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A Novel Vegetation Index Correction Method Resistant to Terrain Effect and Background Effect

A vegetation index and terrain correction factor technology, applied in the field of data correction, can solve the problems of NIRv being easily affected by terrain, vegetation parameter inversion and monitoring uncertainty, etc., to achieve a strong ability to characterize vegetation structure, improve application potential, Universal effect

Active Publication Date: 2022-05-20
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

However, in mountainous areas with large terrain fluctuations, NIRv is easily affected by the terrain
[0006] Most of the existing vegetation indexes do not consider the influence of terrain, which will bring greater uncertainty to the inversion and monitoring of vegetation parameters in mountainous areas with large terrain fluctuations.

Method used

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  • A Novel Vegetation Index Correction Method Resistant to Terrain Effect and Background Effect
  • A Novel Vegetation Index Correction Method Resistant to Terrain Effect and Background Effect
  • A Novel Vegetation Index Correction Method Resistant to Terrain Effect and Background Effect

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Embodiment Construction

[0024] The principles and features of the present invention are described below, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0025] Such as figure 1 As shown, the following steps are included in this implementation example:

[0026] A Collect remote sensing images and DEM data of vegetation;

[0027] B calculate the slope and aspect from the DEM data, perform atmospheric correction on the remote sensing image, and obtain the surface reflectance;

[0028] C Calculate the vegetation index NIRv and terrain correction factor P corresponding to each pixel according to the slope data and surface reflectance;

[0029] D uses the vegetation index NIRv and the terrain correction factor P as input to calculate the anti-topography vegetation index.

[0030] The reflectance of any pixel with a wavelength of λ can be expressed as the area-weighted sum of the vegetation part and the soil backgr...

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Abstract

The invention discloses a novel vegetation index correction method that is resistant to terrain effects and background effects, including A collecting remote sensing images and DEM data of vegetation; Correction to obtain the surface reflectance; C calculate the vegetation index NIRv and terrain correction factor P corresponding to each pixel according to the slope data and surface reflectance; use the vegetation index NIRv and terrain correction factor P as input to calculate the anti-topography vegetation index. The method for correcting the original vegetation index by introducing a terrain correction factor proposed by the present invention has strong universality, strong resistance to terrain and the ability to characterize vegetation structure, and is expected to further improve the application potential of the vegetation index in mountainous areas.

Description

technical field [0001] The invention belongs to the technical field of data correction, and in particular relates to a novel vegetation index correction method that is resistant to terrain effects and background effects. Background technique [0002] Vegetation index has been widely used in vegetation growth monitoring. However, the vegetation index is easily affected by external factors such as soil background, atmospheric conditions, terrain, illumination, and observation angle. ARVI that suppresses atmospheric effects, EVI that suppresses saturation effects, etc. [0003] Terrain causes significant distortion in remote sensing observations, which brings greater uncertainty to subsequent applications. In order to suppress the terrain effect, a variety of terrain correction methods have been developed, such as cosine correction, SE correction, SCS+C correction, PLC correction, etc. However, the above-mentioned models are all proposed for the spectral reflectance of remot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/84G01N21/552
CPCG01N21/84G01N21/552G01N2021/8466
Inventor 尹高飞陈瑞
Owner SOUTHWEST JIAOTONG UNIV
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