【作者】 谢恩；

【导师】 盛翊智；

【作者基本信息】 华中科技大学 ， 控制理论与控制工程， 2005， 硕士

【摘要】 随着我国经济的飞速发展,城市车流量高速递增,交通变得越来越拥挤。实现实时的城市交通智能监控,对于交通信息收集、规范交通管理以及减少交通事故等方面都具有重要的现实意义。论文以广东某公司的“视频检测闯红灯自动记录仪”课题为背景,在研究视频处理的运动检测基础之上,分析了各自的优缺点,提出了两种检测违章车辆的方案,形成了一种违章车辆检测算法,实际应用结果证明了这一算法的有效性。论文提出了“虚拟线圈”的概念,对传统检测系统中的线圈式检测器做了实质性的改进。传统的交通违章车辆监控是通过埋在地下的感应器或车轴传感器实现的。这种方法对路面有损坏,不方便施工安装,且要经常进行检修和维护,对道路交通影响甚大。基于计算机视频检测技术的交通监控系统,不同于传统的闯红灯车辆的检测方法。采用图像处理的视频检测方式,将停止线附近的限定区域作为监测区域,设定“虚拟线圈”,检测是否有机动车违章行为的发生,避免了交通监测系统中使用物理感应线圈对交通和道路带来的影响。论文详细阐述了“视频检测闯红灯自动记录仪”的结构、功能以及调试中出现的问题,特别介绍了实际应用环境下虚拟线圈检测算法试验的过程及积累的经验。综合使用多种视频检测技术,解决了诸如夜晚车头灯和环境变化所导致误判和漏判闯红灯违章车辆的问题。系统试运行过程中的结果表明,抓拍违章车辆闯红灯图片的记录有效率和闯红灯捕获率均达到国标GA/T 496-2004 规定的要求。论文以VC++6.0 为开发语言、WINDOWS 2000 为设计平台,综合应用图像处理、多线程、GPRS 通信等技术以及虚拟线圈匹配算法等,构建了一个实用、稳定的系统。更多还原

【Abstract】 As the global economy develops at a high speed,the number of car in cities increases rapidly,traffic jam becomes more and more seriously,monitoring the state of road traffic in real time has been significant for us to collect traffic information, standardize the management of traffic ,city layout and so on。Here, combining the task “Redlight runner recorder based on video technology”cooperated with Jing’an Corp. in Guangdong province, after analyzing respective strongpoint and shortcoming of some video detecting methods, two kinds of ideas are put forward, and then an effective algorithm of peccancy surveillance based on video technology is brought forward to settle this problem. Practical result validates the algorithm. The method of vehicle peccancy surveillance is usually achieved through inductor buried in the ground or axle sensor. This will damage the road surface, and bring much inconvenience for construction and fitting. Also they often need to be examined and repaired, all these bring lots of inconvenience. Here a method based on video technique is employed, and a new concept of loop detector which we call it virtual loop is brought forward for traffic surveillance instead of the old one which buried in the ground. The thesis explains the structure , the function of “Redlight runner recorder based on video technology”and questions appearing on program debugging in detail. Experience of accumulation and procedures on testing algorithm under the real environment are especially introduced . Using many kinds of video detection technique synthetically , problems of miscarriage and escape of justice resulting from such as car headlight and environmental change are solved . Test run shows the cameraing percentage and validity of pictures reach the fixed demand of national standard GA/T 496-2004 . The system is exploited on the flatform of Win2000 with C/C++ language, its setting up deals with image process, multithreading, GPRS and serial port communication and so forth, all the parts work in line to bulid a banausic and steady system.更多还原