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Two-dimension phase fast unwrapping method using L<0> norm cost function

A technology of cost function and phase, applied in the field of interferometric synthetic aperture radar phase unwrapping, can solve the problem of low efficiency of large data blocks

Active Publication Date: 2018-03-09
HUAIHAI INST OF TECH
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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a 0 The two-dimensional phase fast unwrapping method of the norm cost function has the advantages of high unwrapping efficiency, and solves the problem of low efficiency of the existing phase unwrapping method in processing large data blocks

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  • Two-dimension phase fast unwrapping method using L&lt;0&gt; norm cost function

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[0099] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.

[0100] The invention provides a technical solution: a method using L 0 A two-dimensional phase fast unwrapping method for a norm cost function, including the following:

[0101] In the numerical implementation of the algorithm for solving differential equations, it is generally necessary to convert the differential relationship into a differential relationship corresponding to the discrete data. When performing iterative solution of the differential equation and iterative proc...

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Abstract

The invention discloses a two-dimension phase fast unwrapping method using an L<0> norm cost function; the method comprises the following steps: numerical realization of solving a differential equation algorithm, firstly converting a differential relation into a difference relation corresponding to discrete data, then carrying out difference equation iteration solving, wherein each step treatmentis carried out on the basis of the previous step treatment result in the iteration process, and the difference [delta] [phi] between the two processing steps becomes the solving important content. Thetwo-dimension phase fast unwrapping method using the L<0> norm cost function can solve the problems that an existing phase unwrapping method is low in efficiency when processing big data blocks. Themethod aims at the conventional minimum norm unwrapping method, analyzes the cost function characteristics, and provides the two-dimension phase fast unwrapping method complying with the L<0> norm cost function; combined with a data partitioning scheme, the method can solve the full low frequency aberration convergence problems in the linear differential equation, and improving the unwrapping efficiency.

Description

technical field [0001] The invention relates to the technical field of interferometric synthetic aperture radar (InSAR) phase unwrapping, specifically a method using L 0 Two-dimensional phase fast unwrapping methods for norm cost functions. Background technique [0002] Phase unwrapping is an important step in data processing in research fields such as Synthetic Aperture Radar Interferometry (InSAR), Synthetic Aperture Sonar Interferometry (InSAS), and Medical Magnetic Resonance Imaging (MRI). meaning. [0003] Existing unwrapping methods can basically be divided into two types: path-guided and optimal approximation. The basic principle of path-guided methods is to obtain relevant information from the inside of the data according to certain rules, and formulate a phase calculation route that avoids discontinuous boundaries. Methods include branch-cut method, quality map guidance method, Flynn minimum discontinuity method, method based on network flow, etc. These methods be...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 石娟高建杨毅
Owner HUAIHAI INST OF TECH
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