Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Common self-polar triangle and orthogonal vanishing point calibration parabolic camera for a single sphere

A technique of vanishing point and triangle, applied in the field of computer vision, to achieve the effect of improving calibration accuracy, improving accuracy and making production simple

Inactive Publication Date: 2019-02-19
YUNNAN UNIV
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Parabolic camera, also known as parabolic catadioptric camera

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
  • Common self-polar triangle and orthogonal vanishing point calibration parabolic camera for a single sphere
  • Common self-polar triangle and orthogonal vanishing point calibration parabolic camera for a single sphere
  • Common self-polar triangle and orthogonal vanishing point calibration parabolic camera for a single sphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0056] The invention proposes a method for linearly determining the parameters of a parabolic camera by using a space ball as a target. The following describes the implementation of the present invention in more detail with an example.

[0057] The experimental template used in the calibration of the parabolic camera based on the ball in space is the ball in space, such as figure 1 As shown, using the method in the present invention to calibrate the parabolic camera, the specific steps are as follows:

[0058] 1. Fit the image boundary and target curve equation

[0059] The image size used in the present invention is 1038×1048. Shoot 6 experimental images of the target with a parabolic camera, read in the images, use the Edge function in Matlab to extract the pixel coordinates of the edge points of the target image and the edge point of the mirror profile projection, and use the least squares method to fit the mirror profile projection equation and spherical image The equation and ...

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 parabolic camera by using a common self-polar triangle and an orthogonal vanishing point of a single sphere. Firstly, the edge points of spherical image and the edge points of specular contour projection are extracted from this image respectively. According to the fact that any two separate spherical images have a unique common self-polar triangle, a set of poles and poles corresponding to the spherical image and its extension can be obtained. At the same time, this polar line is an image of the center of the two spheres, and this pole is a vanishing point. The vanishing point has a polar line on the ball image; A polar line passes through the image of the center of a sphere and intersects the image of the sphere at two points. The imageof the center of the sphere and the vanishing point can be obtained by using the image of the intersection point and the center of the sphere and the property of harmonic conjugate of the vanishing point in the direction of the polar line. The two vanishing points are a set of orthogonal vanishing points. Then six sets of orthogonal vanishing points can be obtained from six images, and the intrinsic parameters of the parabolic camera can be obtained by using the constraint of the orthogonal vanishing points and the image of the absolute conic.

Description

Technical field [0001] The invention belongs to the field of computer vision and relates to a method for solving the parameters of a parabolic camera by using the image of the common self-polar triangle and the orthogonal vanishing point of the spherical image in space. The parabolic camera is also called the parabolic catadioptric camera. Background technique [0002] The central task of computer vision is to understand images, and its ultimate goal is to make computers 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 the three-dimensional environment including shape, posture, movement, etc., but also to 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. It is an indispensable step for many computer...

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): G06T7/80
CPCG06T7/80
Inventor 赵越汪雪纯杨丰澧
Owner YUNNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com