激光振镜扫描系统的快速软件校正算法研究

针对激光振镜扫描系统的图形畸变，根据由成像系统引起的几何畸变的后验校正法提出一种二次曲线校正模型．对于图形中每一条发生几何畸变后的直线，用二次曲线在水平和竖直方向去拟合，然后求得反变化的校正函数来校正图形的畸变，从而获得了一种准确快速的校正算法．该算法先拟合像场平面中最大边界直线发生畸变后的曲线，再求它的畸变量，并按比例求得像场中其他直线的畸变量．该算法的校正函数比从振镜扫描系统几何畸变公式导出的校正函数简单、实用，所用时间少．

Calibartion arithmetic of the quick software for laser galvanom scanning system

According to the graphic distortion of the laser galvanom, a kind of conic calibration model was put forward based on post-validation of geometry distortion caused by the imaging system. For every distorted beeline in a graphics, it was imitated by a conic at the horizontal and vertical direction and the graphic distortion was calibrated through the acquired invert-changing calibration function. An accurate and quick calibration arithmetic was obtained: the distorted boundary beeline in the image field was imitated, the distorted size was calculated and the distorted size of other beelines were obtained prorata. This calibration function of the arithmetic was simpler, more practical and cost less time than that one educed from geometry distortion formula in the laser galvanom scanning system. This method was applied and the perfect graphics were obtained.