A high-precision calibration plate for camera parameter calibration and its manufacturing method

A production method and camera parameter technology, applied in the field of measurement and control, can solve the problems of small calibration plate size and low point position accuracy, and achieve the effect of improving measurement accuracy

Active Publication Date: 2016-11-23
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low point accuracy and small size of the calibration plate in the prior art, and propose a high-precision calibration plate for camera parameter calibration and its manufacturing method

Method used

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  • A high-precision calibration plate for camera parameter calibration and its manufacturing method
  • A high-precision calibration plate for camera parameter calibration and its manufacturing method
  • A high-precision calibration plate for camera parameter calibration and its manufacturing method

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Embodiment Construction

[0034] A high-precision calibration plate for camera parameter calibration of the present invention and its manufacturing method are introduced below in conjunction with the accompanying drawings and embodiments:

[0035] like figure 1 , 2 As shown, a high-precision calibration plate used for camera parameter calibration includes a calibration plate substrate 1, marking points 2 and ribs 3, the calibration plate substrate 1 is a square metal thin plate, and duralumin is the best. Marking points 2 are uniformly arranged on the front of the calibration plate substrate 1 to form an array of marking points. The distance between the geometric centers of adjacent marking points 2 is selected according to actual needs. The accuracy of the distance between the geometric centers of adjacent marking points 2 is within the range of ±0.02mm. 2 Roundness φ0.01mm. A reinforcing rib 3 is installed on the back side of the calibration plate substrate, and the material of the reinforcing rib ...

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Abstract

The invention belongs to the field of measurement and control technology, in particular, relates to a high-precision calibration plate for camera parameter calibration and a manufacturing method thereof, and aims to solve the problems that the point position precision is not high and the calibration plate size is smaller in the prior art. The calibration plate comprises a calibration plate basic plate (1), mark points (2) and reinforcing ribs (3); the calibration plate basic plate (1) is a square metal-prepared thin plate, the front side of the calibration plate basic plate (1) is uniformly provided with the mark points (2) so as to form a mark point (2) array, and the back face of the calibration plate basic plate is provided with the reinforcing ribs (3). The manufacturing method comprises the six steps of datum face processing, blind-hole array processing, stabilizing treatment, fashioning after stabilizing, filled cylinder processing and corrosion treatment. The calibration plate manufactured by the manufacturing method calibrates camera parameters; and compared with calibration results of a calibration plate processed by a plastic spraying method, a re-projection error of the former one is 0.18 pix, a re-projection error of the latter one is 0.58 pix, and the calibration accuracy of the former one is increased by more than 3 times.

Description

technical field [0001] The invention belongs to the technical field of measurement and control, and in particular relates to a high-precision calibration plate used for camera parameter calibration and a manufacturing method thereof. Background technique [0002] In the field of machine vision and photogrammetry, the main equipment to complete the measurement task is the camera, and accurate calibration of its parameters is the prerequisite for the completion of the measurement task. The camera calibration model based on the planar calibration board has the advantages of good portability, simple calibration process, and on-site calibration. Therefore, the camera calibration technology based on the planar calibration board has attracted more and more attention and has been widely used. [0003] At present, the calibration boards used for camera parameter calibration mainly have the following production methods: paper printing; glass coating; plastic inkjet painting; liquid cr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 宋金城梁雅军刘柯孙增玉
Owner BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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