基于时域差动成像的车辆精细运动轨迹重构方法

为实现汽车精细轨迹自感知,提出了基于时域差动成像的汽车精细轨迹重构方法。通过控制2个成像设备的差动工作,获得具有微小时间差的连续2帧路面图像,利用图像匹配技术识别和匹配其中的纹理特征点,结合标定参数、间隔时间和拍摄高度计算出汽车的速度、方向以及横摆角,最终通过速度积分法重构出汽车精细的运动轨迹。试验结果表明,所得结果精度显著优于GPS轨迹和惯性轨迹,并可有效反映车辆运动过程中的空间占用情况。

Method of Vehicle Detailed Trajectory Reconstruction Based on Time-Domain Differential Imaging

To realize the self-perception of the vehicle detailed trajectory,this paper proposes a method of vehicle detailed trajectory reconstruction based on time-domain differential imaging.The method acquires two consecutive images of road surface with small time interval by controlling the differential operation of the two imaging devices.The image matching technology is used to identify and match the texture feature points,and the speed,direction and yaw angle of the vehicle are calculated according to the calibration parameters,interval time and shooting height.The vehicle detailed trajectory is constructed with the velocity integration method.Test result shows that the results are significantly better than the GPS trajectory and the inertial trajectory,and can effectively reflect the space occupancy during vehicle motion.