广角镜头畸变测量及校正方法研究  

Distortion measurement and correction method of wide-angle lens

作　　者：曹佃生[1] 

机构地区：[1]中国科学院长春光学机密机械与物理研究所,长春130033

出　　处：《电子测量与仪器学报》2015年第8期1210-1215,共6页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金(41105014)资助项目

摘　　要：为了提高广角气溶胶探测仪的成像质量,提出了根据实验测量的拟合数据对图像进行畸变校正的方法。使用平行光管配合精密转台对探测仪光学系统的畸变量进行了实验测量,对畸变测量数据进行了多项式拟合,得到了光学系统在整个视场内的畸变量分布。实验结果表明,通过坐标变换与灰度校正,可以使探测仪采集图像的最大畸变量由10个像元偏移量(0.14 mm)减小到2个像元偏移量(0.028 mm)。采用基于实验测量畸变对所采集图像进行校正的方法,可以有针对性的对系统畸变进行校正,提高成像质量。In order to improve the imaging quality of the wide-angle aerosol detector, a distortion correction method based on experimental measurement and data fitting was proposed. The distortion of the system was measured using collimator and precise rotating platform. The polynomial fitting of the experimental datum was carried out to obtain the distortion distribution of the optical system in the entire field of view. The results show that the maximum distortion of the aerosol imager is reduced from 10 pixel offsets （0.14 ram） to 2 pixel offsets （0.028 mm） after the coordinate transformation and gray correction. Using the method based on experimental measurement to correct the image distortion, the distortion of the optical system can be corrected pertinently and the image quality can be improved.

关 键 词：畸变测量 畸变校正 灰度校正 图像处理 

分 类 号：O435[机械工程—光学工程] TN216[理学—光学]