Object-oriented high-resolution remote sensing image impermeable layer extraction method

A technology of remote sensing images and extraction methods, which is applied in image enhancement, image analysis, image data processing, etc. Effect

Inactive Publication Date: 2016-01-06
INST OF ELECTRONICS CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide an object-oriented high-resolution remote sensing image impermeable layer extraction method to achieve rapid extraction of impermeabl...

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  • Object-oriented high-resolution remote sensing image impermeable layer extraction method
  • Object-oriented high-resolution remote sensing image impermeable layer extraction method
  • Object-oriented high-resolution remote sensing image impermeable layer extraction method

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Embodiment approach

[0038] According to an embodiment of the present invention, in step S2:

[0039] The formula for calculating the normalized water permeability index of a pixel is:

[0040] Normalized water permeability index = (pixel value in the green band - pixel value in the near-red band) / (pixel value in the green band + pixel value in the near-red band);

[0041] The formula for calculating the normalized impermeability index of a pixel is:

[0042] Normalized impermeability index = (pixel value in the near-red band - pixel value in the red band) / (pixel value in the near-red band + pixel value in the red band).

[0043] The average normalized permeability index for a polygon object is calculated as:

[0044] P g = Σ j ∈ g NDPI j N ...

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Abstract

The invention provides an object-oriented high-resolution remote sensing image impermeable layer extraction method. First of all, by use of an image segmentation technology, object segmentation of a remote sensing image is realized, a homogenous area is segmented into the same polygonal object, a normalization waterproof impermeability index and a normalization permeability index are extracted for the remote sensing image, an NDIPI graph and an NDPI graph are respectively obtained, by use of a permeability determination rule, permeability attribute interpretation of a segmentation object is realized, aggregation of impermeable objects is realized by use of an aggregation technology, and an impermeable layer of the remote sensing image is obtained. According to the invention, an impermeable area is rapidly extracted, the problems of too many terrain details, difficult terrain classification and the like of a high-resolution image are solved, and the extraction precision of the impermeable layer is greatly improved.

Description

technical field [0001] The invention belongs to the field of remote sensing image processing, in particular to an object-oriented high-resolution remote sensing image impermeable layer extraction method. Background technique [0002] As the area with the most population accumulation and the most intense human activities, the city's environment and climate have attracted increasing attention; the expansion of the city has directly changed the state of land cover and land use, and also directly affected the local climate, ecology and environment. Impervious surfaces, as an important index in the evaluation of urbanization process and urbanization rate, are of great significance to the analysis and evaluation of climate, environment and water cycle in urban areas. The impervious layer is considered as an important environmental assessment indicator and is widely used in the comprehensive urban assessment process. [0003] Impervious surfaces are natural or man-made substances ...

Claims

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Application Information

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IPC IPC(8): G06T7/00
CPCG06T2207/10032
Inventor 徐成华宋雨娇戴龙魏育成
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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