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Simulation Method of Spatial Correlation Polarized SAR Clutter Image Based on Inverse Transform Method

A technology of spatial correlation and inverse transformation method, which is applied in the field of polarization SAR clutter image simulation to achieve a wide range of applications.

Active Publication Date: 2017-02-22
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0005] In order to effectively solve the simulation problem of polarimetric SAR clutter images, the present invention provides a method for simulating spatially correlated polarimetric SAR clutter images based on the inverse transform method

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  • Simulation Method of Spatial Correlation Polarized SAR Clutter Image Based on Inverse Transform Method
  • Simulation Method of Spatial Correlation Polarized SAR Clutter Image Based on Inverse Transform Method
  • Simulation Method of Spatial Correlation Polarized SAR Clutter Image Based on Inverse Transform Method

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Embodiment Construction

[0041] The method for simulating spatially correlated polarimetric SAR clutter images provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] figure 1 It is a flow chart of the polarization SAR clutter image simulation method of the present invention. The first step in the process is the simulation of coherent speckle images with complex Wishart distribution. Firstly, the L-view coherent speckle component image is simulated according to the polarization covariance matrix of the known polarimetric SAR image. The second step is the simulation of spatially correlated Fisher distribution texture images. Based on randomly generated Gaussian distribution images with a mean of 0 and a variance of 1, a texture image that obeys a spatially correlated unit mean Fisher distribution is obtained. The third step is the generation of polarimetric SAR clutter images with spatially correlated KummerU distribution. Since th...

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Abstract

The invention provides a space correlation polarization SAR clutter image simulation method based on an inverse transformation method. According to the technical scheme, the method comprises the step one of simulation of coherent speckle images of Wishart distribution, the step two of simulation of texture images of space correlation Fisher distribution, and the step three of generation of polarization SAR clutter images of space correlation KummerU distribution. Simulated coherent speckles and texture are multiplied to obtain simulated polarization SAR clutter images. The method has the advantages that the polarization SAR clutter images complying with KummerU distribution can be simulated; KummerU distribution can represent the statistical property of the polarization SAR clutter images and especially the high-resolution polarization SAR clutter images better, and the method can be applied to simulation of a large number of the polarization SAR clutter images based on a statistical method.

Description

technical field [0001] The present invention relates to the technical field of imaging radar clutter image simulation, in particular to a polarization SAR (Synthetic Aperture Radar, Synthetic Aperture Radar) clutter image simulation method. Background technique [0002] SAR is an active microwave imaging sensor with all-day and all-weather imaging capabilities. Polarization SAR is a new system of SAR, which can work in multiple different polarization combinations at the same time. Compared with conventional SAR images, polarimetric SAR images contain richer target information, which makes polarimetric SAR images widely used in many military and civilian fields. [0003] Polarimetric SAR image simulation plays a very important role in polarimetric SAR image interpretation, and can be generally divided into two categories. The first type of method simulates the entire polarimetric SAR imaging system, which focuses on the simulation of the original polarimetric SAR signals of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 邹焕新秦先祥周石琳计科峰孙浩
Owner NAT UNIV OF DEFENSE TECH