Industrial fixed-focus camera parameter calibration device based on square target model

A square target model and parameter calibration technology, applied in image data processing, instruments, calculations, etc., can solve the problems of immature image processing technology, large manual operation errors, cumbersome process, etc., to simplify the camera calibration process and cost, and facilitate Camera parameters, low-cost effects

Active Publication Date: 2014-02-05
TONGJI UNIV
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Problems solved by technology

[0005] For the first calibration method, although the size of the calibration object is accurate, the external parameters of the camera relative to the calibration object cannot be accurately measured, so the first method needs to collect multiple high-quality calibration images to optimize the solution of internal parameters , this method has large manual operation errors, cumbersome process, and complex algorithm, and accurate results can only be obtained when calibration is repeated many times
The second method has no external reference object and is very flexible to use, but the image processing technology is not mature, and there are too many unknown parameters, it is difficult to obtain stable and accurate calculation results
The calibration method needs to be realized by a specific device. Therefore, there is a lack of a simple device and operation method dedicated to camera parameter calibration.

Method used

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  • Industrial fixed-focus camera parameter calibration device based on square target model
  • Industrial fixed-focus camera parameter calibration device based on square target model
  • Industrial fixed-focus camera parameter calibration device based on square target model

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Such as image 3 As shown, an industrial fixed-focus camera parameter calibration device based on a square target model includes a target 1, a camera translational movement assembly and a PC 6, and the target 1 and the camera translational movement assembly are arranged on the ground at a certain distance. The camera 2 to be calibrated is set on the camera translation movement assembly, and is connected with the PC 6 through the data line 7, as figure 2 As shown, the target 1 is provided with four dots, and the geometric centers of the four dots form a square. A square object will become an arbitrary quadrilateral after projection on the imaging surface of the camera. Through projection transformation adjustment, a square similar to the original object can be easily obtained again, and the position of the square at this time is paral...

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Abstract

The invention relates to an industrial fixed-focus camera parameter calibration device based on a square target model. The industrial fixed-focus camera parameter calibration device based on the square target model comprises a target, a camera translational motion component and a PC, wherein the target and the camera translational motion component are arranged on the ground in a spaced mode, a camera to be calibrated is arranged on the camera translational motion component and is connected with the PC, four dots are arranged on the target, and the geometric centers of the four dots form a square. Compared with the prior art, the industrial fixed-focus camera parameter calibration device based on the square target model has the advantages of being simple, easy to use, high in calculation speed, high in accuracy and the like.

Description

technical field [0001] The invention relates to the technical field of industrial fixed-focus camera calibration, in particular to an industrial fixed-focus camera parameter calibration device based on a square target model. Background technique [0002] Camera calibration is to determine the attribute parameters, spatial position and imaging model of the camera, so as to determine the correspondence between the object in the spatial coordinate system and its image point on the image plane, so that the camera can accurately measure the external The process of object geometry data. [0003] Industrial fixed-focus cameras cannot be directly applied to photogrammetry because the parameters are unknown. Generally, various calibration techniques can be used to obtain camera parameters, and then physical and mathematical models can be established for analytical calculation of space photogrammetry. The parameters of the camera are mainly the projection magnification that has a cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 袁勇艾青王辉郭凤迪
Owner TONGJI UNIV
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