Triangular star map matching method based on redundant reference star

A matching method and triangle technology, applied in the field of star map matching, can solve problems such as large workload, large storage capacity, and non-unique matching, and achieve the effect of improving matching recognition rate and accuracy

Pending Publication Date: 2021-06-01
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The triangle matching algorithm has a simple structure and is easy to implement, but its characteristic mode dimension is low. Therefore, the formed matching triangle usually has problems such as n...

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  • Triangular star map matching method based on redundant reference star
  • Triangular star map matching method based on redundant reference star
  • Triangular star map matching method based on redundant reference star

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Embodiment Construction

[0033]The invention is further illustrated in connection with the accompanying drawings and examples, and the present invention includes, but is not limited to the following examples.

[0034]The idea of ​​the present invention is: First, construct from M in the CCD star image1The CCD Star Library of Bright Stars, selects three stars to establish a basic triangle that satisfies the setting condition; secondly, select M in the star table2The reference star builds reference Star library, establishing a triangle to match; third, calculate the base triangle and the pitch and angle of the triangle to be matched, and matches the difference between the corresponding image distance and the correspondence angle; fourth In accordance with the three-point positioning principle, the matching of the CCD star image and the reference star table is achieved in conjunction with the corresponding angular relationship.

[0035]Such asfigure 1 As shown, the technical solution employed in the embodiment of th...

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Abstract

The invention provides a triangular star map matching method based on redundant reference stars. The method comprises the following steps of: constructing a CCD star image library consisting of m1 bright stars in a CCD star image, and selecting three stars to establish a basic triangle meeting a set condition; selecting m <2> reference stars from a star catalogue to construct a reference star library, and establishing a to-be-matched triangle; respectively calculating image distances and included angles of the basic triangle and the to-be-matched triangle, and realizing matching of the basic triangle according to a corresponding image distance difference and a corresponding angle difference; and according to a three-point positioning principle, realizing the matching of a CCD star image with a fixed star in a reference star catalogue on the basis of a corresponding angle relation. According to the method, the problems of non-unique matching and high mismatching rate of a triangle algorithm are solved, the star map recognition matching rate and accuracy are remarkably improved. The method is suitable for star map recognition in the fields of astronomical navigation, astronomical geodesic and the like.

Description

Technical field[0001]The present invention relates to the field of astronomical navigation and astronomy, and more particularly to a star map matching method.Background technique[0002]The star map identifies the matching of the star in the observed image with the reference star in the star table to establish a correspondence between the CCD star image and the star, to establish a CCD image metric coordinate system and reference star cutting level ideal coordinate system The conversion model laying the foundation.[0003]With the widespread application of astronomical navigation technology, many scholars at home and abroad conduct a large number of studies in the star diagram identification technology, propose multilateral angular angle matching algorithms, triangular matching algorithms, raster algorithms, and algorithms that utilize the axis image templates, etc. The method of illustration. Although the star diagram identification method is much, it is really used for engineering pra...

Claims

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Application Information

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IPC IPC(8): G01C21/02
CPCG01C21/02G01C21/025
Inventor 李变屈俐俐高玉平刘娜
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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