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Camera calibration system and method

A camera calibration and camera technology, applied in image data processing, instruments, calculations, etc., can solve the problems of increasing target production costs, time-consuming and laborious, etc.

Active Publication Date: 2020-04-28
SICHUAN VISENSING TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In the general calibration method, it is not only necessary to collect multiple images, so it is necessary to manually move the calibration plate or the camera, and the distance between the target and the camera also needs to meet the working distance of the camera during calibration. In practical applications, It is not only time-consuming and laborious, but also increases the production cost of the target

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  • Camera calibration system and method
  • Camera calibration system and method

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Embodiment Construction

[0019] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0020] Camera calibration is one of the key technologies in machine vision, photogrammetry, 3D imaging, and image geometry correction. Its main function is to estimate the internal and external parameters of the camera. The accuracy of the calibration results and the stability of the calibration algorithm directly affect the accuracy of subsequent work. A general perspective camera can be represented by a pinhole model, and can be calibrated using perspective projection mapping and affine transformation.

[0021] The method that has been researched and matured at present is to use a planar target, and there are tool software based on the planar target, such as: Matlab t...

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Abstract

The invention discloses a camera calibration system and method. The system comprises a three-dimensional target, a teleconverter, a camera and an electronic device, the teleconverter is arranged between the camera and the three-dimensional target, the camera is electrically connected with the electronic device, and the three-dimensional target comprises a plurality of stepped targets and mark points arranged on the stepped targets; the camera is used for shooting a virtual target formed after the three-dimensional target is amplified by the teleconverter to obtain a target image, and the target image comprises mark points arranged on each stepped target in the virtual target; and the electronic device is used for calibrating the camera according to the target image. The size of the targetand the distance between the target and the camera are controlled, the three-dimensional target or the camera does not need to be moved to collect multiple target images, and rapid and high-precisioncalibration of the camera is completed by only collecting one target image while the calibration difficulty of the camera is reduced.

Description

technical field [0001] The present application relates to the technical field of camera calibration, and more particularly, to a camera calibration system and method. Background technique [0002] Camera calibration is one of the key technologies in machine vision, photogrammetry, 3D imaging, and image geometry correction. Its main function is to estimate the internal and external parameters of the camera. The accuracy of the calibration results and the stability of the calibration algorithm directly affect the accuracy of subsequent work. In the general calibration method, it is not only necessary to collect multiple images, so it is necessary to manually move the calibration plate or the camera, and the distance between the target and the camera also needs to meet the working distance of the camera during calibration. In practical applications, It is not only time-consuming and laborious, but also increases the production cost of the target. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80G06T7/62
CPCG06T7/80G06T7/62Y02T10/40
Inventor 苏显渝
Owner SICHUAN VISENSING TECH CO LTD
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