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Vegetation parameter inversion method, terminal equipment and storage medium

A technology of vegetation parameter inversion and vegetation, applied in the direction of radio wave reflection/re-radiation, instruments, measuring devices, etc., can solve the problems of insufficient observation information, rank deficiency, unknown, etc. The method is simple and clear, easy to implement, and improves Effects on Solution Stability

Active Publication Date: 2020-04-10
CENT SOUTH UNIV
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a joint multi-pixel PolInSAR vegetation parameter inversion method, terminal equipment and storage medium when there is only single baseline PolInSAR data, which can solve the problem of observation information in the calculation process based on the RVoG model. The rank deficiency problem of unknown parameter solution caused by insufficiency

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  • Vegetation parameter inversion method, terminal equipment and storage medium
  • Vegetation parameter inversion method, terminal equipment and storage medium
  • Vegetation parameter inversion method, terminal equipment and storage medium

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[0041] 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.

[0042] The present invention provides a single baseline polarization interferometric SAR vegetation height retrieval method combined with multiple pixels, such as figure 1 shown, including the following steps:

[0043] Step 1, polarization interference processing;

[0044] This step is mainly to obtain single-baseline full-polarization complex coherence coefficient observations, including registration of the main and auxiliary SAR images covering the vegetation area, flat-earth phase removal, multi-look speckle noise removal, and polarization interference processing. Obtain single-baseline full-polarization complex coherence coefficient observations cov...

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Abstract

The invention discloses a vegetation parameter inversion method, terminal equipment and a storage medium. The method comprises the following steps of: 1, carrying out preprocessing and polarization interference processing on two SAR images so as to obtain a single-baseline complete polarization multi-correlation coefficient observation value; 2, determining the size of a block participating in joint calculation, namely the number of pixel points participating in joint calculation, and setting an initial value of unknown parameter inversion; 3, constructing an observation equation based on thecomplete polarization multi-correlation coefficient of a RVoG model and all pixels; and 4, according to the obtained parameter initial values, carrying out vegetation height inversion by a nonlinear iterative algorithm. According to the invention, the rank deficient problem in application of the RVoG model to invert the vegetation height is solved, and the resolving stability during parameter inversion solving is improved.

Description

technical field [0001] The invention relates to the field of vegetation parameter inversion of polarization interferometric synthetic aperture radar (PolInSAR), in particular to a single baseline polarization interferometric SAR vegetation height inversion method combined with multiple pixels, a terminal device and a storage medium. Background technique [0002] About 32.3% of the earth's land surface is covered by vegetation. Accurate extraction of forest height is of great significance for the study of ecological environment change, global carbon cycle and forest resource management. PolInSAR technology is able to distinguish the phase centers of different scattering mechanisms in one resolution unit, theoretically it can be used to invert the forest height by determining the phase centers of surface scattering and volume scattering. In recent years, the development of PolInSAR has provided an opportunity to extract forest heights on a global scale. [0003] In the field...

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/90G01S13/9027G01S13/9076
Inventor 朱建军张兵付海强李志伟汪长城
Owner CENT SOUTH UNIV
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