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Method for calibrating parabolic catadioptric camera through imaging of straight line

A catadioptric and camera technology, applied in the field of computer vision, can solve the problems of increasing the pre-operation, etc., to achieve the effect of speeding up the algorithm and simplifying the difficulty of calculation

Inactive Publication Date: 2018-04-24
YUNNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Method for calibrating parabolic catadioptric camera through imaging of straight line
  • Method for calibrating parabolic catadioptric camera through imaging of straight line
  • Method for calibrating parabolic catadioptric camera through imaging of 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 in the image, utilizes the function Edge in...

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Abstract

The invention relates to a method for calibrating a parabolic catadioptric camera through the imaging of a straight line, and the method is characterized in that the method employs the geometric relation between the projection of the straight line on a unit virtual globe in a unit virtual globe imaging model and the position of a mirror surface contour on the virtual globe. The method specificallycomprises the following steps: extracting a line image from an image and the pixel coordinates of image points on the mirror surface contour; carrying out the fitting of the image of the mirror surface contour according to the pixel coordinates of image points on the mirror surface contour, and solving an initial value of the internal parameters of the parabolic catadioptric camera; secondly solving antipodal image points corresponding to the line image and the pixel coordinates of image points on the mirror surface contour, i.e., the images of two end points on one diameter of the unit virtual globe; solving a vanishing point in an orthogonal direction through the attributes between the antipodal image points of the line image and the mirror surface contour, and solving the internal parameters of the parabolic catadioptric camera.

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 Applications(China)
IPC IPC(8): G06T7/80
CPCG06T2207/20068G06T7/85
Inventor 赵越宫明志
Owner YUNNAN UNIV
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