TSEVI-based forest cover change detection method

A change detection and forest technology, which is applied in the direction of scattering characteristic measurement, instrument, character and pattern recognition, etc., can solve the problems that affect the accurate extraction of forest coverage information, affect the change detection results, etc., and achieve the minimization and visualization of data cost and time cost Good effect and strong operability

Inactive Publication Date: 2019-05-31
FUZHOU UNIV
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Problems solved by technology

Since forests are mainly distributed in mountainous areas with complex terrain, the terrain shadow effect will

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  • TSEVI-based forest cover change detection method
  • TSEVI-based forest cover change detection method
  • TSEVI-based forest cover change detection method

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[0032] In order to make the features and advantages of this patent more obvious and easy to understand, the following specific examples are given together with the accompanying drawings and described in detail as follows:

[0033] Such as figure 1 As shown, the overall process of this embodiment includes the following steps:

[0034] Step S1: TSEVI optimization calculation: Select two phases of optical remote sensing images (Landsat5TM on February 15, 2001 and Landsat8OLI multispectral remote sensing images on February 9, 2016 in Wuyishan Nature Reserve, Fujian Province, China), and calculate TSEVI:

[0035]

[0036] Among them: TSEVI is the topographic shadow elimination vegetation index, B nir is the apparent reflectance data of remote sensing images in the near-infrared band, B r is the apparent reflectance data in the red band of the remote sensing image, and f(Δ) is the adjustment factor, which is calculated by the variation coefficient method;

[0037] Step S2: TSE...

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Abstract

The invention provides a TSEVI-based forest cover change detection method. The method includes the following steps of: TSEVI optimization calculation; TSEVI standardization; ROC_TSEVI (TSEVI change rate) calculation; ROC_TSEVI visualization; and forest growth and loss extraction. According to the TSEVI-based forest cover change detection method of the invention, optical remote sensing images of more than two periods are utilized, the subtle changes (including forest growth and forest loss) of forest cover in complex terrain mountains can be effectively detected without the assistance of otherexternal heterogeneous data required.

Description

technical field [0001] The invention relates to the field of vegetation and environment monitoring, in particular to a method for detecting changes in forest cover based on TSEVI. Background technique [0002] The existing forest cover change detection methods mainly include difference comparison method, post-classification comparison method, spatial model method and so on. Since forests are mainly distributed in mountainous areas with complex terrain, the terrain shadow effect will affect the accurate extraction of forest cover information and ultimately affect the change detection results. Contents of the invention [0003] In view of this, the purpose of the present invention is to provide a forest cover change detection method based on TSEVI, which can eliminate the interference of terrain shadow effects on forest cover information, and can sensitively detect small changes in forest cover. [0004] The present invention specifically adopts the following technical solu...

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Application Information

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IPC IPC(8): G01N21/47G06K9/00
Inventor 江洪
Owner FUZHOU UNIV
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