摘要
为了保证图像显示系统能够产生120°的大视场,在系统中使用了超广角耦合物镜,这样就不可避免地存在几何畸变。提出了一种基于点物成像原理,并采用数码相机和精密单轴转台进行畸变测量的方法,介绍了测量原理和测量过程,根据测量后得到的畸变规律,采用数字图像处理的方法对几何畸变进行了校正。校正后,图像显示系统的畸变小于0.4%,完全能够满足导弹景象匹配系统定位误差及定位概率的检测要求。
The geometric distortion is caused by using the ultra wide-angle objective lens which can ensure the image display system to generate 120° large field of view. A distortion measuring method based on point object imaging theory and using digital camera and precise single-axis turntable is proposed. The principle and process of measuring are introduced. Based on the measured distortion rule, the geometric distortion is corrected by digital image process method .After the correction, the distortion of image display system is less than 0.4%. This result can meet the needs of the positioning and probability of the missile's scene matching guidance system.
出处
《光学技术》
CAS
CSCD
2004年第4期423-424,430,共3页
Optical Technique
关键词
几何畸变
畸变校正
图像显示系统
geometric distortion
distortion correction
image displaying system
