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High-resolution permanent scatterer modeling method for separation of building and background

A permanent scatterer and modeling method technology, which is applied in the field of permanent scatterer modeling and parameter estimation, can solve problems such as affecting the accuracy of building deformation information extraction, and achieve the effects of small elevation errors, reduced influence, and small deformation rate values.

Active Publication Date: 2014-08-06
HANGZHOU NORMAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

At the same time, considering that the building elevation phase and deformation phase are easily mixed together, if the building elevation cannot be accurately calculated, it will directly affect the extraction accuracy of building deformation information

Method used

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  • High-resolution permanent scatterer modeling method for separation of building and background
  • High-resolution permanent scatterer modeling method for separation of building and background
  • High-resolution permanent scatterer modeling method for separation of building and background

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Experimental program
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Embodiment

[0021] Embodiment: a kind of high-resolution building of this embodiment and the permanent scatterer modeling method of background separation, such as figure 1 shown, including the following steps:

[0022] S01, separating the PS points on the buildings and background features;

[0023] S02, the PS points on the buildings and background features are independently constructed;

[0024] S03. Estimating the elevation and deformation parameters of PS points on the building to obtain a final deformation map.

[0025] 1. Separation of PS points on buildings and background features

[0026] The present invention adopts an object-oriented classification method to realize the separation of PS points on buildings and background features. The whole classification method is as follows: first, the image is segmented according to the adjacent pixel grayscale and texture on the adjacent SAR image, using An edge-based segmentation algorithm that is fast to calculate and can produce multi-sca...

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Abstract

The invention discloses a high-resolution permanent scatterer modeling method for separation of a building and a background. The method comprises the steps that firstly, PS points on the building are separated from PS points on a background ground object; secondly, networks are constructed independently for the PS points on the building and the PS points on the background ground object; thirdly, elevation and deformation parameters of the PS points on the building are estimated, and then a final deformation graph is obtained. By means of the scheme, the elevation error is small, the deformation rate value is small, the influence of a high-phase gradient on solution of the elevation and deformation of the building is effectively lowered, and the method is suitable for telemetering modeling in a high-resolution urban environment.

Description

technical field [0001] The invention relates to the field of microwave radar remote sensing imaging, in particular to a permanent scatterer modeling and parameter estimation method for separating buildings and background objects in an urban environment under high-resolution conditions. Background technique [0002] Synthetic Aperture Radar Interferometry (InSAR) technology is a microwave radar remote sensing technology developed in recent years. As an extension of InSAR technology, D-InSAR, that is, differential synthetic aperture radar interferometry, uses radar images acquired by satellites passing through the same area twice to perform differential interference to extract land subsidence information. The advantage of D-InSAR technology is that it can collect radar images around the clock. Theoretically, the accuracy of D-InSAR technology for land subsidence monitoring can reach millimeter level. The main limitations of D-InSAR technology are time decoherence, space decoh...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 张登荣王洁周立凡
Owner HANGZHOU NORMAL UNIVERSITY
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