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Target-based measurement coordinate error correction method

A technology for measuring coordinates and error correction, applied in the field of image recognition, can solve problems such as measurement errors, and achieve the effect of increasing flexibility and reducing measurement errors

Pending Publication Date: 2022-02-18
CHANGZHOU ARCHITECTUAL RES INST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problem of measurement error in the deformation monitoring method based on machine vision in the prior art

Method used

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  • Target-based measurement coordinate error correction method
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  • Target-based measurement coordinate error correction method

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Embodiment Construction

[0041] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0042] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

[0043] A t...

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Abstract

The invention discloses a target-based measurement coordinate error correction method. The method comprises steps of marking a plurality of feature points in a target, and measuring a distance Dn between each feature point and the center of the target; setting the center of the target as a reference point O, and measuring the three-dimensional coordinates (x0, y0, z0) of the reference point O; calculating the size L of each pixel point in the initial image, and obtaining the three-dimensional coordinates (xn, yn, zn) of each feature point in the initial image; the distance Dn between each feature point and the center of the target being determined again according to the size L of the pixel points, the three-dimensional coordinates (x'n, y'n and z'n) of each feature point in the next frame of image being obtained, and three-dimensional coordinates (xn, yn and zn) of each feature point and the three-dimensional coordinates (x'n, y'n and z'n) being compared and corrected. The method is advantaged in that coordinate measurement errors can be reduced.

Description

technical field [0001] The invention relates to the technical field of image recognition, in particular to a target-based method for correcting measurement coordinate errors. Background technique [0002] Deformation monitoring of municipal, bridge, water conservancy, civil engineering and other projects is an important content of structural health monitoring and an important indicator for evaluating structural stability. Conventional measurement methods represented by level gauges and total stations etc. These monitoring methods have a large workload and are greatly affected by the operation mode of the instrument. Therefore, the deformation monitoring measurement technology based on machine vision is derived, which integrates photogrammetry, image processing and computer technology, processes the image through the computer, and compares the changes of the target point image in the image sequence to calculate the two-dimensional displacement and deformation. [0003] For e...

Claims

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Application Information

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IPC IPC(8): G01B11/16G01B11/00
CPCG01B11/16G01B11/002
Inventor 张宇捷王众保王璐都海伦苏园鹏马雪林夏康明
Owner CHANGZHOU ARCHITECTUAL RES INST GRP CO LTD