Method and system for inverting ocean vortex dynamic parameters in SAR (Synthetic Aperture Radar) image

A technology in parameter inversion and image, applied in the field of microwave remote sensing, which can solve the problem of poor inversion accuracy of vortex dynamic parameters

Pending Publication Date: 2022-05-13
BEIJING INST OF ELECTRONICS SYST ENG
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Problems solved by technology

However, the curve fitting method only considers the influence of additive random noise, and the influence of multiplicative coherent speckle noise in SAR images is also particular

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  • Method and system for inverting ocean vortex dynamic parameters in SAR (Synthetic Aperture Radar) image
  • Method and system for inverting ocean vortex dynamic parameters in SAR (Synthetic Aperture Radar) image
  • Method and system for inverting ocean vortex dynamic parameters in SAR (Synthetic Aperture Radar) image

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[0042] 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.

[0043] At present, the inversion of vortex parameters in SAR images is based on the curve fitting method, and the inversion accuracy of vortex dynamic parameters is poor due to the mismatch of model noise.

[0044] Based on this, the present invention provides a method for inversion of dynamic parameters of ocean eddies in SAR images, such as figure 1 shown, including:

[0045] According to the wave-radar modulation transfer function and the eddy empirical v...

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Abstract

The invention provides a method and a system for inverting ocean vortex dynamic parameters in an SAR (Synthetic Aperture Radar) image, which are used for inverting and extracting vortex dynamic characteristics based on a vortex SAR imaging theoretical model and constructing a quantitative relation between a radar backscattering coefficient of the SAR image and a vortex physical model. Different from previous digital image processing, machine learning and other methods, only the position and radius characteristics of the vortex can be extracted. Vortex dynamic parameters obtained through inversion of the method include the vortex center position, the suction intensity, the viscosity coefficient, the speed circulation, the maximum vortex rotation speed radius, the maximum rotation angular speed, the maximum vortex intensity and other dynamic parameters.

Description

technical field [0001] The invention relates to the technical field of microwave remote sensing, in particular to a method and system for retrieving dynamic parameters of ocean eddies in SAR images. Background technique [0002] At present, the quantitative detection of eddies based on SAR images is mostly carried out from the perspective of image processing, and the inversion of vortex information is carried out according to the gray value characteristics of SAR images. However, in order to study the physical ocean process of eddies and quantitatively interpret the characteristics and dynamic process of eddies in SAR images, it is necessary to establish the connection between the SAR image radar backscatter coefficient and the eddy physical model. In the vortex SAR imaging theory On the basis of the model, a SAR image-based inversion model and method for the dynamic parameters of the marine eddy is constructed, and the dynamic characteristic parameters of the vortex are ret...

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Application Information

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IPC IPC(8): G01S13/90G06V20/00G06V10/24G06F17/16G06F17/15G06F17/12
CPCG01S13/9021G06F17/16G06F17/15G06F17/12
Inventor 王宇航武思军孔维亚李国令牛杰
Owner BEIJING INST OF ELECTRONICS SYST ENG
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