Calibrating a catadioptric camera of a primer by using a single ball and a parallel circular tangent property

A technology of catadioptric and parallel circles, which is applied in the field of computer vision, can solve the problems of complex circle point selection, etc., and achieve the effects of simple production, improved calibration accuracy, and improved accuracy

Inactive Publication Date: 2019-02-12
YUNNAN UNIV
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the selection of the image of the...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Calibrating a catadioptric camera of a primer by using a single ball and a parallel circular tangent property
  • Calibrating a catadioptric camera of a primer by using a single ball and a parallel circular tangent property
  • Calibrating a catadioptric camera of a primer by using a single ball and a parallel circular tangent property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] The invention proposes a method for linearly determining internal parameters of a parabolic catadioptric camera by using a sphere in space as a target. The experimental template that the present invention adopts is as shown figure 1 The ball shown in . The implementation of the present invention will be described in more detail with an example below.

[0049] The experimental template used in the calibration of parabolic catadioptric cameras based on spheres in space is a sphere in space, such as figure 1 As shown, the ball is Q. Utilize the method among the present invention to carry out calibration for the parabolic catadioptric camera that is used for experiment, concrete steps are as follows:

[0050] 1. Fit image boundary and target curve equation

[0051] The image size used in the present invention is 690×1198. Use the parabolic catadioptric camera to shoot 3 experimental images of the target, read the images, use the Edge function in Matlab to extract the p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for calibrating a catadioptric camera of a primer by using a single ball and a parallel circular tangent property, which is characterized in that only the ball element is used; firstly, the edge points of specular contour projection and target image are extracted from three images respectively, and the specular contour projection and spherical image projection areobtained by least square fitting; secondly, according to the relationship between the image point and its extension point, the extension point is obtained, and then the extension spherical image of the spherical image is fitted; a point on the spherical image is taken and the topological point is found; by defining the topological points and the properties of parallel circles, the above set of topological points provides a vanishing point; in a parabolic catadioptric system, the sphere is projected onto the unit sphere for the first time to form two small parallel circles, two parallel circles on different faces have two pairs of conjugate imaginary intersection points, in which the two conjugate imaginary intersection points which are collinear with the infinity point of the plane in which the circle is located are ring points. Finally, the camera intrinsic parameters are obtained by using the constraint of the image of the torus point to the image of the absolute conic curve.

Description

technical field [0001] The invention belongs to the field of computer vision and relates to a method for solving the internal parameters of a parabolic catadioptric camera by using the properties of a sphere and a parallel circle tangent in space. Background technique [0002] The central task of computer vision is to understand images, and its ultimate goal is to enable computers to have the ability to recognize three-dimensional environmental information through two-dimensional images. This ability will not only enable the machine to perceive the geometric information of objects in a three-dimensional environment including shape, posture, motion, etc., but also describe, store, recognize and understand them. Camera calibration is to determine the mapping relationship from a three-dimensional space point to its two-dimensional image point, which is an essential step in many computer vision applications. In order to determine this mapping process, it is necessary to establi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06T7/80G06F17/16
CPCG06F17/16G06T7/80
Inventor 李远珍赵越
Owner YUNNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap