A method and system for extracting building areas based on sar images

An extraction method and technology for built-up areas, applied in the field of remote sensing, can solve the problem of inability to obtain the distribution of built-up areas, and achieve the effect of low misjudgment rate and high extraction accuracy
CN108830203BActive Publication Date: 2022-03-08AEROSPACE INFORMATION RES INST CAS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AEROSPACE INFORMATION RES INST CAS
Publication Date
2022-03-08

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Abstract

The present invention provides a method and system for extracting a building area based on a SAR image. The method for extracting a building area based on a SAR image includes: acquiring a first image based on a SAR image; generating a local spatial index image and a variogram based on the first image image; based on the local space index image, variogram image, and the first image, respectively filter the sampling points to obtain the corresponding sets; process the sampling points in each set according to the preset growth criteria to construct the images of the building areas to be selected, and divide each Select the image of the built-up area to superimpose to obtain the final image of the built-up area. The method or system provided by the invention can quickly and accurately extract building areas from Sentinel-1 SAR images, realize automatic extraction of building land in large areas, and lay a foundation for global building area mapping.
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Description

technical field

[0001] This application relates to the field of remote sensing, in particular to a method and system for extracting building areas based on SAR images. Background technique

[0002] Research shows that 66% of the world's population will live in urban areas by 2050. Although urban areas occupy only a small fraction of the global landmass, they largely influence ecological changes due to their concentration of traffic and energy consumption. Therefore, accurate and timely acquisition of building land information is of great significance for urban planning and post-earthquake disaster relief.

[0003] Optical remote sensing satellites provide valuable data sources for building land extraction, but compared with optical sensors, radar systems have the characteristics of all-weather and all-weather observation and imaging. SAR data has a wider application space. Although the interpretation of SAR images is difficult, many scholars have carried out research on t...

Claims

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