Spherical pair centering and one-dimensional calibration target for automobile topography visual detection system

Abstract

The invention discloses a spherical pair centering and one-dimensional calibration target for an automobile topography visual detection system and aims to solve the problem about centering rotation required by calibration of the one-dimensional calibration target for the automobile topography visual detection system. The spherical pair centering and one-dimensional calibration target for the automobile topography visual detection system mainly comprises a camera support (1), a camera (2), a spherical pair type target rod (3), conical targets (4) and a base (5), wherein the spherical pair type target rod (3) can rotate to any position around the center of a spherical surface pit of the base (5), the system acquires images of the conical targets (4) through the camera (2), and all parameters of the camera (2) are calibrated according to the images, acquired by the camera (2), of the conical targets (4) in multiple positions. The spherical pair centering and one-dimensional calibration target for the automobile topography visual detection system is simple in structure, high in detection accuracy, simple and convenient to operate, easy to mount, lower in cost and reliable in performance.

Description

technical field [0001] The invention relates to a verification device of a detection device in the field of the automobile industry, more specifically, it relates to a spherical pair centering one-dimensional calibration target of a visual detection system for the appearance of an automobile. Background technique [0002] The one-dimensional calibration method of the automobile appearance visual inspection system consists of multiple collinear points with known distances from each other, and takes multiple images of the one-dimensional calibration object in different poses, and uses the correspondence relationship between the image points of the one-dimensional calibration object That is, the geometric information contained in the one-dimensional calibration object establishes constraint equations to achieve camera calibration. If the one-dimensional calibration object moves freely in space, it will not satisfy the constraints. Using a spherical pair to make the one-dimensi...

AI Technical Summary

Problems solved by technology

[0003] The invention aims at the problem that the one-dimensional calibration object needs to move around a fixed contact point when calibrating the camera of the automobile appearance visual detection system, and provides a simple structure, high detection accuracy, small cumulative error, complete function, simple operation, easy installation, and general purpose Spherical vice-centered one-dimensional calibration target of the automobile shape visual inspection system with strong performance, low cost and reliable performance, which can meet the requirements of the automobile inspection industry for the verification of the automobile body shape inspection system

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