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Binocular vision measurement system camera parameter online adjustment method

A technology of binocular vision measurement and camera parameters, which is applied in measurement devices, image data processing, image analysis, etc., can solve the problems of orthogonality influence of high-precision motion platform, complex forging site environment, long calibration time, etc. It is used for online adjustment, high precision, and the effect of improving measurement accuracy.

Active Publication Date: 2014-04-09
DALIAN UNIV OF TECH
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Problems solved by technology

However, this method requires a high-precision motion platform, and the forging site environment is complex, which easily affects the orthogonality of the high-precision motion platform, and this method also has the problems of long calibration time and expensive equipment

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  • Binocular vision measurement system camera parameter online adjustment method
  • Binocular vision measurement system camera parameter online adjustment method
  • Binocular vision measurement system camera parameter online adjustment method

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Embodiment Construction

[0036] The specific implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings and technical solutions.

[0037] Camera calibration actually requires the internal parameter matrix K, the rotation and translation matrices R and T between the two cameras. A general camera model can be expressed as:

[0038]

[0039] Among them, (X w ,Y w ,Z w ,1) Tis the secondary coordinate of the space point in the world coordinate system, (x,y,1) T is the corresponding image point of the spatial point in the image coordinate system, f x , f y is the equivalent focal length of the camera, u 0 , v 0 is the coordinate of the principal point where the optical axis passes through the image plane, and z is the scaling factor.

[0040] Step 1: Make 4 camera parameter adjustment templates

[0041] Make 4 camera parameter adjustment templates, the camera parameter adjustment templates are as follows figure 2 As ...

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Abstract

The invention relates to a binocular vision measurement system camera parameter online adjustment method, belongs to the field of computer vision detection and image detection and particularly relates to a binocular vision measurement system camera parameter online adjustment method used for acquiring dimension parameters of a large forge piece in a forging site. The method comprises the following steps: four camera parameter adjustment templates are used, and images of the camera parameter adjustment templates are respectively taken by left and right cameras; then, orthogonal parallel lines in the camera parameter adjustment templates are identified and orthogonal vanishing points are obtained; next, internal parameters of the two cameras are calibrated; and finally, the external parameters of a binocular vision measurement system are simultaneously calibrated. Online adjustment on camera parameters of the binocular vision measurement system is realized, the accuracy of camera parameter calibration is improved, the measuring precision of the measuring system in the measuring process is improved, the method has the characteristics of lower time consumption in the calibration process and high precision, and camera parameter adjustment can be carried out in complicated working conditions.

Description

technical field [0001] The invention belongs to the field of computer vision detection and image detection, in particular to a method for online adjustment of camera parameters in a binocular vision measurement system used for obtaining size parameters of large forgings at a forging site. Background technique [0002] In the forging production process, it is necessary to measure the size of forgings in real time, so as to provide a basis for rationally controlling the entire forging process. The forging site conditions are extremely harsh, with high forging temperature, complex environment, and large vibrations, which make it difficult to measure the size of large forgings accurately and in real time. The measurement requires a large field of view, high accuracy, and online real-time measurement. As a non-contact measurement method with strong real-time performance and high measurement accuracy, binocular vision measurement is widely used in many fields such as industrial i...

Claims

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Application Information

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IPC IPC(8): G06T7/00G01B11/00
Inventor 贾振元刘巍杨景豪刘阳李明星张驰
Owner DALIAN UNIV OF TECH
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