Concave hyperboloidal catadioptric omnidirectional imaging system

Mirror is an important part of catadioptric omnidirectional imaging system. Aiming at different application, several kinds of mirror such as hyperboloid surface, ellipsoidal surface, parabolic surface and some others were designed for the system. However, the image of these systems has large distortion and low resolution on the edge of picture. In order to make the system suitable for pavement survey, based on front projection model, concave hyperboloid mirror was designed. Imaging features of horizontal scene was analyzed for new system. The simulation results show that by optimization of distance between omnidirectional viewpoint and focus of mirror, new system attains low distorted imaging features compared with systems consist of hyperboloidal mirror or horizontal distortionless mirror.