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Ship ISAR image structure feature extraction method

A technology of structural features and extraction methods, applied in the field of structural feature extraction, can solve the problems of insufficient ISAR imaging research results, affecting the quality of ISAR imaging, and complex attitude changes

Inactive Publication Date: 2015-12-02
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0003] So far, the imaging of aircraft targets has been deeply researched at home and abroad, but the research results of ISAR imaging of ship targets are not rich enough
As far as the imaging principle is concerned, there is not much difference between ship and aircraft target imaging, but under the influence of sea wave fluctuations, the change of ship target attitude will be more complicated, which will affect the quality of ISAR imaging, and further research is needed

Method used

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  • Ship ISAR image structure feature extraction method
  • Ship ISAR image structure feature extraction method
  • Ship ISAR image structure feature extraction method

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Embodiment Construction

[0033] The technical solution of the present invention will be described in detail below in combination with the embodiments and the accompanying drawings.

[0034] Select the "Nimitz" aircraft carrier for modeling.

[0035] The real dimensions of the "Nimitz" aircraft carrier are as follows: the length of the ship is 332.9 meters, the width of the ship is 40.8 meters, the width of the flight deck is 76.8 meters, and the draft is 11.3 meters. A scatter point is taken every 5m on the ship to ensure that the entire image can be observed at a high resolution, and the scatter point image is drawn according to the structure of the original image. like figure 2 Shown is the top view and tail view scatter point map of the "Nimitz" aircraft carrier.

[0036] ISAR imaging simulation is carried out on the image of ship scattering point modeling.

[0037] Carrier frequency f c

[0038] Table I

[0039] Using the radar parameters given in Table 1 and the ship’s scattering p...

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Abstract

The invention belongs to the ship target ISAR imaging simulation technology field, and especially relates to extraction of structure features of length, width and the like of a deck of a ship target. Firstly, a ship target is simulated by utilization of a scattering point model, then ISAR imaging of the ship target in a sea clutter environment is simulated, finally, the ISAR image is pretreated, and the structure features ( the deck length and the deck width) of the ship target are obtained. The extraction method solves the problem of extraction of structure features of a ship target, and has good effects on extraction of structure features of ship targets at different angles.

Description

technical field [0001] The invention belongs to the technical field of performing ISAR imaging simulation on a ship target, and in particular relates to extracting structural features such as deck length and deck width of the ship target. Background technique [0002] Inverse synthetic aperture radar (Inverse synthetic aperture radar, ISAR) is an important high-resolution radar, which can acquire images of non-cooperative targets all-weather, all-time, and long-distance, and has important military and civilian values. With the continuous development of actual needs, the research on ISAR imaging technology is also deepening. The emergence of TM is aimed at solving the imaging problem of moving targets, and is usually used for imaging non-cooperative targets. The importance of surface target imaging mainly includes: In terms of national defense, if you can gain the initiative on the sea, you can get very huge strategic significance, so that you can grasp the initiative of the...

Claims

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/904G01S13/9064
Inventor 周代英余为知黄健
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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