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  • 标题:屋外環境下における走行中の車両のナンバープレート認識
  • 本地全文:下载
  • 作者:内藤 貴志 ; 塚田 敏彦 ; 山田 啓一
  • 期刊名称:映像情報メディア学会誌
  • 印刷版ISSN:1342-6907
  • 电子版ISSN:1881-6908
  • 出版年度:1999
  • 卷号:53
  • 期号:5
  • 页码:730-737
  • DOI:10.3169/itej.53.730
  • 出版社:The Institute of Image Information and Television Engineers
  • 摘要:This paper presents novel methods of recognizing vehicle license plates robustly. To acquire fine images of quickly passing vehicles under a wide range of illumination conditions, we developed a sensing system having superb characteristics. We expanded the dynamic range and eliminated the blurring of images of fast moving vehicles by synthesizing a pair of synchronized images with different intensities. Furthermore, to extend the flexibility of the positioning of the TV camera, we propose a recognition algorithm which can be applied to inclined plates. The performance of the integrated system was investigated on real images of highly inclined plates of vehicles captured under various illumination conditions. The recognition rate of 97% shows that the developed system is effective for license plate recognition.
  • 关键词:ナンバープレート認識;ダイナミックレンジ;CCDカメラ;画像処理;文字認識
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