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A Maritime Target Motion Estimation Method Based on Multi-source SAR Satellites

A motion estimation and target technology, which is applied in satellite radio beacon positioning system, radio wave reflection/reradiation, instruments, etc., can solve the problem that it is difficult to accurately extract sea target motion information from a single SAR image, and improve the accuracy of correlation The effect of high efficiency, improved accuracy, and easy fusion

Active Publication Date: 2021-03-30
NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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Problems solved by technology

[0005] Problems solved by the technology of the present invention: Aiming at the problem in the prior art that it is difficult to accurately extract motion information of maritime targets by using a single SAR image, a method for estimating motion of maritime targets based on multi-source SAR satellites is provided. Through the target correlation between SAR satellites, multiple Effective fusion of source SAR satellite information to accurately calculate the course and speed of maritime targets

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  • A Maritime Target Motion Estimation Method Based on Multi-source SAR Satellites
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  • A Maritime Target Motion Estimation Method Based on Multi-source SAR Satellites

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[0030] Below in conjunction with accompanying drawing, the present invention is described in more detail:

[0031] Such as figure 1 Shown, the present invention is concretely realized as follows:

[0032] Step 1: Target detection and parameter extraction

[0033] The invention uses the CFAR algorithm to segment the SAR image, obtains the center of mass position of the target and the corresponding target slice through morphological processing, and then obtains the geographic location of the target according to the coordinate conversion between the image space and the object space. According to the target slice, the main axis direction of the target is extracted through Radon transformation, and the ambiguous heading is estimated (there may be 180-degree direction ambiguity, which is further eliminated in step 3). According to the direction of the main axis of the target, the target slice is rotated to the horizontal direction, energy accumulation projection is performed, a ce...

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Abstract

The invention relates to a marine target motion estimation method based on multi-source SAR satellites. The method comprises the steps of: detecting a marine target by using a multi-source SAR satellite image obtain a target position and an image slice, and then performing parameter extraction by using the image slice to obtain a target length; performing fuzzy correlation by using the target position and the target length to solve the attribution problem of the same target in different satellite images; eliminating heading fuzziness by the time and the positions of the target in different satellite images to obtain the accurate heading of the marine target, and then obtaining the accurate speed of the marine target by speed iterative estimation. The method accurately solves the heading and the speed of the marine target through the target correlation between the SAR satellites, and can realize the effective fusion of the multi-source SAR satellite information.

Description

technical field [0001] The invention relates to a method for estimating motion of a sea target based on multi-source SAR satellites, and belongs to the technical field of motion estimation for a sea target in SAR satellite images. Background technique [0002] Synthetic Aperture Radar (SAR) satellites have the advantages of all-day and all-weather monitoring, and play a very important role in ocean surveillance. At present, very fruitful results have been achieved in the research on detection and recognition of maritime targets in SAR satellite images, but limited by the acquisition of multi-source SAR satellite data, there is little research on the fusion and monitoring of maritime targets in multi-source SAR satellite images. With the widespread demand for SAR satellites, some major countries and commercial companies have launched multiple SAR satellites, making it possible for multi-source SAR satellites to monitor maritime targets, and it has become a future development ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/42G01S13/90
CPCG01S13/90G01S19/42G01S13/9027G01S13/9058
Inventor 刘勇曹璐郭鹏宇朱效洲李献斌
Owner NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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