Target celestial body image culmination circle judgment method for deep space detection autonomous navigation

A target celestial body, autonomous navigation technology, applied in astronomical navigation, image analysis, image data processing and other directions, to achieve the effect of high refresh rate, improved positioning accuracy, and high robustness

Active Publication Date: 2013-02-27
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0004] The problem solved by the technology of the present invention is: to overcome the deficiencies of the prior art, to provide a method for judging the morning and evening line of the target cele

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  • Target celestial body image culmination circle judgment method for deep space detection autonomous navigation
  • Target celestial body image culmination circle judgment method for deep space detection autonomous navigation
  • Target celestial body image culmination circle judgment method for deep space detection autonomous navigation

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 Shown is the input target celestial body image, because of the target celestial body image caused by the sun irradiation and the sensor shooting position (a, b both have the morning and evening line c does not exist the morning and evening line), the target celestial image with the morning and evening line obviously cannot be directly obtained by its 360 The edge points of ° fit the center position.

[0024] Such as image 3 Shown, the specific implementation steps of the present invention are as follows:

[0025] (1) Edge extraction of the target celestial image, using the threshold method to segment the target celestial image, and then using the tangent method to extract the edge points of the celestial image;

[0026] (2) Calculate the gradient size of the edge point, and calculate the gradient size of all the edg...

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Abstract

The invention relates to a target celestial body image culmination circle judgment method for deep space detection autonomous navigation. The method comprises: carrying out edge extraction on a target celestial body image, wherein a traditional edge operator method is adopted to carry out edge point extraction; selecting a candidate arc segment; carrying out fitting judgment; and carrying out culmination circle supplement judgment. A fitting precision of a center position of a target celestial body image can be directly affected if a culmination circle of a space target is not judged and is eliminated. With the present invention, a problem of target celestial body culmination circle judgment in interplanetary detection can be solved, and culmination circle judgment is adopted to find a true edge point to carry out target celestial body center position fitting so as to enhance a positioning precision of the celestial body image target center; and important engineering use values are provided for developments of high robustness, high refresh rate and high precision navigation celestial body sensors.

Description

technical field [0001] The invention relates to a method for judging the morning and evening line of a target celestial body image for autonomous navigation of deep space exploration, and belongs to the field of space optical imaging sensors. Background technique [0002] It is necessary to take pictures of other deep space exploration targets such as Mars and determine the direction of the Mars vector in both the Benhuo and the Huohu arcs. Due to the constraints of the sun's illumination and orbital position, the image of Mars will have a morning and evening line similar to the moon. At this time, if the point used for Mars center vector fitting uses the morning and evening line point, it will directly affect the positioning accuracy, which must be judged during the fitting process. The morning and evening line points are excluded, so a method for judging the morning and evening line must be designed. Document 1, Li Zheng, Determining the Morning and Dusk Line, Middle Scho...

Claims

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Application Information

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IPC IPC(8): G01C21/02G06T7/00
Inventor 王立周建涛余成武王大轶黄翔宇
Owner BEIJING INST OF CONTROL ENG
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