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Planet surface navigation characteristic imaging matching detection method

A planetary surface and feature imaging technology, which is applied to integrated navigators, image analysis, image data processing, etc., can solve problems such as difficult operation, low solution accuracy, and complex implementation

Active Publication Date: 2019-12-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

This method uses the relationship between the area of ​​the dark and bright areas to solve the direction of the sun's illumination, which will lead to low solution accuracy, and there are too many pairing constraints in the dark and bright areas, which is difficult to operate and complex to implement.

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  • Planet surface navigation characteristic imaging matching detection method
  • Planet surface navigation characteristic imaging matching detection method

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Embodiment Construction

[0059] In order to better illustrate the purpose and advantages of the present invention, the content of the invention will be further described below in conjunction with the accompanying drawings and examples.

[0060] In order to verify the feasibility of the present invention, utilize the image of the crater on the surface of Mercury that is actually taken, such as figure 2 , for mathematical simulation verification.

[0061] The planetary surface navigation feature imaging matching detection method disclosed in this embodiment, such as figure 1 As shown, the specific implementation steps are as follows:

[0062] Step 1: Extract the shadow area and bright area of ​​the planet surface navigation features by image threshold segmentation.

[0063] The surface terrain image of the target planet captured by the navigation optical camera, such as figure 2 , the crater is under the illumination condition, and the imaging features are as follows image 3 shown. When the sunl...

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Abstract

The invention relates to a planet surface navigation characteristic imaging matching detection method, and belongs to the technical field of deep space probe autonomous navigation. The planet surfacenavigation characteristic imaging matching detection method includes: using navigation images shot by a deep space detector to extract a shadow region and a bright region of the planet surface navigation features through image threshold segmentation; according to the shape characteristics of the shadow area, setting pairing search window size, considering the minimum pairing distance and the illumination direction consistency; converting the matching problem of the shadow area and the bright area of the navigation characteristics into the problem of solving the minimum matching index, constructing the imaging matching index of the dark and bright area of the navigation characteristics, carrying out matching search, carrying out ellipse fitting on the navigation characteristics which are correctly matched. An accurate and feasible autonomous detection method is provided for a deep space exploration navigation system.

Description

technical field [0001] The invention relates to a method for imaging and matching detection of navigation features on the surface of a planet. Optical navigation features refer to terrain features such as craters and rocks on the surface of a planet that can be used for detector navigation, and are especially suitable for deep space where optical navigation features are used as observation information. A detection and navigation system, the invention belongs to the technical field of autonomous navigation of deep space probes. Background technique [0002] Near-target celestial object flight will be one of the core tasks of deep space exploration in the future, and autonomous navigation technology is one of the key technologies for planetary exploration. The deep space exploration has a long distance and a long time, and the traditional measurement and control method has a large communication delay. In addition, the dynamic environment of deep space is complex, and the trad...

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Application Information

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IPC IPC(8): G06K9/62G06T7/11G06T7/136G01C21/24
CPCG06T7/11G06T7/136G01C21/24G06F18/22
Inventor 朱圣英修义崔平远徐瑞梁子璇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY