A method of calibrating a parabolic catadioptric camera using the imaging of a straight line

A catadioptric, camera technology, applied in the field of computer vision, can solve problems such as increasing pre-operation

Inactive Publication Date: 2021-06-08
YUNNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method proposes to correspond to the image point to expand the image point, which opens up a new situation for camera calibration, but requires three images of a straight line at different positions, which increases the pre-operation

Method used

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  • A method of calibrating a parabolic catadioptric camera using the imaging of a straight line
  • A method of calibrating a parabolic catadioptric camera using the imaging of a straight line
  • A method of calibrating a parabolic catadioptric camera using the imaging of a straight line

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Embodiment

[0048] The invention proposes a method for solving internal parameters of a parabolic catadioptric camera by using a space straight line l as a target. The schematic diagram of the target structure used in the present invention is as follows figure 1 shown. The embodiment of the present invention will be described in detail below with an example.

[0049] Calculating the internal parameters of the parabolic catadioptric camera based on a straight line in space uses a straight line l in space, such as figure 1 shown. Utilize the method among the present invention to solve parabolic catadioptric camera internal parameter for experimenting with parabolic catadioptric camera, concrete steps are as follows:

[0050] 1. Extract the contour image points and determine the initial value of the internal parameters

[0051] The present invention uses a parabolic catadioptric camera to shoot 1 image containing a straight line in space, reads the image, utilizes the function Edge in Ma...

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Abstract

The invention relates to a method for calibrating a parabolic catadioptric camera by imaging a straight line, which is characterized in that the geometry between the projection of the straight line on the unit sight sphere and the position of the mirror profile on the unit sight sphere in the unit sight sphere imaging model is used. connect. The specific steps of the method include: firstly, extracting the pixel coordinates of the image points of the line image and the mirror surface contour from the image. Secondly, according to the pixel coordinates of the image points on the image of the mirror profile, the image of the mirror profile is fitted, and the initial value of the internal parameters of the parabolic catadioptric camera is solved. Then, obtain the image points corresponding to the on-image points of the line image and the mirror surface contour, that is, the images of the two endpoints on one diameter of the unit viewing sphere. Finally, the vanishing points in the orthogonal direction are solved by using the properties between the image extension points of the line image and the mirror profile, and then the internal parameters of the parabolic catadioptric camera are solved.

Description

technical field [0001] The invention belongs to the field of computer vision and relates to a method for calculating internal parameters of a parabolic catadioptric camera by using the geometric properties of a straight line and its projection on a unit viewing sphere. Background technique [0002] Computer vision is an emerging discipline in recent years. It uses computers to simulate human vision, specifically, to use cameras to simulate human eyes to obtain images, and to use computers to simulate human brains to process and analyze images. The main purpose of computer vision is to develop a computer with a visual ability comparable to that of a human, so that the computer can observe and understand the world through vision like a human, and then can autonomously adapt to the surrounding environment. With the development of the field of computer vision, due to the small imaging field of view of traditional cameras, a catadioptric camera realized by combining traditional c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/80
CPCG06T2207/20068G06T7/85
Inventor 赵越宫明志
Owner YUNNAN UNIV
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