视频图像中车辆曲线运动速度计算模型的修正

Correction of the Speed Calculating Model Used in the Curvilinear Motion that in Video Images

已建立的视频图像中车辆速度计算模型在计算车辆直线行驶速度时具有很高的精度,但计算车辆曲线运动速度时会产生较大的误差.通过分析数学模型在计算车辆曲线运动速度时产生偏差的原因,探索了减小计算误差的途径和修正方法,并根据实际运用提出了转弯形态车速计算方案.

The mathematical model of computing speed which is set up by our team has very high accuracy when it is used to calculate the speed of the vehicle which is driving straight.But a large number of tests show that it would produce the bigger error when the model is used to calculate the speed of the vehicle which is traveling on curve.This paper analysed the cause of deviation,and explored ways and methods of correction to reduce the deviation of calculation,then putted forward a effective solution of speed calculation method of curvilinear motion according to the practical application.