Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

InSAR (Interferometric Synthetic Aperture Radar) image phase unwrapping method based on phase difference statistic model

A statistical model, phase unwrapping technology, applied in the field of radar, can solve problems such as inability to solve, unable to improve the efficiency of operation, accuracy of unwrapping results, inaccurate results, etc.

Active Publication Date: 2016-11-09
SHANDONG UNIV OF SCI & TECH
View PDF4 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the nonlinear unwrapping model solves the large-pixel interference image, it uses the iterative method of linear approximation, which cannot improve the efficiency of the operation and the accuracy of the unwrapping result, and sometimes it cannot be solved, and the terrain is not directly considered in the filtering or unwrapping The effect of the change on the phase difference, the result obtained is not accurate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • InSAR (Interferometric Synthetic Aperture Radar) image phase unwrapping method based on phase difference statistic model
  • InSAR (Interferometric Synthetic Aperture Radar) image phase unwrapping method based on phase difference statistic model
  • InSAR (Interferometric Synthetic Aperture Radar) image phase unwrapping method based on phase difference statistic model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0032] In order to facilitate technical description in the present invention, at first carry out following definition:

[0033] Definition 1: Assume that the slant distance difference between the two observations of the interferometric radar is ΔR, and the phase difference between the two observations is the formula Δφ, and the formulas of the two are as follows,

[0034] Δ R = B / / + B ⊥ R 0 [ R 1 - R 0 t a n ( ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of radar technologies and particularly relates to the field of phase unwrapping technologies in InSAR (Interferometric Synthetic Aperture Radar) image processing. The invention provides an InSAR image phase unwrapping method based on a phase difference statistic model. Firstly, a phase difference derivative function and a landform height variation relation expression are utilized to derive an InSAR phase difference statistic model. A phase difference statistic function is utilized to estimate influences of phase change considering system decoherence factors and landform fluctuating change on phase unwrapping. In phase unwrapping, the phase difference statistic model is utilized as a nonlinear constraint condition of least square phase unwrapping, the phase difference extreme value problem before and after unwrapping is replaced by the phase difference integer multiple difference problem before and after unwrapping in the model resolving. The phase unwrapping is performed by solving the integer multiple difference minimum before and after phase unwrapping.

Description

technical field [0001] The present invention relates to the technical field of radar, in particular to synthetic aperture radar interferometry (InSAR) image processing [0002] Phase unwrapping method. Background technique [0003] Phase unwrapping is one of the key steps in InSAR data processing. The accuracy of the data processing results directly affects the accuracy of the final data product. However, phase unwrapping is called an NP problem, which is subject to two types of phase decoherence factors (phase noise) The impact of: one is caused by the processing system itself, such as thermal noise, time decoherence, baseline decoherence (because the antenna line of sight is not completely parallel), and the noise introduced by the interpolation algorithm or image filtering algorithm in the image registration process; the other One is the geometric phase distortion caused by phase undersampling caused by the fluctuation of terrain, which causes coherent speckle noise. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01S13/90
CPCG01S13/9023
Inventor 不公告发明人
Owner SHANDONG UNIV OF SCI & TECH
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com