Method and system for determining position relationship between alignment camera and optical device

Abstract

The invention discloses a method and system for determining the position relation between an alignment camera and an optical device, and the method comprises the steps that the optical device projectsa picture to a calibration camera, and a processing module records the position of the optical device as a first mark point coordinate after the calibration camera obtains the projected picture; thealignment camera moves and grabs a grabbing point on the calibration camera, and the processing module records the position of the alignment camera as a second mark point coordinate; the processing module calculates a first position difference coordinate between the alignment camera and the optical device according to the first mark point coordinate, the second mark point coordinate and an off-center coordinate of the center position of the grabbing point and the calibration camera. According to the invention, the problem that the alignment camera directly grabs the chip contour of the calibration camera and cannot grab the chip contour is avoided.

Description

technical field [0001] The invention relates to the technical field of camera calibration, in particular to a method and system for determining the positional relationship between an alignment camera and an optical device. 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 its corresponding point in the image, it is necessary to establish a geometric model of camera imaging, and these geometric model parameters are camera parameters. Under most conditions, these parameters must be obtained through experiments and calculations. This process of solving parameters is called camera calibration (or camera calibration). Whether it is in image measurement or machine vision applications, the calibration of camera parameters is a very critical link. The accuracy of the calibration results and the stability...

AI Technical Summary

Problems solved by technology

In this solution, in order to ensure the reliability of the projection of the optical device on the calibration camera, it is necessary to install a light attenuation film on the calibration camera, but the installed light attenuation film will make it difficult for the alignment camera to capture the rectangular chip outline of the calibration camera

Images