【作者】 刘伟；

【导师】 肖梅；

【作者基本信息】 长安大学 ， 载运工具运用工程， 2014， 硕士

【摘要】 近年来，基于图像处理的交通信息检测技术成了交通领域研究的热点。作为交通信息检测的重要组成部分，图像处理的车速检测系统有着广泛的应用前景。因此，进行车速检测方法的研究具有重要的意义。论文对基于图像处理的车速检测系统和车速检测算法进行了研究，设计了适用于车速检测的一维和二维摄像机标定方法。论文的工作主要内容有以下几点：1.视频车速检测系统。论文对车速检测系统进行了详细的研究，分析现在存在的难点，针对本文设计了车速检测系统的硬件结构和软件结构。2.摄像机标定方法。将基于线性模型的一维标定扩展到二维标定，提高了摄像机标定的精度。3.车速检测算法。论文通过图像处理提取目标车辆，获得目标车辆的特征点，对特征点运行轨迹进行拟合，结合摄像机标定将每一帧之间的像素距离转化为实际距离，最后对得到的距离和时间数据进行数据拟合，获得目标车辆的行驶速度。本文设计了一种实用的车速检测方法，在城市道路中进行了测试，能够实现车辆瞬时速度的实时检测，在实际应用中精度达到95%以上。本设计可以满足实际应用要求，可应用于城市道理车速检测，车速调查等方面。更多还原

【Abstract】 In recent years, traffic information detection based on image processing technology hasbecome a hot research field of traffic. As an important part of traffic information detection,and image processing speed detection system has broad application prospects. Therefore, thevehicle speed detection study has important significance.Papers for speed detection systems and vehicle detection algorithm based on imageprocessing were studied design suitable for vehicle speed detection of one-dimensional andtwo-dimensional camera calibration methods. The main contents of the thesis work are thefollowing:1. Video vehicle detection system. Papers for speed detection system carried out adetailed research, analysis now from the difficulties, the paper design for hardware andsoftware structure composed speed detection system.2. Camera calibration methods. The calibration of linear model based on onedimensional extended to two-dimensional calibration, improved camera calibration accuracy.3. Speed detection algorithm. Paper extracted by the image processing of the targetvehicle, to obtain the feature points of the target vehicle, the feature point trajectory fittingcombination camera calibration distance in pixels between each frame will be converted tothe actual distance to calculate the vehicle speed.This paper presents a practical speed detection methods were tested in the city roads, theinstantaneous speed of the vehicle can achieve real-time detection, in the practical applicationmore than95%accuracy. This design can meet the requirements of practical application, thetruth can be applied to urban speed detection, speed and other aspects of the investigation.更多还原