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a use l 0 Fast two-dimensional phase unwrapping method for norm cost function

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

Active Publication Date: 2021-10-26
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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  • a use l <sup>0</sup> Fast two-dimensional phase unwrapping method for norm cost function
  • a use l <sup>0</sup> Fast two-dimensional phase unwrapping method for norm cost function
  • a use l <sup>0</sup> Fast two-dimensional phase unwrapping method for norm cost function

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[0074] 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.

[0075] 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:

[0076] In the numerical implementation of the algorithm for solving differential equations, the differential relationship must first be transformed into a differential relationship corresponding to the discrete data. When the differential equation is iteratively solved and iteratively processed, each step of ...

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Abstract

The invention discloses a method using L 0 The two-dimensional phase fast unwrapping method of the norm cost function includes the following content: the numerical implementation of the algorithm for solving the differential equation, generally, the differential relationship must first be converted into the differential relationship corresponding to the discrete data, and the differential equation is iteratively solved when iterative processing , each step of processing is carried out on the basis of the results of the previous step, and the difference δφ between the results of the two steps of processing becomes an important content of the solution. The use of L 0 The two-dimensional phase fast unwrapping method of the norm cost function, aiming at the low efficiency of the existing phase unwrapping method for processing large data blocks, the present invention analyzes the characteristics of the cost function for the traditional minimum norm unwrapping method, propose a method that conforms to L 0 The two-dimensional phase unwrapping method of the norm cost function, combined with the data block scheme, solves the problem of full convergence of low-frequency errors in linear differential equations, so as to improve the efficiency of unwrapping processing.

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 Patents(China)
IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 石娟高建杨毅
Owner HUAIHAI INST OF TECH
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