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Fast simulation method of high resolution SAR image

A simulation method and high-resolution technology, applied in the radar field, can solve problems such as limiting the application of ray tracing methods, obstacles in the simulation of multiple scattering characteristics, and too slow calculation speed, so as to reduce the number of intersections, fast simulation speed, and high simulation effect Effect

Active Publication Date: 2016-08-10
XIDIAN UNIV
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Problems solved by technology

For example, the grating-based high-resolution SAR image simulation method has obvious advantages in fast SAR image understanding, but there are obstacles in the simulation of multiple scattering characteristics.
Although the SAR image simulation method based on ray tracing can simulate the multiple scattering characteristics of the target scene well, the slow calculation speed seriously limits the application of the ray tracing method in SAR image simulation.

Method used

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  • Fast simulation method of high resolution SAR image
  • Fast simulation method of high resolution SAR image
  • Fast simulation method of high resolution SAR image

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] A fast simulation method for high-resolution SAR images, such as figure 1 As shown, the method includes the following steps:

[0028] Step 1, establish the three-dimensional coordinate system of the target scene, divide the surface of the target scene into a plurality of continuous triangular surfels, and determine the vertex coordinates of all the triangular surfels on the target scene surface in the three-dimensional coordinate system to form the tria...

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Abstract

The invention belongs to the technical field of radar and discloses a fast simulation method of a high resolution SAR image. The SAR image of a needed target scene can be efficiently and quickly simulated. The method is used for SAR image interpretation and automatic target recognition. The method comprises the steps that the three-dimensional model of the target scene is established; the imaging geometry of the target scene and the starting point and the direction vector of a needed sampling ray are determined; for the target scene, an SAH-BVH bin dividing structure based on bin is established; the BVH structure is used to carry out rapid ray tracing, and intersection information is acquired; an acquired backscattering energy diagram is determined; a final SAR image is synthesized; and corresponding noise is added.

Description

Technical field [0001] The invention relates to the field of radar technology, and in particular to a rapid simulation method of high-resolution SAR images, which is used to expand the existing SAR image sample library and assist in the automatic identification of synthetic aperture radar targets. Background technique [0002] SAR images reflect the electromagnetic scattering of the target. The special working mechanism of SAR and the complexity of target scattering make SAR images very different from visible light images. They have many unique characteristics, such as coherent speckle noise, slope shrinkage, top and bottom Inversion, overlapping, etc. The particularity of SAR images brings huge challenges to the understanding and application of SAR images. [0003] SAR image simulation is an important means for understanding SAR images. Scholars have conducted a lot of research around SAR image simulation technology and proposed various simulation methods. Commonly used S...

Claims

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Application Information

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IPC IPC(8): G01S13/90G01S7/40G01S7/41
CPCG01S7/4052G01S7/41G01S13/90
Inventor 霍帅张磊陈渤刘宏伟
Owner XIDIAN UNIV
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