Calibration method, device, electronic device and readable storage medium for measurement system

Abstract

Embodiments of the present invention provide a calibration method, device, electronic equipment, and readable storage medium for a measurement system, which are applied in the field of machine vision technology. The method includes: according to the positional relationship between the laser and the calibration block, obtaining The three-dimensional first coordinates of the at least three non-collinear vertices in the laser coordinate system respectively. Obtaining the contour map of the cross-section of the calibration block under the irradiation of the line laser generated by the laser, and determining the two-dimensional pixel coordinates of at least three non-collinear vertices in the image coordinate system where the contour map is located. According to the pre-acquired internal parameters and distortion coefficients of the camera, as well as the first three-dimensional coordinates and the two-dimensional pixel coordinates, the external parameters of the camera are determined. According to the external parameters of the camera and the first three-dimensional coordinates, the light plane equation of the light plane formed by the line laser in the camera coordinate system is determined. The calibration method in the embodiment of the present invention is simple and quick, and is suitable for on-site calibration.

Description

technical field [0001] The invention relates to the technical field of machine vision, in particular to a calibration method, device, electronic equipment and readable storage medium of a measuring system. Background technique [0002] In the image measurement process and machine vision applications, in order to determine the relationship between the three-dimensional geometric position of a point on the surface of a space object and the corresponding point in the image of the space object, a geometric model of camera imaging must be established. The geometric model parameters include: camera parameters and light plane equations, wherein the camera parameters include: camera intrinsic parameters, camera extrinsic parameters and distortion coefficients. The internal reference of the camera refers to the focal length f of the camera in the x-direction and y-direction x and f y , and the image center coordinates (u 0 , v 0 ), the distortion coefficient refers to the radial ...

AI Technical Summary

Problems solved by technology

It can be seen that this method needs to place the calibration blocks in different positions, and then extract multiple pictures, so the operation of this method is relatively cumbersome

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