Hyperbolic concave refractive and reflective panorama camera and making method and application thereof

Abstract

The invention discloses a hyperbolic concave refractive and reflective panorama camera and a making method and application thereof. The panorama camera comprises a base and a common perspective camera which can be arranged on a vehicular platform; a hyperbolic concave reflector for reflecting pavement images is arranged in front of a lens of the common perspective camera; the optical axis of the hyperbolic concave reflector is superposed with the common perspective camera; and the hyperbolic concave reflector is connected to the base through a lifting support. The making method comprises the following steps of: establishing a hyperbolic concave refractive and reflective panorama camera model, determining the distance between the hyperbolic concave reflector and the perspective center of the common perspective camera, determining lens focus of the common perspective camera and charge coupled device (CCD) size, erecting the common perspective camera support, and calibrating the camera. The panorama camera has the characteristics of simple structure, easiness in assembly and the like, and can be used for acquiring pavement image information in the highway survey process; and the acquired images have low distortion in horizontal scenes and vertical scenes.

Description

technical field [0001] The invention relates to the fields of photogrammetry, image processing and optical design, and further relates to a camera for panoramic imaging using a hyperbolic concave mirror and a common perspective camera and its manufacture and application. Background technique [0002] The construction of expressways in our country started late, with limited construction experience and level. There are more or less diseases on the expressways that have been opened to traffic or are under construction. It directly affects the quality and normal operation of expressways. Some serious diseases, such as road surface Cracking, sinking, voiding, wrong platform, roadbed deformation, etc., will also directly threaten the driving safety of vehicles running on the expressway. Facing such a huge road network, the supporting road quality monitoring and maintenance equipment also needs to be researched and developed urgently. [0003] The traditional road surveying method...

AI Technical Summary

Problems solved by technology

However, the images directly collected by the existing catadioptric panoramic imaging system are greatly distorted and have low edge resolution. If the images are stitched together, inverse perspective transformation is required, and the real-time processing requires a large amount of calculation, which requires high requirements for computer hardware. Require

Gaspar J. et al. proposed the emergence of a horizontal equal-scale mirror (see Constant resolution omnidirectional cameras for literature, included in Proceedings of Third Workshop on Omnidirectional Vision, Copenhagen, Denmark (held with ECCV02), 2002:27-34), using the mirror surface The imaging distortion of the panoramic imaging system is small in the horizontal scene, but the distortion of the mirror in the vertical scene is very large, and the profile curve that constitutes the mirror surface has only a numerical solution, and its center position is difficult to process, resulting in almost no imaging in the center of the panorama

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