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InSAR ground point extraction method and device in complex city environment, server and storage medium

An urban environment and extraction method technology, applied in the field of geographic information, can solve the problem of low accuracy of InSAR ground point extraction, and achieve the effect of accurate extraction

Active Publication Date: 2020-09-25
天津市滨海新区水务局 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a method, device, server, and storage medium for extracting InSAR ground points in a complex urban environment, so as to solve the technical problem of low accuracy of InSAR ground point extraction in complex urban environments such as cities in the prior art

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  • InSAR ground point extraction method and device in complex city environment, server and storage medium
  • InSAR ground point extraction method and device in complex city environment, server and storage medium
  • InSAR ground point extraction method and device in complex city environment, server and storage medium

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Embodiment 1

[0071] figure 1 It is a schematic flow diagram of the method for extracting InSAR ground points in a complex urban environment provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation of extracting InSAR ground points in a complex geographical environment, especially in an urban environment. InSAR ground point extraction device is implemented, and can be integrated in the geographic information server, specifically includes the following steps:

[0072] S110, use the DLG data to filter the InSAR data.

[0073] DLG is a digital line map, which is a vector data set stored hierarchically on basic geographic elements on existing topographic maps. DLG includes both spatial information and attribute information.

[0074] Digital Line Map (DLG) is a vectorized data file formed by vectorizing one or more map elements in each map after scanning and geometric correction.

[0075] DLG uses points, lines, and planes to describe the geometric fea...

Embodiment 2

[0105] figure 2 It is a schematic flowchart of the method for extracting InSAR ground points in a complex urban environment provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the above-mentioned embodiments. In this embodiment, the rough extraction of InSAR data is realized based on the statistical analysis of low ground features and local elevations. The specific optimization is: calculate the data point prediction in InSAR data Set the statistical value of the elevation data within the range; use the production rule to compare the relationship between the statistical value of the elevation data and the preset threshold, and if it is judged to be less than the relationship, then determine that the data point is a data point after rough extraction.

[0106] Correspondingly, the method for extracting InSAR ground points in a complex urban environment provided in this embodiment specifically includes:

[0107] S210. Use the DLG data...

Embodiment 3

[0116] image 3 It is a schematic flowchart of the method for extracting InSAR ground points in a complex urban environment provided by Embodiment 3 of the present invention. This embodiment is optimized on the basis of the above-mentioned embodiments. In this embodiment, the rough extraction of InSAR data based on terrain features and linear prediction is finely extracted. The specific optimization is: use the linear prediction model to determine the InSAR data The probability of the ground point; select the InSAR data point with a higher probability of the ground point according to the probability; perform fine extraction based on the terrain feature according to the InSAR data point with a higher probability of the ground point.

[0117] Correspondingly, the method for extracting InSAR ground points in a complex urban environment provided in this embodiment specifically includes:

[0118] S310, performing InSAR data filtering based on the features of tall and large objects...

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Abstract

The embodiment of the invention discloses an InSAR ground point extraction method and device in a complex city environment, a server and a storage medium, and the method comprises the steps: carryingout the filtering of InSAR data through DLG data; performing rough extraction of InSAR data based on low terrain features and local elevation statistics; and performing fine extraction on the InSAR data after coarse extraction based on topographic features and linear prediction. Accurate extraction of InSAR ground points can be realized in a complex geographical environment, especially in an urbanenvironment.

Description

technical field [0001] The invention relates to the technical field of geographic information, in particular to a method, device, server and storage medium for extracting InSAR ground points in a complex urban environment. Background technique [0002] Radar satellite is a general term for earth observation remote sensing satellites carrying synthetic aperture radar (SAR). SAR is an active microwave sensor with the characteristics of all-weather and all-day work, and has been widely used in many disciplines. InSAR technology uses SAR images of multiple scenes in the same area, through statistical analysis of the returned phase and amplitude information, to find point targets that are not affected by temporal and spatial baseline decorrelation and atmospheric changes. [0003] However, in cities, there are usually a large number of ground objects, such as tall buildings and low vegetation, which seriously affect the accuracy of InSAR ground point extraction. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46
CPCG06V10/462Y02A30/60
Inventor 徐廷云李振河杨魁徐骏千李时博邢恩文孙铁孙培周
Owner 天津市滨海新区水务局
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