January 10, 2020 Conference paper Open Access

Baptista, Marcia; Fernandes, Luis; Chaves, Paulo

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    "description": "<p>Unauthorized drone flying can prompt disruptions in critical facilities such as airports or railways. To prevent these situations, we propose a surveillance system that can sense malicious and/or illicit aerial targets. The idea is to track moving aerial objects using a static camera and when a tracked object is considered suspicious, the camera zooms in to take a snapshot of the target. This snapshot is then classified as an aircraft, drone, bird or cloud. In this work, we propose the classical technique of two-frame background subtraction to detect moving objects. We use the discrete Kalman filter to predict the location of each object and the Jonker-Volgenant algorithm to match objects between consecutive image frames. A deep residual network, trained with transfer learning, is used for image classification. The residual net ResNet-50 developed for the ILSVRC competition was retrained for this purpose. The performance of the system was evaluated with positive results in real-world conditions. The system was able to track multiple aerial objects with acceptable accuracy and the classification system also exhibited high performance.</p>", 
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    "title": "Tracking and Classification of Aerial Objects", 
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        "title": "Advanced Low Flying Aircrafts Detection and Tracking", 
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    "keywords": [
      "Object Tracking", 
      "Deep Learning", 
      "Residual Networks"
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    "publication_date": "2020-01-10", 
    "creators": [
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        "affiliation": "INOV Inesc Inovacao", 
        "name": "Baptista, Marcia"
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        "affiliation": "INOV Inesc Inovacao", 
        "name": "Fernandes, Luis"
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        "affiliation": "INOV Inesc Inovacao", 
        "name": "Chaves, Paulo"
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    "meeting": {
      "acronym": "INTSYS 2019", 
      "dates": "4-6 December 2019", 
      "place": "Braga, Portugal", 
      "title": "3rd EAI International Conference on Intelligent Transport Systems"
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