Automatic extracting method of urban built-up area border

Abstract

The invention relates to an automatic extracting method of an urban built-up area border, and in particular relates to a method applied to a high-resolution panchromatic remote-sensing image and used for automatically extracting the urban built-up area border, and belongs to the field of urban planning. The method comprises the following steps: firstly performing histogram mean value stretching treatment on the image, and extracting a reasonable edge density area of the urban built-up area based on an edge detection operator, and extracting a textural feature reasonable area based on a gray level co-occurrence matrix and neutral network algorithm, operating the reasonable area with the edge density and the reasonable area of the textural feature to obtain a candidate area of the urban built-up area, finely extracting by using a partitioning density filter method and a mathematical morphology method, and performing smooth treatment on the border by using the mathematical morphology method and extracting the urban built-up area border. The region with a plurality of centers and relatively large space water areas can be effectively treated to make up the insufficiency of an existing method, and the extracted urban built-up border has the high precision.

Description

Technical field [0001] The invention relates to a method for automatically extracting the boundaries of urban built-up areas, in particular, it is applied to high-resolution panchromatic remote sensing images to automatically extract the boundaries of urban built-up areas. The method makes full use of the edges of urban built-up areas in high-resolution panchromatic remote sensing images. The density feature and texture feature effectively realize the extraction of the boundary of the urban built-up area, which belongs to the field of urban planning. Background technique [0002] The scope of urban built-up areas reflects the scale of a city's development, and is a very important indicator in urban planning. The area of ​​urban built-up areas is also the basis for calculating a series of indicators such as population density, public facility level, urban output value per unit area, and urban expansion coefficient. Accurately extracting the boundaries of urban built-up areas is t...

AI Technical Summary

Problems solved by technology

[0004] Traditional urban built-up area boundary extraction methods are either only suitable for panchromatic images with a single center and less open space and water area, or only proved to be effective for low- and medium-resolution remote sensing images, or are too computationally intensive to handle images with multiple centers or High-resolution panchromatic images with large areas of open land and water have certain limitations

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