低视角单目摄像机下3D空间的运动轨迹提取  

Trajectory Extraction in 3D Space from Low Camera

作　　者：赵倩倩[1] 宋焕生[1,2] 徐晓娟[1] 彭玲玲[1] 

机构地区：[1]长安大学信息与工程学院,陕西西安710064 [2]陕西省道路交通智能检测与装备工程技术研究中心,陕西西安710064

出　　处：《电视技术》2015年第3期115-118,共4页Video Engineering

基　　金：国家"863"计划项目(2012AA112312)

摘　　要：由于摄像机安装高度和角度的限制,采集到的视频图像有时存在车辆之间的遮挡和尺度变化等问题。提出一种低视角单目摄像机下3D空间的运动轨迹提取方法,利用垂足信息求得特征点的三维信息,再由高度区分稳定特征点和不稳定特征点。对稳定特征点进行跟踪,根据三维信息形成空间轨迹。实验结果表明,该方法可以较好地解决车辆之间存在遮挡和尺度变化等情况下的轨迹分析问题。Due to the limitation of camera＇ s height and angle, occlusion and perspective between vehicles can be seen in video im- ages. A method for trajectory extraction in 3D space using a camera that is low to the ground is presented. The 3D information of feature point is obtained by utilizing pedal information. The stable feature point and unstable feature point can be distinguished u- sing height infurmation. Trajectories in 3D space are formed by 3D information when the stable feature points are tracked. Experi- mental results show that occlusion and perspective between vehicles can be settled successfully with this method.

关 键 词：遮挡 特征点跟踪 车辆跟踪 3D轨迹提取 

分 类 号：TN911.73[电子电信—通信与信息系统] TP317.4[电子电信—信息与通信工程]