基于畸变率的图像几何校正  

Image geometric correction based on distortion ratio

作　　者：崔洪州[1] 孔渊[1] 周起勃[1] 潘兆鑫[1] 葛军[1] 

机构地区：[1]中国科学院上海技术物理研究所第五研究室,上海200083

出　　处：《应用光学》2006年第3期183-185,215,共4页Journal of Applied Optics

摘　　要：大视场成像光学系统中的畸变会降低图像质量,必须预以校正。提出一种新的校正方法,即根据畸变率的定义推导出畸变校正公式。根据公式,在镜头畸变率已知的情况下可以很容易地校正畸变。对于畸变率未知的情况,给出了建立畸变模型的方法,通过畸变模型可近似计算畸变率。得出通过控制畸变模型中某一个形状的参数可以控制畸变量大小的结论。提出的方法已经在实际工程中采用。实践证明,这种模型可以满足大多数镜头的畸变校正要求。Distortion in optical lenses for wide field of view application, which reduces image quality, has to be corrected. A new correction method is proposed in this paper, and the distortion correction formula is deduced based on the definition of distortion coefficient. It＇s easy to correct the distortion with this method when the lens＇s distortion data is known. A distortion model is presented for the lens with unknown distortion data, through which the distortion data can be calculated. A conclusion for controlling distortion can be obtained by controlling a certain parameter in the distortion model. The practical use of the distortion correction method presented in this paper proved that the model could meet the requirement of distortion correction of lenses in most cases.

关 键 词：几何畸变 畸变模型 数字校正 图像处理 

分 类 号：TN911.74[电子电信—通信与信息系统]