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    • 2. 发明授权
    • Automatic vehicle identification (AVI) system employing planar laser illumination and imaging (PLIIM) based subsystems
    • 采用平面激光照明和成像(PLIIM)的子系统的自动车辆识别(AVI)系统
    • US06959869B2
    • 2005-11-01
    • US10161091
    • 2002-05-31
    • Constantine J. TsikosC. Harry KnowlesXiaoxun ZhuMichael D. Schnee
    • Constantine J. TsikosC. Harry KnowlesXiaoxun ZhuMichael D. Schnee
    • G02B6/42G06C11/08G06F17/00G06K7/10G06K7/14G06K9/22G07B15/06H01S3/00H01S3/08H01S5/00H01S5/022H01S5/40
    • G06K9/26G02B27/48G06K7/10594G06K9/325G07B15/06H01S5/005H01S5/02248H01S5/4025
    • An automatic vehicle identification (AVI) system for installation along a roadway, comprising one or more a planar laser illumination and imaging (PLIIM) based linear imaging subsystems mounted above the roadway in a spaced apart manner. The PLIIM based subsystems are arranged for capturing digital linear images of both the front and rear license plates mounted on each moving vehicle travelling under the PLIIM based linear imaging subsystem, and generating digital image data representative of each captured digital linear image. An image processing subsystem is provided for receiving and processing the digital image data generated by the PLIIM-based imaging systems, so as to automatically read the alphanumeric strings on the front and/or rear license plates of each the vehicle. These recognized strings are then compared against vehicle registration information stored in a database in order to identify each vehicle travelling under along the roadway. By virtual of the present invention, it is now possible to capture and buffer high-resolution linear images of the license plates on moving vehicles using planar laser illumination beams and coplanar fields of view, so that these linear images can be sequentially assembled to construct 2-D images for OCR processing so that such vehicles can be automatically identified, while avoiding the need for large and expensive high-intensity lighting equipment required by conventional digital cameras employing 2-D electronic image detectors.
    • 一种用于沿道路安装的自动车辆识别(AVI)系统,包括以间隔开的方式安装在道路上方的一个或多个基于平面激光照明和成像(PLIIM)的线性成像子系统。 基于PLIIM的子系统被布置用于捕获安装在基于PLIIM的线性成像子系统下的每个移动车辆上的前后车牌的数字线性图像,以及生成表示每个捕获的数字线性图像的数字图像数据。 提供图像处理子系统,用于接收和处理由基于PLIIM的成像系统产生的数字图像数据,以便自动读取每个车辆的前部和/或后部车牌上的字母数字串。 然后将这些识别的字符串与存储在数据库中的车辆登记信息进行比较,以便识别沿着道路行进的每辆车辆。 通过本发明,现在可以使用平面激光照明光束和共面视场来捕获并缓冲移动车辆上的车牌的高分辨率线性图像,使得这些线性图像可以被顺序组装以构成2 -D图像,以便能够自动识别这种车辆,同时避免需要使用2-D电子图像检测器的常规数字照相机所需的大型和昂贵的高强度照明设备。