lukas Rauch , Moritz Wirth , Denis Huseljic , Marek Herde , Bernhard Sick , Matthias Aßenmacher

Federated Active Learning (FAL) has emerged as a promising framework to leverage large quantities of unlabeled data across distributed clients while preserving data privacy. However, real-world deployments remain limited by high annotation…

Machine Learning · Computer Science 2025-05-20 Haoyuan Li , Mathias Funk , Jindong Wang , Aaqib Saeed