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

Method and system for filtering pseudo-star targets of large-view-field star sensor

A star sensor and large field of view technology, applied in the field of astronomical navigation, can solve the problem of difficult to eliminate false star targets

Active Publication Date: 2021-04-02
HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The star sensor can filter out the pseudo-star target through the characteristic difference between the non-star target and the real star target, but it is difficult to eliminate the pseudo-star target with characteristics similar to the real star target by single-frame image processing

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
  • Method and system for filtering pseudo-star targets of large-view-field star sensor
  • Method and system for filtering pseudo-star targets of large-view-field star sensor
  • Method and system for filtering pseudo-star targets of large-view-field star sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0054] This embodiment provides a system for filtering out false star targets of a star sensor with a large field of view, including:

[0055] The inter-frame correlation judgment module sets the detection targets of the current frame, the previous frame, and the previous two frames as sequence A, sequence B, and sequence C, respectively, between sequence A and sequence B, between sequence A and sequence C, and between sequence A and sequence C. The angular distance between any two targets between B and sequence C and the gray scale deviation between the two targets are used to judge whether there is inter-frame correlation between all the targets in sequence A and the targets in sequence B and sequence C;

[0056] ...

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 and system for filtering pseudo-star targets of a large-view-field star sensor. The method comprises the steps of respectively calculating the angular distance between any two targets in a current frame and a former frame, in the current frame and a former two frame, and in the former one frame and the former two frame and the gray deviation between the two targets, and judging whether all targets in the current frame and the former two frames have inter-frame correlation or not; for the targets with inter-frame correlation, carrying out primary filtering on the pseudo-star targets based on the characteristic that the inter-frame angular distance of the real star targets is stable and invariable; and for the target result after the primary filtering, performing secondary filtering on the pseudo-star targets based on the characteristics of the relative concentration of the inter-frame real star target motion angular distance, and outputting the remaining targets as real star targets. According to the method, inter-frame correlation processing is carried out in combination with motion characteristics of the targets, effective filtering of the pseudo-star targets is realized, the attitude output efficiency of the star sensor is ensured, and the use requirements of a control system are met.

Description

technical field [0001] The present invention relates to the technical field of celestial navigation, in particular to a method and system for filtering out pseudo-star targets of a large field of view star sensor based on target frame correlation processing. Background technique [0002] In the astronomical photoelectric observation system, there are different degrees of false star targets in the star measurement images. The false star targets are caused by the engine plume or non-stellar space targets irradiated by sunlight, so that a small amount of energy is concentrated to the detector by the optical system. Spot-like targets formed on the target surface. The star sensor can filter the pseudo-star target through the characteristic difference between the non-star target and the real star target, but it is difficult to eliminate the pseudo-star target whose characteristics are similar to the real star target by single-frame image processing. Contents of the invention ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02
CPCG01C21/02
Inventor 王亮黄海朱生国尹伟张前程
Owner HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
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