Method for solving camera inner parameters by using dot matrix template and orthogonality

A technology of camera internal parameters and lattice templates, which is applied in the field of computer research and can solve the problems of difficulty in making calibration blocks and inconvenient operation

Inactive Publication Date: 2013-02-13
YUNNAN UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the traditional camera calibration method can obtain high precision, it is difficult to make the calibration block and it is not easy to operate

Method used

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  • Method for solving camera inner parameters by using dot matrix template and orthogonality
  • Method for solving camera inner parameters by using dot matrix template and orthogonality
  • Method for solving camera inner parameters by using dot matrix template and orthogonality

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Embodiment

[0031] The invention proposes a method for solving the internal parameters of the camera by using the lattice template and the orthogonality. The experimental module adopted in the present invention consists of multiple figure 1 middle A, B, C, D Dot matrix composition. The implementation of the present invention will be described in more detail with an example below.

[0032] Specific steps are as follows:

[0033] The video camera used in the present invention is a CCD digital camera, and the image resolution is 1480×1240. We took 3 images at different orientations.

[0034] (1) Estimate the homography matrix between the template and the image

[0035] Give 9 points on the plane lattice template in the world coordinate system (including figure 1 point in A , B , C , D ) physical coordinates are as follows:

[0036] A (0,0,0), B (0,1,0), (0,2,0);

[0037] C (1,0,0), D (1,1,0), (1,2,0);

[0038] (2,0,0), (2,1,0), (2,2,0);

[0039] Use the function in the Ope...

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Abstract

The invention relates to a method for solving camera inner parameters by using a dot matrix template and orthogonality. The method comprises the following steps: firstly, taking out a physical coordinate of a dot matrix in a template; extracting a matching point in an image; estimating a homography matrix between the image and the template; supposing the slopes of two non-parallel and non-orthogonal straight lines in a template plane; calculating to obtain the slope of a straight slope orthogonal with the straight lines in the template plane; further calculating a coordinate of an in infinite point of the two groups of orthogonal straight lines; obtaining orthogonal end points through perspective projection transformation; shooting at least three images according to the relationship of the orthogonal end points and an absolute conic image so as to linearly solve the camera inner parameters. With the adoption of the template in the method, the full-automatic calibration can be implemented, and the measurement error in the calibration process is reduced.

Description

technical field [0001] The invention belongs to the field of computer research and relates to a plane lattice template for solving internal parameters of a camera. Use the plane lattice as the calibration template, estimate the homography matrix between the image and the template, set the slope of two non-orthogonal and non-parallel straight lines on the template plane, and calculate the slope of the straight line on the template plane orthogonal to it, using The homography matrix is ​​solved to obtain the vanishing points in the direction of these two sets of orthogonal straight lines, and the internal parameters of the camera are determined linearly. Background technique [0002] Camera calibration is of great significance in computer vision. It is the premise and basis for obtaining three-dimensional spatial information, and it is an important part of binocular vision research. Accurate calibration of camera internal parameters can not only directly improve measurement a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 赵越雷建冲
Owner YUNNAN UNIV
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