Multi-camera large-view-field surface shape measurement and calibration method

A technology of surface shape and calibration method, which is applied in the directions of measuring devices, image data processing, instruments, etc.

Active Publication Date: 2021-04-16
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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However, this multi-camera system brings more cal

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  • Multi-camera large-view-field surface shape measurement and calibration method
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  • Multi-camera large-view-field surface shape measurement and calibration method

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[0072] In order to make the purpose, features and advantages of the present invention understandable, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0073] like figure 1 As shown, the line structured light measurement system is mainly composed of 4 industrial cameras, a line laser, the steel plate to be tested, the steel plate conveying roller table, an industrial computer and related software. by figure 1 A line structured light measurement system to specifically describe a multi-camera large field of view surface shape measurement and calibration method of the present invention;

[0074] Symbol Description: Represents the pixel homogeneous coordinates, A represents the internal parameter matrix of the camera, [R t] represents the external parameters of the camera, is the homogeneous coordinate of the world coordinates, is the camera coordinate system coordinates, O C is t...

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Abstract

The invention belongs to the field of multi-camera calibration and measurement, and particularly relates to a multi-camera large-field-of-view surface shape measurement and calibration method, which mainly utilizes a characteristic line and a characteristic surface of a laser line to calibrate a single-camera structured light measurement system, and then rotates and translates a calibration camera coordinate system according to the uniqueness of a light plane. The attitude of the multi-camera system is unified to the attitude of a standard coordinate system, the coordinate translation relationship between adjacent cameras is obtained by calculating the coordinate values of the same feature points in the same view of the adjacent cameras, and the multi-camera system is mapped to the reference coordinates, so that wide-range and large-view-field three-dimensional topography measurement is realized, and more calibration problems caused by installation errors and the like of a multi-camera structured light measurement system are mainly solved.

Description

technical field [0001] The invention belongs to the field of multi-camera calibration measurement, in particular to a multi-camera surface shape measurement calibration method with a large field of view. Background technique [0002] With the development of modern science and technology, the application of machine vision is becoming more and more extensive, and it has gradually developed into an indispensable detection method in intelligent equipment. Among them, the line-structured light measurement system composed of vision and laser has the main characteristics of simple structure, high efficiency, and non-contact measurement. It has broad application prospects in the fields of 3D reconstruction and 3D surface shape measurement. A line structured light measurement system generally consists of a camera, a line laser, an industrial computer and related algorithms. Its measurement principle mainly collects the deformation data of the laser line hitting the surface of the ob...

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Application Information

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IPC IPC(8): G01B11/16G06T7/00G06T7/62G06T7/80
Inventor 李子良马立峰黄庆学王涛江连运胡鹰
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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