Three-line structured light-based camera plane calibration method

A calibration method and structured light technology, applied in image data processing, instruments, calculations, etc., can solve problems such as low calibration accuracy, inability to obtain camera distortion models, and difficulty in completely eliminating camera distortion errors, so as to improve accuracy and reduce artificial Interfere, reduce workload

Inactive Publication Date: 2017-10-03
SHANGHAI UNIV OF ENG SCI
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AI Technical Summary

Problems solved by technology

The traditional camera calibration method cannot obtain an accurate camera distortion model, the calibration accuracy is low, and it is difficult to completely eliminate the camera distortion error

Method used

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  • Three-line structured light-based camera plane calibration method
  • Three-line structured light-based camera plane calibration method
  • Three-line structured light-based camera plane calibration method

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Embodiment Construction

[0046] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0047] Such as figure 1 As shown, this embodiment provides a camera plane calibration method based on three-line structured light, which specifically includes the following steps:

[0048] s1) Establish a three-line structure cursor calibration platform, and photograph the checkerboard calibration template 1 in the three-line structure cursor calibration platform;

[0049] s2) Carry out Harris corner detection to the image taken in step s1), obtain the distortion model of camera;

[0050] s3) Carry out coordinate transformation on the distortion model of the camera according to the ...

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Abstract

The invention relates to a three-line structured light-based camera plane calibration method. The method comprises the following steps that a three-line structured light calibration platform is built, and a checkerboard calibration template is shot in the three-line structured light calibration platform; Harris corner detection is conducted on the shot image to obtain a distortion model of a camera; coordinate transformation is conducted on the distortion model of the camera according to a BP neural network to obtain a camera model obtained after correction in a world coordinate system; and the camera model obtained after correction is calibrated according to a Zhang Zhengyou plane calibration method. Compared with the prior art, the method has the advantages of being high in calibration precision and calibration speed, easy to operate and implement and the like.

Description

technical field [0001] The invention relates to the field of camera calibration, in particular to a camera plane calibration method based on three-line structured light. Background technique [0002] Camera calibration technology is one of the key technologies for line structured light 3D measurement. In the image measurement process and machine vision applications, in order to determine the relationship between the three-dimensional geometric position of a point on the surface of a space object and its corresponding point in the image, it is necessary to establish a geometric model of camera imaging, and these geometric model parameters are camera parameters. Under most conditions, these parameters must be obtained through experiments and calculations. This process of solving parameters is called camera calibration (or camera calibration). Whether it is in image measurement or machine vision applications, the calibration of camera parameters is a very critical link. The ac...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80G06T5/00G06T7/13
CPCG06T5/006G06T7/13G06T7/80G06T2207/10141G06T2207/20004G06T2207/20081G06T2207/20084
Inventor 吴芳茅健罗翔勇张淑杰范红平秦伟李情
Owner SHANGHAI UNIV OF ENG SCI
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