一种基于同心圆环的图像畸变校正方法

分析了光学成像系统中畸变校正的原理，采用了新的确定畸变中心的方法——同心圆环法；通过选取对应关系，采用多项式拟合技术，确定了该光学系统畸变的非线性变换的明确表达式，进而编程实现了畸变图像的空间变换和灰度变换，得到了校正后的图像，实现了畸变校正．

A concentric Ring Model of Image Distortion Correction Method

Distortion always exists in optical image-forming system,especially in a large field of view.The distortion should be corrected to obtain precise image.This essay analyses the correcting theory in optically imaging system.A new method called concentric ring,for calibrating the center of the distortion is adopted; according to the selection of relationship between the undistorted-to-distorted,and polynomial fitting,the relation function of non-linear transformation in the optical system is settled,then programming to obtain the location and the shade of gray transformation of every dot,then the correcting process is completed.