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Long Distance Vehicle License Plate Region Detection Using Low Resolution Feature of License Plate Region in Road View Images

로드뷰 영상에서 번호판 영역의 저해상도 특징을 이용한 원거리 자동차 번호판 영역 검출

  • Oh, Myoung-Kwan (Dept. of Electrical & Electronics Service, Hyejeon College) ;
  • Park, Jong-Cheon (Dept. of Computer Engineering, Chungbuk National University)
  • 오명관 (혜전대학교 전기전자서비스과) ;
  • 박종천 (충북대학교 컴퓨터공학과)
  • Received : 2016.11.21
  • Accepted : 2017.01.20
  • Published : 2017.01.28

Abstract

For privacy protection, we propose a vehicle license plate region detection method in road view image served from portal site. Because vehicle license plate regions in road view images have different feature depending on distance, long distance vehicle license plate regions are not detected by feature of low resolution. Therefore, we suggest a method to detect short distance vehicle license plate regions by edge feature and long distance vehicle license plate regions using MSER feature. And then, we select candidate region of vehicle license plate region from detected region of each method, because the number of the vehicle license plate has a structural feature, we used it to detect the final vehicle license plate region. As the experiment result, we got a recall rate of 93%, precision rate of 75%, and F-Score rate of 80% in various road view images.

Keywords

Road View;License Plate;Scene Number Detection;MSER;Low Resolution Feature

Acknowledgement

Supported by : Hyejeon College

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