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We study acquisition functions for active learning (AL) for text classification. The Expected Loss Reduction (ELR) method focuses on a Bayesian estimate of the reduction in classification error, recently updated with Mean Objective Cost of…

Machine Learning · Computer Science 2021-10-28 Wei Tan , Lan Du , Wray Buntine

In image classification tasks, the ability of deep CNNs to deal with complex image data has proven to be unrivalled. However, they require large amounts of labeled training data to reach their full potential. In specialised domains such as…

Machine Learning · Computer Science 2018-11-12 Remus Pop , Patric Fulop

Deep metric learning (DML) based methods have been found very effective for content-based image retrieval (CBIR) in remote sensing (RS). For accurately learning the model parameters of deep neural networks, most of the DML methods require a…

Computer Vision and Pattern Recognition · Computer Science 2023-06-27 Julia Henkel , Genc Hoxha , Gencer Sumbul , Lars Möllenbrok , Begüm Demir

Active learning is a machine learning method aiming at optimal design for model training. At variance with supervised learning, which labels all samples, active learning provides an improved model by labeling samples with maximal…

Deep Learning (DL) requires lots of time and data, resulting in high computational demands. Recently, researchers employ Active Learning (AL) and online distillation to enhance training efficiency and real-time model adaptation. This paper…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Michele Boldo , Enrico Martini , Mirco De Marchi , Stefano Aldegheri , Nicola Bombieri

The ability to train complex and highly effective models often requires an abundance of training data, which can easily become a bottleneck in cost, time, and computational resources. Batch active learning, which adaptively issues batched…

Machine learning models are increasingly being utilized across various fields and tasks due to their outstanding performance and strong generalization capabilities. Nonetheless, their success hinges on the availability of large volumes of…

Machine Learning · Computer Science 2024-11-26 Shreen Gul , Mohamed Elmahallawy , Sanjay Madria , Ardhendu Tripathy

In this work, we provide a survey of active learning (AL) for its applications in natural language processing (NLP). In addition to a fine-grained categorization of query strategies, we also investigate several other important aspects of…

Computation and Language · Computer Science 2023-02-06 Zhisong Zhang , Emma Strubell , Eduard Hovy

Active learning improves annotation efficiency by selecting the most informative samples for annotation and model training. While most prior work has focused on selecting informative images for classification tasks, we investigate the more…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Jingna Qiu , Frauke Wilm , Mathias Öttl , Jonas Utz , Maja Schlereth , Moritz Schillinger , Marc Aubreville , Katharina Breininger

Supervised learning relies on data annotation which usually is time-consuming and therefore expensive. A longstanding strategy to reduce annotation costs is active learning, an iterative process, in which a human annotates only data…

Computation and Language · Computer Science 2026-02-03 Julia Romberg , Christopher Schröder , Julius Gonsior , Katrin Tomanek , Fredrik Olsson

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…

Machine Learning · Computer Science 2012-10-19 Jens Roeder , Boaz Nadler , Kevin Kunzmann , Fred A. Hamprecht

Active learning selects the most informative samples to exploit limited annotation budgets. Existing work follows a cumbersome pipeline that repeats the time-consuming model training and batch data selection multiple times. In this paper,…

Computer Vision and Pattern Recognition · Computer Science 2022-03-22 Yichen Xie , Masayoshi Tomizuka , Wei Zhan

Active Learning (AL) and Semi-supervised Learning are two techniques that have been studied to reduce the high cost of deep learning by using a small amount of labeled data and a large amount of unlabeled data. To improve the accuracy of…

Computer Vision and Pattern Recognition · Computer Science 2023-03-17 Jaeseung Lim , Jongkeun Na , Nojun Kwak

Active learning (AL) is an effective approach to select the most informative samples to label so as to reduce the annotation cost. Existing AL methods typically work under the closed-set assumption, i.e., all classes existing in the…

Computer Vision and Pattern Recognition · Computer Science 2023-07-12 Linhao Qu , Yingfan Ma , Zhiwei Yang , Manning Wang , Zhijian Song

Even though Active Learning (AL) is widely studied, it is rarely applied in contexts outside its own scientific literature. We posit that the reason for this is AL's high computational cost coupled with the comparatively small lifts it is…

Machine Learning · Computer Science 2025-08-04 Thorben Werner , Lars Schmidt-Thieme , Vijaya Krishna Yalavarthi

The vast amounts of audio data collected in Sound Event Detection (SED) applications require efficient annotation strategies to enable supervised learning. Manual labeling is expensive and time-consuming, making Active Learning (AL) a…

Sound · Computer Science 2025-03-05 Richard Lindholm , Oscar Marklund , Olof Mogren , John Martinsson

Prioritized Experience Replay (PER) is a technical means of deep reinforcement learning by selecting experience samples with more knowledge quantity to improve the training rate of neural network. However, the non-uniform sampling used in…

Machine Learning · Computer Science 2023-10-10 Zhuoying Chen , Huiping Li , Rizhong Wang

One of the major challenges in training deep architectures for predictive tasks is the scarcity and cost of labeled training data. Active Learning (AL) is one way of addressing this challenge. In stream-based AL, observations are…

Machine Learning · Computer Science 2019-09-05 Andreas Kvistad , Massimiliano Ruocco , Eliezer de Souza da Silva , Erlend Aune

Active Learning (AL) addresses the high costs of collecting human annotations by strategically annotating the most informative samples. However, for subjective NLP tasks, incorporating a wide range of perspectives in the annotation process…

Computation and Language · Computer Science 2024-10-24 Michiel van der Meer , Neele Falk , Pradeep K. Murukannaiah , Enrico Liscio

Event extraction (EE), which acquires structural event knowledge from texts, can be divided into two sub-tasks: event type classification and element extraction (namely identifying triggers and arguments under different role patterns). As…

Computation and Language · Computer Science 2022-08-19 Qian Li , Shu Guo , Jia Wu , Jianxin Li , Jiawei Sheng , Lihong Wang , Xiaohan Dong , Hao Peng