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Method for solving internal parameters of planar catadioptric video camera according to property of orthogonal vanishing point

A technology of camera internal parameters and vanishing points, applied in the field of computer vision research, can solve problems such as inaccurate results

Inactive Publication Date: 2014-12-03
YUNNAN UNIV
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Problems solved by technology

The literature "Huang Po-Hao, Lai Shang-Hon, Contour-based Structure from Reflection, Computer Vision and Pattern Recognition, 2006 IEEE Computer Society Conference on. Vol. 1. IEEE, 2006." uses a complete perspective camera model, in the calibration In the process, it is necessary to estimate the size of the focal length first, which makes the result inaccurate

Method used

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  • Method for solving internal parameters of planar catadioptric video camera according to property of orthogonal vanishing point
  • Method for solving internal parameters of planar catadioptric video camera according to property of orthogonal vanishing point
  • Method for solving internal parameters of planar catadioptric video camera according to property of orthogonal vanishing point

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Embodiment

[0035] The invention proposes to use any two rectangular plane mirrors placed at a certain angle in space, and the object forms four virtual images in the double plane mirror device due to the internal reflection between the two real plane mirrors. According to the symmetry of the reflection point group with respect to the plane mirror and the properties of the harmonic conjugate, the internal parameters of the camera are solved linearly. The imaging of a spatial point in a double plane mirror device is as follows figure 1 As shown, an example is used below to describe the embodiment of the present invention in more detail.

[0036] The experimental device used in the camera calibration method is any two rectangular plane mirrors in space, such as figure 1 Shown, utilize the method among the present invention to carry out calibration for the video camera of experiment, concrete steps are as follows:

[0037] (1) Extract feature points in the image

[0038] The image resolut...

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Abstract

The invention relates to a method for solving internal parameters of a planar catadioptric video camera according to property of an orthogonal vanishing point. The video camera consists of two plane mirrors and a pinhole video camera, wherein the two plane mirrors are perpendicular to a plane formed by bottom edges of the two plane mirrors. An object and three images formed through four-time catoptric imaging of the object in the plane mirrors are shot, and feature points are extracted from the images. The orthogonal vanishing points are solved by utilizing symmetry of a reflection point set relative to the plane mirrors and the harmonic conjugate property, a constraint equation of the orthogonal vanishing point with respect to an absolute conic image is established, and the internal parameters of the planar catadioptric video camera are linearly solved.

Description

technical field [0001] The invention belongs to the field of computer vision research, and relates to a new method for solving the internal parameters of the camera. Using the particularity of the imaging of two plane mirrors forming a certain angle, the absolute two-dimensional The constraint equation of the subcurve image linearly determines the internal parameters of the camera. Background technique [0002] The research goal of computer vision is to enable the computer to have the ability to recognize three-dimensional environment information through two-dimensional images. One of the basic tasks of computer vision is to recover the geometric information of objects in three-dimensional space from the two-dimensional image information obtained by the camera, so that Identify and reconstruct the geometry of objects in 3D space. In this process, the relationship between the three-dimensional geometric position of the spatial object point and its corresponding point in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 赵越张小芬
Owner YUNNAN UNIV
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