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Ten Years of Active Learning Techniques and Object Detection: A Systematic Review

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APPLIED SCIENCES-BASEL
卷 13, 期 19, 页码 -

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MDPI
DOI: 10.3390/app131910667

关键词

active learning; sampling strategies; acquisition function; object detection; score; confidence; uncertainty; diversity; aggregation

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This article provides a comprehensive and systematic review of object detection (OD) and active learning (AL) techniques. It analyzes articles from reputable databases published between 2010 and December 2022, and also examines the geographical distribution of OD researchers worldwide. The study identifies promising research opportunities to enhance the AL process, including the development of novel sampling strategies and their integration with different learning techniques.
Object detection (OD) coupled with active learning (AL) has emerged as a powerful synergy in the field of computer vision, harnessing the capabilities of machine learning (ML) to automatically identify and perform image-based objects localisation while actively engaging human expertise to iteratively enhance model performance and foster machine-based knowledge expansion. Their prior success, demonstrated in a wide range of fields (e.g., industry and medicine), motivated this work, in which a comprehensive and systematic review of OD and AL techniques was carried out, considering reputed technical/scientific publication databases-such as ScienceDirect, IEEE, PubMed, and arXiv-and a temporal range between 2010 and December 2022. The primary inclusion criterion for papers in this review was the application of AL techniques for OD tasks, regardless of the field of application. A total of 852 articles were analysed, and 60 articles were included after full screening. Among the remaining ones, relevant topics such as AL sampling strategies used for OD tasks and groups categorisation can be found, along with details regarding the deep neural network architectures employed, application domains, and approaches used to blend learning techniques with those sampling strategies. Furthermore, an analysis of the geographical distribution of OD researchers across the globe and their affiliated organisations was conducted, providing a comprehensive overview of the research landscape in this field. Finally, promising research opportunities to enhance the AL process were identified, including the development of novel sampling strategies and their integration with different learning techniques.

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