Calibration system for stereo camera

Abstract

The invention discloses a calibration system for a stereo camera. The calibration system comprises a flat-screen liquid crystal display and perpendicular guide rails, wherein the perpendicular guide rails are symmetrically arranged on two sides in front of the flat-screen liquid crystal display; each perpendicular guide rail is provided with two sliding blocks which can move on the perpendicular guide rail; the side surfaces of the perpendicular guide rails are provided with threaded holes which are uniformly arranged at intervals; the sliding blocks are provided with through holes; bolts are arranged in the through holes in the sliding blocks in a penetration manner to be in threaded connection with the threaded holes in the perpendicular guide rails to fix the sliding blocks on the perpendicular guide rails; the sliding blocks are provided with the stereo camera; the flat-screen liquid crystal display displays a black card checkerboard grid pattern used for calibrating the stereo camera. The calibration system for the stereo camera, which is provided by the invention, is moved up and down on the perpendicular guide rails by adopting the sliding blocks; the stereo camera is guaranteed to carry out shooting at different heights; the spatial arrangement is flexible; the rotation of the flat-screen liquid crystal display is controlled through a control system; the shooting levelness of the stereo camera is adjusted through a horizontal check meter; the calibration effect and precision and the calibration efficiency of the camera are improved.

Description

technical field [0001] The invention belongs to the technical fields of photogrammetry and visual measurement, and in particular relates to a calibration system of a stereo camera. Background technique [0002] With the advent of computers, obtaining the geometry and texture information of the object through computer image processing and projective geometry has become a research hotspot in the field of digital photogrammetry and computer vision. Whether it is the earliest film camera or the current digital camera, the obtained There are large or small distortions in the images, and the difference in distortion is caused by the difference in camera structure and imaging mechanism. Therefore, in order to use these images for high-precision measurement, it is necessary to measure and compensate the necessary camera distortion difference, and at the same time, it is also necessary to accurately measure the principal distance of the camera and the coordinates of the principal poi...

AI Technical Summary

Problems solved by technology

They are often difficult to obtain a set of methods that have the best of both worlds in terms of precision and practical convenience

For high-precision camera calibration, they usually require a high-precision three-dimensional control field (especially a high-precision indoor three-dimensional control field); and for practical and convenient calibration methods, the accuracy is often not too high

In addition, the existing camera calibration system needs to build a special laboratory environment, which is expensive to use. Camera calibration is performed with a high-precision 3D control field as a reference object. There are difficulties in establishing a 3D control field and regular professional maintenance. Due to the 3D control field The field cannot be moved, and the practical application is greatly limited

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