A long-distance and large-field-of-view dual-target positioning method based on a total station

A calibration method and the technology of a total station, which are applied in the field of long-distance and large field of view dual-target calibration, can solve the problems of low flexibility and low calibration accuracy, and achieve the effects of wide application scenarios, high detection accuracy, and reduced processing accuracy requirements

Active Publication Date: 2022-02-18
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER +1
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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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  • A long-distance and large-field-of-view dual-target positioning method based on a total station
  • A long-distance and large-field-of-view dual-target positioning method based on a total station
  • A long-distance and large-field-of-view dual-target positioning method based on a total station

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[0052] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0053] Technical solution of the present invention: the method device diagram is as attached figure 1 As shown, the algorithm flow is as attached figure 2 As shown, the distance between the binocular camera 3 and the marker 1 is 100m, and the distance between the total station 2 and the marker 1 should be greater than 10m. Obtain the precise three-dimensional coordinates of the markers in the coordinate system of the total station 2 through the total station 2, and then obtain the accurate relative positional relationship between the markers 1; keep the markers 1 still, and synchronize the binocular camera 3 to take pictures of the current markers Under the condition that the camera coordinate system is the world coor...

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Abstract

The invention discloses a long-distance large-field-of-view dual-target determination method based on a total station. The realization of the method includes a binocular camera, a total station and a marker. The distance between the binocular camera and the marker is 100m, so The distance between the total station and the marker is greater than 10m, and the binocular camera is electrically connected to a computer system PC; the method includes the following steps: step (1) image acquisition: use the binocular camera for image acquisition; step (2) angle Point extraction: take a marker with only one feature point, and the corner point extraction is divided into two parts: corner point detection and sub-pixel positioning; step (3) marker three-dimensional coordinate measurement: take a single marker and set it to have only one For feature points, when the number of markers is increased to meet the measurement requirements, the three-dimensional coordinates of the feature points of the markers measured by the long-distance total station are set to (X, Y, Z); step (4) camera calibration. The invention solves the problems of low calibration accuracy and low flexibility in the long-distance and large field of view in the existing calibration methods, and meets actual needs.

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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/80
CPCG06T7/80
Inventor 晋涛曹京津杨罡亢银柱王欣伟张娜王大伟程远王海涛严碧武李涛周赞东冯智慧方书博
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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