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In many classification problems unlabelled data is abundant and a subset can be chosen for labelling. This defines the context of active learning (AL), where methods systematically select that subset, to improve a classifier by retraining.…

机器学习 · 统计学 2014-07-31 Lewis P. G. Evans , Niall M. Adams , Christoforos Anagnostopoulos

While annotating decent amounts of data to satisfy sophisticated learning models can be cost-prohibitive for many real-world applications. Active learning (AL) and semi-supervised learning (SSL) are two effective, but often isolated, means…

机器学习 · 计算机科学 2022-06-08 Jiannan Guo , Yangyang Kang , Yu Duan , Xiaozhong Liu , Siliang Tang , Wenqiao Zhang , Kun Kuang , Changlong Sun , Fei Wu

Conventional active learning algorithms assume a single labeler that produces noiseless label at a given, fixed cost, and aim to achieve the best generalization performance for given classifier under a budget constraint. However, in many…

机器学习 · 计算机科学 2021-05-25 Ruijiang Gao , Maytal Saar-tsechansky

Active learning (AL) can reduce annotation costs in surgical video analysis while maintaining model performance. However, traditional AL methods, developed for images or short video clips, are suboptimal for surgical step recognition due to…

计算机视觉与模式识别 · 计算机科学 2025-07-30 Nisarg A. Shah , Bardia Safaei , Shameema Sikder , S. Swaroop Vedula , Vishal M. Patel

Localizing actions in video is a core task in computer vision. The weakly supervised temporal localization problem investigates whether this task can be adequately solved with only video-level labels, significantly reducing the amount of…

计算机视觉与模式识别 · 计算机科学 2021-05-07 Junwei Ma , Satya Krishna Gorti , Maksims Volkovs , Guangwei Yu

Reliance on vast annotations to achieve leading performance severely restricts the practicality of large-scale point cloud semantic segmentation. For the purpose of reducing data annotation costs, effective labeling schemes are developed…

计算机视觉与模式识别 · 计算机科学 2022-11-24 Puzuo Wang , Wei Yao , Jie Shao

The promise of active learning (AL) is to reduce labelling costs by selecting the most valuable examples to annotate from a pool of unlabelled data. Identifying these examples is especially challenging with high-dimensional data (e.g.…

计算机视觉与模式识别 · 计算机科学 2022-03-15 Amin Parvaneh , Ehsan Abbasnejad , Damien Teney , Reza Haffari , Anton van den Hengel , Javen Qinfeng Shi

Semantic labelling and instance segmentation are two tasks that require particularly costly annotations. Starting from weak supervision in the form of bounding box detection annotations, we propose a new approach that does not require…

计算机视觉与模式识别 · 计算机科学 2016-11-24 Anna Khoreva , Rodrigo Benenson , Jan Hosang , Matthias Hein , Bernt Schiele

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…

计算机视觉与模式识别 · 计算机科学 2021-04-13 Xian Shi , Xun Xu , Ke Chen , Lile Cai , Chuan Sheng Foo , Kui Jia

We develop the first active learning method for contextual linear optimization. Specifically, we introduce a label acquisition algorithm that sequentially decides whether to request the ``labels'' of feature samples from an unlabeled data…

机器学习 · 计算机科学 2025-01-31 Mo Liu , Paul Grigas , Heyuan Liu , Zuo-Jun Max Shen

Though quite challenging, leveraging large-scale unlabeled or partially labeled data in learning systems (e.g., model/classifier training) has attracted increasing attentions due to its fundamental importance. To address this problem, many…

计算机视觉与模式识别 · 计算机科学 2019-01-15 Keze Wang , Liang Lin , Xiaopeng Yan , Ziliang Chen , Dongyu Zhang , Lei Zhang

Multiple instance learning (MIL) problem is currently solved from either bag-classification or instance-classification perspective, both of which ignore important information contained in some instances and result in limited performance.…

计算机视觉与模式识别 · 计算机科学 2024-08-12 Yingfan Ma , Xiaoyuan Luo , Mingzhi Yuan , Xinrong Chen , Manning Wang

Active Learning (AL) is increasingly important in a broad range of applications. Two main AL principles to obtain accurate classification with few labeled data are refinement of the current decision boundary and exploration of poorly…

机器学习 · 计算机科学 2012-10-19 Jens Roeder , Boaz Nadler , Kevin Kunzmann , Fred A. Hamprecht

While LiDAR data acquisition is easy, labeling for semantic segmentation remains highly time consuming and must therefore be done selectively. Active learning (AL) provides a solution that can iteratively and intelligently label a dataset…

计算机视觉与模式识别 · 计算机科学 2023-09-26 Ozan Unal , Dengxin Dai , Ali Tamer Unal , Luc Van Gool

Novel intent class detection is an important problem in real world scenario for conversational agents for continuous interaction. Several research works have been done to detect novel intents in a mono-lingual (primarily English) texts and…

计算与语言 · 计算机科学 2023-04-24 Ankan Mullick

Training a quantum machine learning model generally requires a large labeled dataset, which incurs high labeling and computational costs. To reduce such costs, a selective training strategy, called active learning (AL), chooses only a…

量子物理 · 物理学 2022-08-04 Chen Ding , Xiao-Yue Xu , Yun-Fei Niu , Shuo Zhang , Wan-Su Bao , He-Liang Huang

Federated active learning (FAL) seeks to reduce annotation cost under privacy constraints, yet its effectiveness degrades in realistic settings with severe global class imbalance and highly heterogeneous clients. We conduct a systematic…

机器学习 · 计算机科学 2026-03-12 Chen-Chen Zong , Sheng-Jun Huang

Pool-based active learning (AL) is a promising technology for increasing data-efficiency of machine learning models. However, surveys show that performance of recent AL methods is very sensitive to the choice of dataset and training…

机器学习 · 计算机科学 2023-09-12 Tim Bakker , Herke van Hoof , Max Welling

Classification algorithms aim to predict an unknown label (e.g., a quality class) for a new instance (e.g., a product). Therefore, training samples (instances and labels) are used to deduct classification hypotheses. Often, it is relatively…

机器学习 · 计算机科学 2019-01-30 Daniel Kottke , Jim Schellinger , Denis Huseljic , Bernhard Sick

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…

机器学习 · 计算机科学 2023-06-21 Lukas Rauch , Matthias Aßenmacher , Denis Huseljic , Moritz Wirth , Bernd Bischl , Bernhard Sick