Method for solving intrinsic parameters of camera by circular motion in double-plane-mirror device

A technology of camera internal parameters and circular motion, applied in the field of computer vision research, can solve the problems of low cost, inaccurate results, complicated operation process, etc., and achieve the effect of simple production and low cost

Inactive Publication Date: 2014-12-10
YUNNAN UNIV
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Problems solved by technology

This method is low in cost, but requires precise positioning of the physical coordinates of the contour, and the operation process is complicated
The literature "Contour-based Structure from Reflection" (P.H. Huang and S.H

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  • Method for solving intrinsic parameters of camera by circular motion in double-plane-mirror device
  • Method for solving intrinsic parameters of camera by circular motion in double-plane-mirror device
  • Method for solving intrinsic parameters of camera by circular motion in double-plane-mirror device

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Embodiment

[0039] 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. The internal parameters of the camera are solved according to the circular motion corresponding to the reflection point group and the properties of the polar line. The spatial stereogram of object reflection imaging in the 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.

[0040] The experimental device used in the camera calibration method is two rectangular plane mirrors placed at a certain angle 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:

[0041] (1) Extract the feature points in the image to fit t...

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Abstract

The invention relates to a method for solving intrinsic parameters of a camera by circular motion in a double-plane-mirror device. The device is composed of two plane mirrors and a pinhole camera, and space points and reflection image points thereof in the plane mirrors are located on a same space circle. The method includes: shooting an object and three images of four reflection images of the object in the plane mirrors, extracting features points from the images, and fitting a curvilinear equation; acquiring an image of the circle center by the aid of symmetrical property of reflection point groups relative to the plane mirrors and tangential property of a curve at the feature points, and then utilizing relation among poles and polar lines to obtain a vanishing line on an image plane, namely an image of a line at infinity; acquiring an interaction of the vanishing line and the curve, namely an image of a circular point, creating six constraint equations of the image of the circular point relative to an absolute conic image, and linearly solving intrinsic parameters of the camera.

Description

technical field [0001] The invention belongs to the field of computer vision research and relates to a new method for solving internal parameters of a plane catadioptric camera. Take three images including the object and its four reflection images in the plane mirror, and use the symmetry of the reflection point group about the plane mirror and the tangent property of the curve at the feature point to linearly solve the internal parameters of the camera. Background technique [0002] In the field of computer vision, camera calibration refers to the process of obtaining camera parameters based on a given camera model. Starting from the two-dimensional image information obtained by the camera, the geometric information of the object in the three-dimensional space is restored, and the geometric shape of the object in the three-dimensional space is reconstructed according to the relationship between the three-dimensional geometric position of the spatial object and its correspon...

Claims

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Application Information

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IPC IPC(8): G06T7/00
Inventor 赵越张小芬
Owner YUNNAN UNIV
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