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We consider an active learning setting where the algorithm has access to a large pool of unlabeled data and a small pool of labeled data. In each iteration, the algorithm chooses few unlabeled data points and obtains their labels from an…

Machine Learning · Computer Science 2019-10-11 Muni Sreenivas Pydi , Vishnu Suresh Lokhande

Deep learning approaches achieve state-of-the-art performance for classifying radiology images, but rely on large labelled datasets that require resource-intensive annotation by specialists. Both semi-supervised learning and active learning…

Computer Vision and Pattern Recognition · Computer Science 2022-09-07 Shafa Balaram , Cuong M. Nguyen , Ashraf Kassim , Pavitra Krishnaswamy

Central to active learning (AL) is what data should be selected for annotation. Existing works attempt to select highly uncertain or informative data for annotation. Nevertheless, it remains unclear how selected data impacts the test…

Machine Learning · Computer Science 2022-01-25 Tianyang Wang , Xingjian Li , Pengkun Yang , Guosheng Hu , Xiangrui Zeng , Siyu Huang , Cheng-Zhong Xu , Min Xu

Medical image analysis requires substantial labeled data for model training, yet expert annotation is expensive and time-consuming. Active learning (AL) addresses this challenge by strategically selecting the most informative samples for…

Image and Video Processing · Electrical Eng. & Systems 2026-03-06 Ifrat Ikhtear Uddin , Longwei Wang , Xiao Qin , Yang Zhou , KC Santosh

In machine learning, active class selection (ACS) algorithms aim to actively select a class and ask the oracle to provide an instance for that class to optimize a classifier's performance while minimizing the number of requests. In this…

Training high-quality instance segmentation models requires an abundance of labeled images with instance masks and classifications, which is often expensive to procure. Active learning addresses this challenge by striving for optimum…

Computer Vision and Pattern Recognition · Computer Science 2023-09-29 Ke Yu , Stephen Albro , Giulia DeSalvo , Suraj Kothawade , Abdullah Rashwan , Sasan Tavakkol , Kayhan Batmanghelich , Xiaoqi Yin

Document images often have intricate layout structures, with numerous content regions (e.g. texts, figures, tables) densely arranged on each page. This makes the manual annotation of layout datasets expensive and inefficient. These…

Machine Learning · Computer Science 2021-03-31 Zejiang Shen , Jian Zhao , Melissa Dell , Yaoliang Yu , Weining Li

Active learning is the set of techniques for intelligently labeling large unlabeled datasets to reduce the labeling effort. In parallel, recent developments in self-supervised and semi-supervised learning (S4L) provide powerful techniques,…

Machine Learning · Computer Science 2020-11-17 Yao-Chun Chan , Mingchen Li , Samet Oymak

Object detection (OD), a crucial vision task, remains challenged by the lack of large training datasets with precise object localization labels. In this work, we propose ALWOD, a new framework that addresses this problem by fusing active…

Computer Vision and Pattern Recognition · Computer Science 2023-09-15 Yuting Wang , Velibor Ilic , Jiatong Li , Branislav Kisacanin , Vladimir Pavlovic

Deep learning algorithms are often said to be data hungry. The performance of such algorithms generally improve as more and more annotated data is fed into the model. While collecting unlabelled data is easier (as they can be scraped easily…

Machine Learning · Computer Science 2024-01-04 Abhishek Sinha , Shreya Singh

In recent years, deep learning has become a breakthrough technique in assisting medical image diagnosis. Supervised learning using convolutional neural networks (CNN) provides state-of-the-art performance and has served as a benchmark for…

Image and Video Processing · Electrical Eng. & Systems 2023-06-30 Tao Wang , Xinlin Zhang , Yuanbo Zhou , Junlin Lan , Tao Tan , Min Du , Qinquan Gao , Tong Tong

Active Learning (AL) promises to reduce annotation cost by prioritizing informative samples, yet its reliability is undermined when labels are noisy or when the data distribution shifts. In practice, annotators make mistakes, rare…

Machine Learning · Computer Science 2025-10-14 Atharv Goel , Sharat Agarwal , Saket Anand , Chetan Arora

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

Stream-based active learning (AL) is an efficient training data collection method, and it is used to reduce human annotation cost required in machine learning. However, it is difficult to say that the human cost is low enough because most…

Robotics · Computer Science 2023-10-04 Kanata Suzuki , Taro Sunagawa , Tomotake Sasaki , Takashi Katoh

Point-level supervised temporal action localization (PTAL) aims at recognizing and localizing actions in untrimmed videos where only a single point (frame) within every action instance is annotated in training data. Without temporal…

Computer Vision and Pattern Recognition · Computer Science 2023-10-10 Yuan Yin , Yifei Huang , Ryosuke Furuta , Yoichi Sato

Recent approaches for weakly supervised instance segmentations depend on two components: (i) a pseudo label generation model that provides instances which are consistent with a given annotation; and (ii) an instance segmentation model,…

Computer Vision and Pattern Recognition · Computer Science 2020-07-21 Aditya Arun , C. V. Jawahar , M. Pawan Kumar

Although active learning (AL) in segmentation tasks enables experts to annotate selected regions of interest (ROIs) instead of entire images, it remains highly challenging, labor-intensive, and cognitively demanding due to the blurry and…

Computer Vision and Pattern Recognition · Computer Science 2025-11-19 Md Shazid Islam , Shreyangshu Bera , Sudipta Paul , Amit K. Roy-Chowdhury

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

Because manufacturing processes evolve fast, and since production visual aspect can vary significantly on a daily basis, the ability to rapidly update machine vision based inspection systems is paramount. Unfortunately, supervised learning…

Computer Vision and Pattern Recognition · Computer Science 2021-07-23 Antoine Cordier , Deepan Das , Pierre Gutierrez

Deep Active Learning (DAL) aims to reduce labeling costs in neural-network training by prioritizing the most informative unlabeled samples for annotation. Beyond selecting which samples to label, several DAL approaches further enhance data…

Machine Learning · Computer Science 2025-12-17 Jonathan Spiegelman , Guy Amir , Guy Katz