Method for carrying out inversion on urban area building sedimentation on the basis of morphological gradient

Abstract

The invention relates to a method for carrying out inversion on urban area building sedimentation on the basis of a morphological gradient. The method considers that a building shows strong reflection characteristics and strong conherence in a high-resolution COSMO SkyMED radar image. The method comprises the following steps: firstly, through a correlation coefficient threshold value method based on spectrum statistical properties and an amplitude threshold value method based on back scattering intensity, a high-quality candidate point target is extracted from a high-resolution SAR (Synthetic Aperture Radar) image, and then, a SBAS (Small Baseline Subsets) method is adopted to carry out calculation to obtain the sedimentation information of the point target; an elevation threshold value is set for a result obtained by InSAR (Interferometric Synthetic Aperture Radar) calculation, and the point target on a building is roughly selected; and a morphological gradient method is used for extracting a building boundary in the SAR image, the extracted building boundary is used for removing non building points in the roughly selected point target, and finally, the automatic extraction of the building point target is finally realized. By use of the method, the identification accuracy and reliability of building sedimentation information can be improved.

Description

technical field [0001] The invention relates to a method for retrieving urban building settlement based on morphological gradients, and belongs to the application field of remote sensing technology. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, the construction industry is also developing rapidly. While these tall buildings bring convenience to people's lives, there are also many potential safety hazards. In order to ensure the safety of the building, it is necessary to observe the settlement of the building. [0003] The method represented by InSAR time series analysis technology has greatly enhanced the ability of InSAR technology in urban land subsidence monitoring. With the development of satellite remote sensing technology, high-resolution satellite images such as TanDEM-X, TerraSAR-X and Cosomo-SkyMed radar images can better capture the temporal and spatial settlement characteristics of building...

AI Technical Summary

Problems solved by technology

However, there are still some problems in practical applications, such as the inability to separate the settlement information of buildings and background objects.

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