Cylindrical surface coordinate based camera calibration target of automobile vision detection system

Abstract

The invention discloses a cylindrical surface coordinate based camera calibration target of an automobile vision detection system, for the purpose of solving the problem that a conventional three-dimensional calibration object can only directly obtain three-dimensional data points under the condition of a Descartes three-dimensional rectangular coordinate system and cannot obtain data points decided by a cylindrical surface radius and an angle under the condition of a cylindrical surface coordinate system. The cylindrical surface coordinate based camera calibration target of the automobile vision detection system is mainly composed of a base (1) and a column coordinate surface (2). The cylindrical surface coordinate based camera calibration target of the automobile vision detection system has the advantages of simple structure, high detection precision, small accumulation errors, complete functions, simple operation, easy installation, high versatility, quite low cost and reliable performance, and can satisfy the requirement for visual sense detection of an automobile body in the automobile detection industry.

Description

technical field [0001] The invention relates to an inspection device in the field of automobile industry, more specifically, it relates to a camera calibration target of an automobile visual inspection system based on cylindrical coordinates. Background technique [0002] In order to ensure the safe driving of the car, it is one of the main inspection items in the field of automobile inspection to detect the overloading and size modification of the automobile reasonably and quickly, and to carry out the visual measurement of various geometric angles of the automobile. At present, the measurement of vehicle size and angle is mainly based on manual meter ruler measurement, which has low efficiency, poor accuracy and high labor intensity for staff. The use of machine vision measurement technology for non-contact detection of automotive geometric parameters is expected to solve the above technical bottlenecks due to its characteristics of fast, accurate and high reliability. Si...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem that the existing three-dimensional calibration objects can only directly obtain the three-dimensional data points in the Cartesian three-dimensional Cartesian coordinate system, but cannot obtain the data points determined by the cylinder radius and angle in the cylindrical coordinate system, and provides a A kind of cylindrical coordinates that can directly obtain the data points of the general position of the space under the cylindrical coordinate system, simple structure, high detection accuracy, small cumulative error, complete function, simple operation, easy installation, strong versatility, low cost and reliable performance The camera calibration target of the automotive visual inspection system based on cylindrical coordinates, which can meet the requirements of the automotive inspection industry for visual inspection of automobile angle parameters

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