Image measurement method and system

一种图像测量、二维图像的技术，应用在测量领域，能够解决不适用、标定过程费时费力、无法人工测量等问题，达到标定过程快速、消除变换失真效应的效果

Active Publication Date: 2018-09-18
JINQIANMAO TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the calibration process is time-consuming and laborious, and it is not suitable for online calibration and occasions where manual measurement or calibration templates cannot be used

Method used

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  • Image measurement method and system
  • Image measurement method and system

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Embodiment Construction

[0028] In order to describe the technical content, achieved goals and effects of the present invention in detail, the following descriptions will be made in conjunction with the embodiments and accompanying drawings.

[0029] Please refer to figure 1 , a kind of image measurement method based on laser provided by the invention, comprises steps:

[0030] S1. Preset the initial position of the camera, rotate the camera so that the shooting area is located in the display area of ​​the camera, and obtain the rotation angle value of the camera;

[0031] S2. Adjust the direction of the laser beam emitted by the laser set on the camera, so that the laser point located in the shooting area is located in the center of the display area of ​​the camera, and a two-dimensional image is obtained by shooting;

[0032] S3. Obtain the ranging distance from the camera to the shooting area according to the laser, and calculate the translation value of the camera;

[0033] S4. Obtain the preset...

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Abstract

The invention relates to the field of measurement, and especially relates to an image measurement method, system and device. The method comprises the steps: presetting the initial position of a camera, and rotating the camera so as to enable a shooting area to be located in a display area of the camera, and obtaining a rotation angle value of the camera; adjusting the direction of a laser beam emitted by a laser disposed on the camera, enabling a laser point located in the shooting area to be located at the center of the display area of the camera, and capturing a two-dimensional image throughshooting; calculating and obtaining a translation value of the camera according to the distance, obtained by the laser, from the camera to the shooting area; obtaining the preset internal parametersof the camera, calculating and obtaining the mapping relationship between the two-dimensional image of the shooting area and a three-dimensional world space according to the rotation angle value of the camera, the translation value of the camera and the internal parameters of the camera; obtaining the coordinate values of a to-be-tested object on the two-dimensional image, substituting the coordinate values into the mapping relationship between the two-dimensional image and the three-dimensional world space, and calculating and obtaining a measured value of the to-be-tested object in the three-dimensional world space.

Description

[0001] This case is a divisional application based on the invention patent with the application date of May 18, 2017, the application number 201710353553.9, and the title of "a laser-based image measurement method, system and device". technical field [0002] The invention relates to the field of measurement, in particular to a laser-based image measurement method, system and device. Background technique [0003] With the development of science and technology, measurement methods have also changed. Traditional measurement methods require manual running points, low efficiency, poor accuracy, and long time. Using new measurement methods such as ultrasonic waves and lasers, for the measurement of different targets, different laser positioning operations and calculations are required manually, with large errors and cumbersome steps. Moreover, for construction sites that need to detect construction site materials (such as steel bars, etc.), due to the large number of site materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01C11/00
CPCG01B11/00G01B11/002G01C11/00G06T7/80
Inventor 林大甲黄宗荣郑敏忠江世松刘兵
Owner JINQIANMAO TECH CO LTD
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