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Design and detection method of camera calibration board

A technology of camera calibration and detection method, applied in the directions of calculation, image analysis, image data processing, etc., can solve the problems of inability to capture calibration plate images, small imaging, affecting the accuracy of corresponding points, etc.

Inactive Publication Date: 2014-12-17
太仓中科信息技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2) When the shooting angle of the calibration plate is too large, the pattern on the peripheral edge of the calibration plate is small and blurred in the image, which affects the accuracy of the corresponding points;
[0006]3) For the calibration of telephoto lenses, the inability to capture a complete calibration plate image is also a problem encountered in traditional calibration methods

Method used

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  • Design and detection method of camera calibration board
  • Design and detection method of camera calibration board
  • Design and detection method of camera calibration board

Examples

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Effect test

Embodiment 1

[0053] A design and detection method of a camera calibration board, comprising the following steps (such as Image 6 shown):

[0054] S1: The overall layout and design of the calibration board;

[0055] S2: measure and save the calibration plate information;

[0056] S3: Camera calibration.

[0057] Further, the step S1 specifically includes the following steps:

[0058] S11: Determine the length and area of ​​the calibration board according to the actual needs, so as to ensure that the peripheral edge of the calibration board has enough coding patterns to be clearly imaged when shooting at a large angle;

[0059] S12: Design non-repetitive coding patterns of different sizes to ensure that when calibrating the telephoto lens, there is always a coding pattern of a suitable size that can be recognized when calibrating various zoom ring positions of the camera lens;

[0060] S13: Layout the coding pattern into the calibration board.

[0061] Further, in the step S1, by mecha...

Embodiment 2

[0089] A design and detection method of a camera calibration board, comprising the following steps (such as Image 6 shown):

[0090] S1: The overall layout and design of the calibration board;

[0091] S2: measure and save the calibration plate information;

[0092] S3: Camera calibration.

[0093] Further, the step S1 specifically includes the following steps:

[0094] S11: Determine the length and area of ​​the calibration board according to the actual needs, so as to ensure that the peripheral edge of the calibration board has enough coding patterns to be clearly imaged when shooting at a large angle;

[0095] S12: Design non-repetitive coding patterns of different sizes to ensure that when calibrating the telephoto lens, there is always a coding pattern of a suitable size that can be recognized when calibrating various zoom ring positions of the camera lens;

[0096] S13: Layout the coding pattern into the calibration board.

[0097] Further, in the step S1, by mecha...

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Abstract

The invention discloses a design and detection method of a camera calibration board. The design and detection method comprises the following steps: carrying out integral layout and design of the calibration board; measuring and storing calibration board information; and carrying out camera calibration. Firstly, the gesture of the calibration board is automatically transformed by a machine to avoid work of artificially frequently regulating the calibration board and realize the automatic camera calibration; secondly, during big-angle shooting, the peripheral edge of the calibration board is provided with enough coding patterns which can be clearly imaged; and finally, when a telephoto lens is calibrated, the coding patterns with a proper size always can be calibrated on various zoom ring positions which aim at a camera lens so as to be identified.

Description

technical field [0001] The invention relates to a lens calibration device and a calibration method, in particular to an automatic zoom lens calibration device and a calibration method. Background technique [0002] The camera calibration technology is to link the world coordinates with the image coordinates through the calibration board, and calculate the internal and external parameters of the camera according to the corresponding relationship. Especially through calibration technology, obtaining the functional relationship among focus, focal length, and lens distortion is the basis of virtual special effects shooting technology. [0003] In applications, a checkerboard or dot calibration board is often used to complete the camera calibration process. The use of the calibration board is often: by shooting multiple checkerboard or dot calibration board images under different postures, and according to the coordinates of the corresponding points in the image coordinate syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 顾益魏毅周晴冯兵周晨诚
Owner 太仓中科信息技术研究院
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