车载摄影摄像装置图像偏移与动态几何像差的分析

The analysis of the image excursion and dynamic geometrical aberration occurring in vehicle-borne cameras used for road surface status inspection

对利用车载摄影摄像装置进行路面检测的检测车,由于检测车行驶时车身存在振动,其检测精度由图像偏移量与动态几何像差决定。为提高检测精度,必须确定任一时刻的图像偏移量与动态几何像差并对其进行补偿。利用刚体绕定点有限转动的欧拉定理推导了图像偏移函数与动态几何像差函数,计算了为使图像清晰而需在任一时刻对图像的偏移进行补偿的补偿量和对焦距、像面位置、透镜位置进行调整的调整量。研究为图像偏移和动态几何像差补偿的实现奠定了理论基础。

For road surface status tester using vehicle-borne cameras,the vibrations generated by the traveling of the tester greatly influence the precision of the inspection which is determined by image excursion and dynamic geometrical aberration.To improve the inspection precision,the calculation of the image excursion and dynamic geometrical aberration at anytime is necessary to determine the corresponding compensations.Image excursion function and dynamic geometrical aberration function are derived using Euler theorem,which are used to calculate the compensations of image excursion and regulations of the focal length as well as the positions of the image planes and lenses.The research proves in theory that compensating image excursion and dynamic geometrical aberration is feasible.