Geometric structure based complex target SAR image simulation method

A technology of complex target and geometric structure, applied in the field of complex target SAR image simulation, to achieve the effect of satisfying recognition and interpretation, and fast calculation speed

Inactive Publication Date: 2013-10-02
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

However, Rasterization can only deal with single scattering, and the typical geometric dis...

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  • Geometric structure based complex target SAR image simulation method
  • Geometric structure based complex target SAR image simulation method
  • Geometric structure based complex target SAR image simulation method

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Embodiment Construction

[0017] Such as figure 1 As shown, the flow diagram of the multi-class complex target recognition method based on multi-class primitive autonomous learning of the present invention includes the following steps:

[0018] The first step is to read in the target 3D model text and obtain spatial information;

[0019] 1.1. Read the target 3D model file in .DS format. The target 3D model is established with small triangular facets as the basic unit. By reading the vertex coordinates of each triangular facet on the target surface [x i ,y i ,z i ], calculate the normal vector of the triangular facet Obtain target space information;

[0020] 1.2. Adjust the size of the target model through the scale transformation of the vertex coordinates of the triangular facet, so that the size of the target model is consistent with the real target, and the target is located at the origin of the defined spatial coordinate system through coordinate translation;

[0021] The second step, SAR imaging geometry s...

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Abstract

The invention aims to provide a geometric structure based complex target SAR image simulation method, which can acquire simulation images with various viewing angles and various resolution ratios, and is used for assisting SAR image interpretation and automatic identification of complex targets. The method comprises the steps of: first, reading files of a target 3D model and acquiring spatial information, that is, calculating normal vectors of triangular surface elements through reading the vertex coordinates of triangular surface elements on the surface of the target and acquiring the spatial information of the target; second, carrying out SAR imaging geometrical simulation, that is, judging the surface element which receives radar signals on the surface of the target according to radar side looking imaging principles and recording the projection position of each of the visible surface element on the image; third, calculating the relative back scattering intensity of each position of the target model; and fourth, producing an SAR simulation image.

Description

Technical field [0001] The invention belongs to the technical field of synthetic aperture radar, and relates to a SAR simulation imaging method, in particular to a SAR image simulation method of a complex target based on a geometric structure. Background technique [0002] Synthetic Aperture Radar (SAR, Synthetic Aperture Radar) is an active high-resolution microwave imaging radar. Due to its all-time and all-weather advantages, it is used in military reconnaissance, earth remote sensing, marine research, environmental protection and disaster detection. It has a wide range of applications. SAR can provide detailed ground surveying and mapping data and images under all-weather conditions and a penetrating field of view. SAR images can be used to easily find and identify aircraft (groups), tanks, airports and aprons, various vehicles, etc. Target recognition for SAR images has received more and more attention. Traditional SAR target recognition methods mostly rely on manual visua...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S13/90
Inventor 唐侃付琨王宏琦
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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