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

Multi-baseline vegetation height inversion method and device considering geometric constraints

A geometry-constrained, high-level inversion technology, applied in measurement devices, radio wave reflection/re-radiation, radio wave measurement systems, etc., can solve problems such as unsatisfactory inversion results

Active Publication Date: 2020-11-20
CENT SOUTH UNIV
View PDF14 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to various practical factors, different interference pairs may be affected by different error sources during acquisition, but they can still invert the vegetation height, but the inversion effect may not be ideal

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
  • Multi-baseline vegetation height inversion method and device considering geometric constraints
  • Multi-baseline vegetation height inversion method and device considering geometric constraints
  • Multi-baseline vegetation height inversion method and device considering geometric constraints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The following is a detailed description of the embodiments of the present invention. This embodiment is carried out based on the technical solution of the present invention, and provides detailed implementation methods and specific operation processes to further explain the technical solution of the present invention.

[0056] This embodiment provides a multi-baseline vegetation height retrieval method that takes into account geometric constraints, such as figure 1 described, including the following steps:

[0057] Step S10, obtaining N-scene SAR images related to the covered vegetation area, performing registration, flattening, multi-view and polarization interference processing to form N-1 interference pairs, and each interference pair obtains Q polarization complex coherence coefficients, The general formula of the polarization complex coherence coefficient is expressed as Indicates the interference pair, p=1,2,…,N-1; w indicates the polarization vector, q indicate...

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 discloses a multi-baseline vegetation height inversion method and device considering geometric constraints, and the method comprises the steps: obtaining a multi-scene SAR image for preprocessing, and obtaining various polarization complex coherence coefficients of a plurality of interference pairs; specifying a main interference pair and a geometric constraint interference pair; specifying an RVoG model as a vegetation height inversion model, constructing an observation equation set by utilizing the polarization complex coherence coefficient of the main interference pair, and calculating a multi-parameter initial value by adopting a three-stage vegetation height inversion algorithm; carrying out linear fitting on the polarization complex coherence coefficient of the geometric constraint interference pair, and constructing geometric constraint conditions related to the vegetation height and the extinction coefficient; and solving unknown parameters including the vegetation height in the observation equation set by using the initial values of the parameters and the geometric constraint conditions and adopting a nonlinear iterative algorithm. According to the method, under the condition that multi-scene SAR images exist, the relation between vegetation parameters and data is converted into geometric constraint conditions, and the vegetation height inversion effect is good.

Description

technical field [0001] The invention relates to the field of vegetation parameter inversion of polarization synthetic aperture radar interferometry (PolInSAR), in particular to a multi-baseline vegetation height inversion method and device in consideration of geometric constraints. Background technique [0002] Forest height is an important indicator for studying the global carbon cycle, the acquisition of the shape of the real "bare earth", and the change of forest stock volume. In recent years, the technology of polarimetric synthetic aperture radar interferometry (PolInSAR) has developed rapidly and has become one of the most widely used technologies for vegetation height retrieval on a large scale or even a global scale. [0003] At present, the most widely used scattering model for vegetation height extraction using PolInSAR technology is the Random Volume over Ground (RVoG) model proposed in 1996. When there are multiple SAR images covering the same area, multiple int...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/90
Inventor 朱建军张兵付海强李志伟胡俊
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com