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Airborne optic robust scene matching navigation and positioning method

A technology of navigation positioning and matching algorithm, applied in the direction of combined navigator, etc., can solve the problem of reducing the reliability of matching system, and achieve the effect of improving reliability and navigation and positioning accuracy

Active Publication Date: 2012-01-18
BEIHANG UNIV
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the reduced reliability of the matching system when the existing scene matching algorithm is applied on the aircraft, and propose an airborne optical robust scene matching navigation positioning method

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  • Airborne optic robust scene matching navigation and positioning method
  • Airborne optic robust scene matching navigation and positioning method

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Embodiment Construction

[0026] like Figure 1-6 Shown, the concrete realization steps of the present invention are as follows:

[0027] (1) Analyze the adaptability of existing scene matching algorithms under complex flight conditions, the specific features are:

[0028] ① The existing scene matching algorithms are pixel-level matching algorithm and feature-level matching algorithm;

[0029] ②The complex flight conditions are that the image is distorted due to the maneuvering flight of the aircraft, or the image is noisy or the contrast is low due to the influence of weather factors, or the image is blurred due to the influence of airflow, or even cannot be imaged. The weather factors include clouds, Rain, fog and smoke.

[0030] (2) if figure 2 As shown, the steps to establish the relationship model between various matching algorithms and system matching reliability under complex flight conditions are as follows:

[0031] ① Establish a real-time image database and a reference image database und...

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Abstract

The invention discloses an airborne optic robust scene matching navigation and positioning method. The method comprises the following steps: firstly, analyzing the adaptability of the existing scene matching algorithm to the complicated airborne condition; secondly, building a relational model between different matching algorithms and the system matching reliability under the complicated airborne condition; thirdly, building the application condition and application range of the scene matching algorithm according to the relational model, and forming an algorithm rule base and an algorithm library; and finally, finishing the airborne scene matching positioning based on a knowledge reasoning adaptive selection algorithm or algorithm combination according to the prior information of an image. By the adoption of the method, the robustness and reliability of an airborne scene matching system can be improved.

Description

technical field [0001] The invention relates to an airborne scene matching navigation positioning method, in particular to an airborne optical robust scene matching navigation positioning method, which is suitable for an airborne scene matching navigation positioning system. Background technique [0002] Scene matching technology is a technology that uses the real-time scene image collected by the image sensor mounted on the aircraft during the flight and the pre-prepared reference scene image to perform real-time matching calculations to obtain precise positioning information. It can be seen from the Gulf War, the Kosovo War and the Iraq War that advanced countries such as Europe and the United States have achieved huge economic and military benefits by applying scene matching technology to tactical aircraft and drones. At present, my country's use of scene matching technology to realize the application of precise navigation and positioning of aircraft and precise attack on...

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Application Information

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IPC IPC(8): G01C21/24
Inventor 赵龙段勇勇龙佳
Owner BEIHANG UNIV
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