Vegetation index construction method applied to city

A technology of vegetation index and construction method, applied in special data processing applications, electrical digital data processing, instruments, etc., can solve the problem of not considering the impact of building land and water bodies, and achieve the elimination of atmospheric or soil background influences and building land use. and water body influence, inhibit the effect of building land and water body information

A technology of vegetation index and construction method, applied in special data processing applications, electrical digital data processing, instruments, etc., can solve the problem of not considering the impact of building land and water bodies, and achieve the elimination of atmospheric or soil background influences and building land use. and water body influence, inhibit the effect of building land and water body information

CN102708307AInactive Publication Date: 2012-10-03SHANGHAI UNIV
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  • Vegetation index construction method applied to city

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Embodiment Construction

[0042] A kind of vegetation index construction method that is applied to city of the present invention, this method comprises the following steps:

[0043] (1) Radiometric correction of remote sensing images, such as figure 1 In â‘ , different degrees of radiation correction are performed according to the conditions of the acquired urban optical remote sensing images. If there are radiance calculation parameters, such as the Gain and Bias parameters of each band of the sensor, the remote sensing data can be calculated from the DN value of the remote sensing image data. The radiance value of the image; if there are further calculation parameters about the surface reflectance, the surface emissivity of the remote sensing image can be further calculated, and the radiation correction can improve the final retrieval accuracy of the terrain correction vegetation index. Therefore, the first step is based on the remote sensing image According to the specific situation, the result of su...

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Abstract

The invention discloses a vegetation index construction method applied to a city. The method comprises the following steps of: (1) performing radiation correction at different degrees according to acquired city optical remote sensing image data, and thus acquiring city remote sensing image data which is subjected to the radiation correction; (2) performing geometrical fine correction, embedding and cutting preprocessing on the city optical remote sensing image data which is subjected to the radiation correction, and thus acquiring a preprocessed city remote sensing image; and (3) calculating the vegetation index IVI of the preprocessed city remote sensing image. By the method, the influence of city building land and water bodies can be well restrained, vegetation information can be enhanced, and the method is suitable for remote sensing image data acquired by a sensor without ground scaling parameters. A city vegetation index constructed by the method can accurately, quickly and precisely reflect the vegetation information of the city.

Description

technical field [0001] The invention relates to a method for constructing a vegetation index applied to cities. Background technique [0002] Urban land use types are very complex. Vegetated land is the most important member of the urban ecological environment system, and changes in its area and distribution will have a significant impact on the urban ecological environment. Therefore, it is of great significance to accurately obtain and understand the vegetation information and its spatial distribution characteristics in the city, and quantitatively study its impact on the urban ecological environment. . Due to the high density and complex landforms of urban vegetation in optical remote sensing images, the accuracy of remote sensing quantitative inversion of urban vegetation information is seriously affected. [0003] The current inversion of optical remote sensing vegetation information mainly adopts the method of vegetation index. The most commonly used vegetation inde...

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Application Information

Patent Timeline
03 Oct 2012
Publication
CN102708307A
IPC
G06F19/00
Inventors
谢亚楠; 刘文渊