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

Irregular coelonavigation sight line information extracting method

A technology for celestial navigation and information extraction, applied in celestial navigation, navigation calculation tools, etc., can solve problems such as centroid deviation of small celestial bodies

Active Publication Date: 2016-05-04
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of centroid deviation of small celestial bodies in the existing small celestial body navigation line of sight information extraction method, and propose a method for extracting irregular celestial body navigation line of sight information

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
  • Irregular coelonavigation sight line information extracting method
  • Irregular coelonavigation sight line information extracting method
  • Irregular coelonavigation sight line information extracting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A method for extracting irregular celestial body navigation line-of-sight information, realizing the method of this embodiment includes the following steps, such as figure 1 Shown:

[0062] Step 1. Extract the edge contour of the target small celestial body in the navigation image

[0063] According to the preprocessed target small celestial body image, the edge contour of the target small celestial body is detected and extracted. The Canny detection algorithm is used to detect the edge of the target star, and the specific detection process is as follows:

[0064] (1) Smooth the image with a Gaussian filter with a specified standard deviation σ.

[0065] The Gaussian equation has the form Using the convolution operation to get

[0066] S(i,j)=G(i,j)*I(i,j)(12)

[0067] Where * represents the convolution operator, and I(i,j) is the gray value of the (i,j)th pixel.

[0068] (2) Calculate the gradient magnitude and direction of each point in the image.

[0069] The...

Embodiment 2

[0104] A method for extracting irregular celestial body navigation line-of-sight information, realizing the method of this embodiment includes the following steps, such as figure 1 Shown:

[0105] Step 1. Extract the edge contour of the target small celestial body in the navigation image

[0106] According to the preprocessed target small celestial body image, the edge contour of the target small celestial body is detected and extracted. The Canny detection algorithm is used to detect the edge of the target star, and the specific detection process is as follows:

[0107] (1) Smooth the image with a Gaussian filter with a specified standard deviation σ.

[0108] The Gaussian equation has the form Using the convolution operation to get

[0109] S(i,j)=G(i,j)*I(i,j)

[0110] Where * represents the convolution operator, and I(i,j) is the gray value of the (i,j)th pixel.

[0111] (2) Calculate the gradient magnitude and direction of each point in the image.

[0112] The fin...

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 an irregular coelonavigation sight line information extracting method, in particular to a small celestial body detection and navigation sight line information extracting method, and belongs to the field of small celestial body detection. The method mainly comprises the steps that 1, the edge contour of a small target celestial body in a navigation image is extracted; 2, a self-adaption method is used for removing false edge information; 3, the small celestial body edge contour obtained after the false edge information is removed is subjected to ellipse fitting; 4, the sight line information of the small target celestial body is extracted according to the ellipse fitting result. The influence of illumination, the camera shooting angle and spinning of the small target celestial body on the method is small, the precision and stability of small celestial body navigation sight line information extraction can be effectively improved, no precise shape model is needed, and the application range is wide. According to the self-adaption false edge removing method, the light and shade boundary of the small target celestial body and the false edge information caused by small celestial body surface terrain shading can be effectively removed, and the precision and reliability of ellipse fitting and sight line information extraction are guaranteed.

Description

technical field [0001] The invention relates to a method for extracting irregular celestial body navigation sight information, in particular to a method for extracting small celestial body detection navigation sight information, which belongs to the field of small celestial body detection. Background technique [0002] The target star for small celestial body detection is generally far away from the earth, and the communication delay with the earth is relatively large, which brings great challenges to the traditional ground-based "deep space network" navigation method. Especially in key mission stages such as small celestial body rendezvous, flyby, impact, and landing, the navigation method based on the deep space network cannot meet the real-time and accuracy requirements of the mission, and autonomous navigation has become an indispensable navigation method. [0003] Optical navigation is one of the main autonomous navigation methods for small celestial body detection. In...

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): G01C21/02G01C21/20
CPCG01C21/02G01C21/20
Inventor 崔平远袁旭朱圣英高艾徐瑞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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