Intelligent calibration method for internal and external parameters of binocular camera based on coding plane target

A binocular camera and planar target technology, which is applied in image data processing, image analysis, image enhancement, etc., can solve the problem that the planar target cannot be photographed, the calibration process is inflexible, and the rotation direction of the planar target without direction information cannot be judged, etc. question
CN113129386AActive Publication Date: 2021-07-16HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2021-07-16

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Abstract

The invention discloses an intelligent calibration method for internal and external parameters of a binocular camera based on a coding plane target, and the method comprises the steps: employing two cameras to shoot coding plane targets in different attitudes in a space at the same time, and obtaining a plurality of coding plane target images; respectively obtaining a sub-pixel-level coordinate, a unique coding sequence number and a target coordinate of each calibration angular point in the coding plane target image by using a coding plane target decoding method; obtaining G1 left camera calibration images and G2 right camera calibration images according to a set threshold value of the number of calibration angular points and a space attitude threshold value of the coding plane target; and respectively solving internal and external parameters of the two cameras and a rotation and translation relation between the left camera and the right camera. According to the invention, the automatic calibration of the binocular camera can be realized, the calibration of the binocular camera can be completed by fully utilizing the local coding plane target image when the calibration is limited by the range of a public view field, and the applicability and robustness of the calibration of the multi-camera are improved.
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Description

technical field

[0001] The invention relates to the field of camera calibration in the field of computer vision, in particular to an intelligent calibration method for internal and external parameters of a binocular camera based on a coded plane target. Background technique

[0002] Computer vision technology is widely used in industrial control, metrology and other fields. Computer vision technology mainly uses camera imaging to obtain three-dimensional information of the measured object in space through image information, thereby reconstructing and identifying the object. The fundamental problem of computer vision technology is camera calibration. The mapping relationship between three-dimensional coordinates of space and two-dimensional coordinates of images can be obtained through camera calibration technology. Camera calibration technology is the research focus of computer vision measurement technology. The task of camera calibration is to solve the Internal and externa...

Claims

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