[信息与通信]王聪-基于嵌入式的车牌识别系统的研究_完整.doc

基于嵌入式的车牌识别系统的研究 摘要 智能交通系统（ITS）是未来交通发展的必然趋势，是电子信息技术在交通运输领域应用的前沿研究课题。车牌识别系统是现代智能交通管理的重要组成部分，在交通管理、治安检查中有着很广阔的应用前景。车牌识别系统主要涉及计算机视觉、数字图像处理、模式识别等多个科学技术领域。目前，许多车牌识别系统都是基于PC机的，但是由于PC机体积大、工作环境要求高等各方面的原因，使其推广应用受到了很大的限制。而使用嵌入式技术构建的车牌识别系统，具有集成度高、安装方便、操作简单、扩充性好等特点，同时，也能应对交通系统中天气情况复杂的工作要求，因此具有广阔的应用前景。 本文对车牌识别系统及其嵌入式实现进行了研究，研究内容主要包括系统的软件实现和系统的硬件移植。文中首先介绍了系统的总体设计方案和系统的软硬件平台。然后论述了一个完整的车牌识别系统包括车辆图像预处理、车牌定位、字符分割和字符识别等四大部分，对每部分都详细介绍了基本原理及实现算法，而在计算机上对程序的仿真也取得了较高的车牌识别率。接着介绍了在OK6410开发板上的程序移植过程，在开发板上也有比较理想的识别效果。最后，指出了系统需要进一步研究和完善的地方。 关键词 车牌定位 字符分割 字符识别 开源计算机视觉 Qt Abstact Intelligent traffic system (ITS) is the inevitable development trend of the future traffic and the front issues in the field of electronic informations application in traffic and transformation. License plate recognition system is the key part of modern intelligent traffic management, and has a wide application prospect in traffic management and security test fields. Involving in many technologies like the computer vision, digital picture treatment, pattern recognition. Many license plate recognition systems are based on PC now. However, it extension has been largely limited by its big size and high requirement for the environment. However, license plate recognition system based on embedded technology has the characteristics of high Integration level, easy installation, simple operation and perfect extensibility. In addition, this technology can apply for various complicated weather condition. So, it has a wide application prospect. This article studies on the license plate recognition system and its realization on embedded system. The research contents include the software realization and the hardware transplantation of the system. First, this paper introduces the overall design, the hardware platform and the software platform of the system. Then this paper discusses a complete license plate recognition system, including four parts:vehicle image preprocessing, license plate localization, character s