利用线阵像机估计目标运动参数

Estimation of Target's Motion Parameters Using Line-scan Camera

针对线阵像机拍摄运动目标获得的目标变形的扫描影像,本文提出了一种利用线阵像机估计目标运动参数的新方法。该方法根据线阵像机的一维成像模型,采用目标上特征点之间关于时间和空间的成像关系,构建了关于目标运动参数的非线性方程组,将目标方位、速度等运动参数的估计问题转化为非线性最优化求解问题。在交通车辆运动分析中利用车牌照的线阵成像变形,实现对车辆运动速度、方向的估计。实验结果表明,该方法具有较好的实用性和估计精度。

Referring to the deformed scan image of the moving target obtained by a line-scan camera,a new method was proposed to estimate the motion parameters using a line-scan camera.The method,based on one-dimension imagery model of the line-scan camera,made use of the temporal and spatial relations of the key points on the target image to establish a serial of nonlinear functions related to the motion parameters,which transforms the estimation of the motion parameters into a problem of nonlinear optimization.In the analysis of the deformed license plate images of the moving vehicles,speed and direction were estimated.The experiment results show that,the method has good practicability and accuracy.