水平场景无畸变折反射全景成像系统透镜畸变的消除

Elimination of the Lens Distortion in Catadioptric Omnidirectional Distortionless Imaging System for Horizontal Scene

采用短焦距透镜设计水平场景无畸变折反射全景成像系统 ,会使系统更加小型化 ,然而短焦距透镜的畸变会对系统成像产生影响。为此建立了具有径向畸变的相机模型 ;根据这一相机模型 ,研究了采用短焦距摄像头的水平场景无畸变折反射全景成像系统中 ,透镜畸变对系统成像的影响 ,结果表明短焦距透镜的畸变会对系统成像产生严重影响 ;为了消除透镜畸变的影响 ,对反射镜的设计进行了改进 ,在反射镜面形微分方程中包含了透镜畸变消除的参量 ;按新的方法 ,设计了一套由短焦距摄像头组成的水平场景无畸变折反射全景成像系统。

By adopting short focal lens the design of the catadioptric omnidirectional distortionless imaging system for horizontal scene can miniaturize imaging system, but which may influence on system image quality due to the distortion of short focal lens. An imaging model with radial distortion is established to analyze the imaging affection of the distortion in short focal lens to the catadioptric omnidirectional distortionless imaging system for horizontal scene. The result shows that the distortion in short focal lens can depress the system image quality. To eliminate that affection, the method of mirror design is improved by adding parameters of lens distortion to the differential equations that define mirror shape. According to this new method, a catadioptric omnidirectional distortionless imaging system for horizontal scene consisting of short focal lens has been designed.