【作者】 王洁婷；

【导师】 孙大跃；

【作者基本信息】 长安大学 ， 交通信息工程及控制， 2010， 硕士

【摘要】 最近几年来,我国的高速公路路网日趋成熟,高速公路的建设也飞速的发展,高速公路的监管和运营方面面临更高的要求和挑战,本论文通过对高速公路路段的交通流以运行特征进行分析研究,对高速公路的运行状态进行评测分析,以便给高速公路的监控管理工作提供更科学可靠的依据。从而更方便有效的开展高速路网的交通调度工作,充分发挥高速公路路网的整体效益,提高路网运营管理水平和服务水平。本论文结合我国高速公路现状,从运行状况的指标体系建立、交通事件检测子系统、交通流量参数——占空比检测三个方面,对高速公路路段运行状况评价分析进行了研究。这三个方面相互联系,从不同侧面反映了路段的实时运行状况。本文基于数字图像处理和计算机视觉技术,对系统中的关键技术进行了深入研究。在系统设计方面,考虑到当前交通领域现有监控设备,设计了与之吻合的“视频图像采集模块+视频检测服务器+视频检测终端”模式。在运行状况动态综合评价研究方面,本论文根据我国高速公路的普遍现状建立综合评价指标体系；在分析现有综合评价方法的基础上,提出了适合路段运行状况的评价方法模型。该方法采用先状态分类后趋势评价的两步评价方式,将适用于时间序列的动态综合评价方法应用于路段运行状况的评价,该方法能获得比较准确的运行状态分类和运行趋势分析,适用于路段运行状况的动态实时评价。在算法的研究过程中,通过对目标检测子系统中的背景模型算法、阴影检测算法、运动目标检测算法以及运动目标跟踪算法的分析研究提出了车辆类型识别的技术：基于几何特征分类器设计算法和基于不变矩分类器设计算法,为占空比的检测提供了良好的基础。更多还原

【Abstract】 In recent years,along with the rapid development of freeway in our country,the freeway network is developing gradually.At the same time,freeway management has to be face with higher requirement and greater challenge than before.Through the study on comprehensive evaluation and analysis of operation status of freeway section,the paper provided the scientific bases and datum for freeway governor,and to improve the level of freeway network management and service,further.Considering the actuality of freeway in our country,this dissertation is studied for three important aspects on freeway section:dynamic comprehensive evaluation of operation status,the child system of incident detection and traffic flow parameters-- occupancy space. The three aspects are related to one another,and each aspect reflects the dynamic operation status of freeway section from a special side.Based on the digital image processing and the computer vision technology, the paper has conducted in-depth research in the key technologies of the system. In the aspect of system designing, considered the existing monitoring equipments in current transportation fields, the paper has designed the compatibly mode of "the video image gathering module + video detection server + video detection terminal".In the first aspect,this dissertation firstly presents the evaluation attribute system based on analyzing common attributes,then the dissertation study and analysis all existing comprehensive evaluation methods.According to the requirement of dynamic comprehensive evaluation of operation status on freeway section,the dissertation presents a new dynamic evaluation method called"classify status first,evaluate trend later".It is the first time that the dynamic comprehensive evaluation method is applied on system evaluation of traffic field.The application example proves the validity of the new method.In the study of algorithms,the paper brought forward the technology of vehicle type recognition,such as classification algorithms based on Geometrical characteristics and classification algorithms based on constant moment,thought the algorithm analysis of background model and shadow detection and moving object detection and moving target tracking.All above provided a good basis for occupancy space testing.更多还原