Total station-based remote large-view-field binocular calibration method

Abstract

The invention discloses a total station-based remote large-view-field binocular calibration method. For realizing the method, the method involves a binocular camera, a total station and a marker, wherein a distance between the binocular camera and the marker is 100m; the distance between the total station and the marker is greater than 10m; and the binocular camera is electrically connected with acomputer system PC. The method comprises the following steps of (1), performing image acquisition: carrying out the image acquisition by utilizing the binocular camera; (2) performing angular point extraction: adopting a characteristic that one marker only has one feature point, wherein the angular point extraction is divided into two parts including angular point detection and sub-pixel positioning; (3) performing marker three-dimensional coordinate measurement: setting a single marker to only have one feature point, and when the number of markers is increased for meeting measurement demands, setting three-dimensional coordinates of the feature point of the marker measured by remotely utilizing the total station to be (X, Y, Z); and (4), performing camera calibration. The calibration method solves the problems of low precision and low flexibility of remote large-view-field calibration in an existing calibration method, and meets actual demands.

Description

technical field [0001] The invention relates to the field of double-target positioning, in particular to a long-distance large-field double-target positioning method based on a total station. Background technique [0002] The rapid development of computer technology enables computers to replace human senses to obtain and process information. To construct and identify targets, it is necessary to use cameras to obtain image information and calculate its various values ​​in three-dimensional space. The correspondence between the points in the image and the points on the surface of the corresponding space object The relationship conforms to the ensemble model of camera imaging. Therefore, the process of calculating the camera parameters through experiments to obtain the camera ensemble model is called camera calibration. Whether it is in image measurement or machine vision applications, camera parameter calibration is a very critical link. The accuracy of the calibration results...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a long-distance large field of view dual-target calibration method based on a total station, aiming to solve the problems of low calibration accuracy and low flexibility in long-distance large field of view calibration methods in existing calibration methods, and to meet actual use needs

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