Method and system for calculating impact center of small celestial body with unknown shape

A technology of impact center and calculation method, which is applied in the field of navigation information processing, can solve the problem of high risk of missing the impact center, and achieve the effects of reducing the risk of missing, increasing feasibility, and improving reliability

Active Publication Date: 2021-11-09
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0008] The main purpose of the present invention is to provide a method for calculating the impact center of a small celestial body with an unknown shape, aiming to solve the technical problems that existing similar methods rely on prior information on the shape of small celestial bodies and have a high risk of missing the impact center

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  • Method and system for calculating impact center of small celestial body with unknown shape
  • Method and system for calculating impact center of small celestial body with unknown shape
  • Method and system for calculating impact center of small celestial body with unknown shape

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. It should be noted that, in the present invention, terms such as “translation” and “rotation” used to describe spatial relative positional relationships should be interpreted in a broad sense unless otherwise specified and limited. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

[0052] The calculation method of the impact center of the small celestial body of unknown shape described in the...

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Abstract

The invention discloses a method and a system for calculating an impact center of a small celestial body with an unknown shape. The method for calculating the impact center of the small celestial body comprises the following steps of: S1, extracting an outline of a visible part of an asteroid in an image; S2, performing illumination true contour/illumination false contour segmentation; S3, identifying concave-convex characteristics of the illumination true contour; S4, selecting a proper estimation method to obtain an impact center of the small celestial body; S5, calculating a safety boundary distance of the impact center. According to the method, the impact center of the small celestial body with the unknown shape is calculated, and calculation of the impact center of the small celestial body does not depend on priori information of the shape of the small celestial body; the missing risk of the impact center of the small celestial body can be reduced, and the reliability of a small celestial body impact deflection prevention scheme is improved.

Description

technical field [0001] The invention belongs to the field of navigation information processing, and in particular relates to a method and system for calculating the impact center of a small celestial body with an unknown shape. Background technique [0002] The calculation of the impact center of small celestial bodies is an important content of small celestial body defense impact deflection optical navigation. Existing technologies include moment estimation method, contour scanning method, ellipse fitting method and cross-correlation method, etc., which have their own characteristics in terms of computational complexity, navigation accuracy, applicable celestial body types, and required prior information. [0003] The moment estimation method, referred to as the moment method, is the most basic and most effective center extraction algorithm. The moment method is to use the moment algorithm to estimate the brightness center of the target celestial body in the image. The pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/12G06T7/13G06T7/136G06T7/73G06T5/00G06T5/30G06T3/60
CPCG06T7/12G06T7/13G06T7/136G06T7/73G06T5/002G06T5/30G06T3/60
Inventor 袁浩王杰刘望罗青
Owner NAT UNIV OF DEFENSE TECH
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