激光主动成像系统具有分辨率高、抗干扰能力强、能成三维像等特点.为了满足成像系统对扫描速度的要求,行扫描器采用了正弦扫描方式,但激光器等时发射经过扫描器后将形成扫描方向上光点的空间分布不均匀,从而造成系统所成图像的几何失真.分析了几何失真的形成机理,并根据此机理提出了两种校正算法.将这两种算法应用于仿真图像和实际的激光图像,取得了满意的效果.比较两种算法表明:采用算法2进行激光成像系统图像几何失真的校正更为合适.

Laser imaging system which can give anti-interference high-resolution three-dimensional image has been applied widely. For the sake of scan rate in imaging system, line scanner adopts sine scanning, at the same time isochronouse laser pulses output, and spatial light-spot distribution is not asymmetry. As a result, imaging geometry distortion occurs. In this paper, reason for geometry distortion is analyzed, and two amending algorithms are presented. It is satisfied that these algorithms are used in artificial image and lidar image. Comparison shows that the second algorithm fits further to image amending in lidar imaging system.