Indirect urban high-resolution impervious surface extraction method

Abstract

The invention discloses an indirect urban high-resolution impervious surface extraction method, comprising the following steps: S1, constructing a conceptual calculation model for indirectly extracting a high-resolution impervious surface of a city, wherein the principle of the conceptual calculation model is to obtain the impervious surface indirectly by removing the background surface other thanthe impervious surface in an urban area; S2, obtaining a high-resolution remote sensing image of the urban area; S3, selecting the training sample and the accuracy verification data set; S4, extracting the background surface of the impervious surface of the urban area by using the high-resolution remote sensing image and the training sample according to the conceptual calculation model proposed in the step S1; S5, synthesizing the background surface of the impervious surface according to the result of the step S4, using the background surface as a mask in the entire urban area, and the remaining part as the impervious surface, so as to indirectly obtain the high-resolution urban impervious surface extraction result; and S6, performing the accuracy verification of the impervious surface indirect extraction result in the accuracy verification data set.

Description

technical field [0001] The invention relates to an impermeable surface extraction method, in particular to an indirect urban high-resolution impermeable surface extraction method, which belongs to the field of remote sensing image processing and geographic space information extraction. Background technique [0002] Urban impervious surfaces are generally defined as man-made surfaces that prevent surface water from seeping into bare soil, including buildings, roads, parking lots, and sidewalks. The impermeable surface can represent the prosperity and development of the city, and it is an important symbol of the degree of urbanization and an important indicator of the urban environment. [1] . Different from the natural surface, the impermeable surface changes the flow of water, air, bare soil, heat and other material and energy flows in the city, and promotes the formation of a unique urban ecosystem [2] . The increase of impermeable surface changes the natural runoff proce...

AI Technical Summary

Problems solved by technology

Most of these methods directly extract the impervious surface according to its spectrum, shape, texture and other characteristics. However, since the impervious surface is a broad land cover type with many sub-categories, in high-resolution remote sensing images, The impervious surface is affected by factors such as paint color, surface type, material, shape, and illumination, resulting in a large spatial heterogeneity and spectral variability, resulting in low extraction accuracy of the impervious surface [4]

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