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Method for extracting wetland information based on combination of NDVI and LSWI

A technology of information extraction and combination, which is applied in the field of wetland information extraction based on the combination of NDVI and LSWI, can solve the problems that affect the extraction of wetland information and do not take wetland information into account, and achieve the effect of efficient extraction

Inactive Publication Date: 2014-05-07
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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Problems solved by technology

[0004] In order to solve the problem that the existing wetland information extraction method is concentrated on the basis of wetland spectral characteristics, the present invention does not take into account that wetland information changes with the seasons, and is limited by spectral information, which affects the extraction of wetland information; and further provides a method A wetland information extraction method based on the combination of NDVI and LSWI

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  • Method for extracting wetland information based on combination of NDVI and LSWI
  • Method for extracting wetland information based on combination of NDVI and LSWI
  • Method for extracting wetland information based on combination of NDVI and LSWI

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specific Embodiment approach 1

[0034] Specific implementation mode one: as Figure 1~2 As shown, the specific implementation of the technical solution of the present invention will be described in conjunction with the following examples, and the west of Jilin is selected as the experimental area for analysis (the wetland information in the extracted area in 2012 is explained), figure 1 The specific steps of the wetland information extraction method based on the combination of NDVI and LSWI are described.

[0035] (1) Obtain initial remote sensing image data and preprocess the data;

[0036] Download and acquire TM images covering western Jilin, and perform geometric correction on the images. The geometric registration of the original TM images was performed by quadratic polynomial method.

[0037] (2) Calculate NDVI (normalized difference vegetation index) and LSWI (humidity index) using the processed remote sensing image data;

[0038] The calculation method of NDVI is:

[0039] NDVI=(NIR-R) / (NIR+R) fo...

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Abstract

The invention discloses a method for extracting wetland information based on combination of an NDVI and an LSWI, and relates to the technical field of wetland information extraction. In order to solve a problem that an existing method for extracting the wetland information is realized on the basis of focusing on wetland spectral features without taking variations in wetland information along with the season into consideration, thereby affecting extraction of the wetland information. The method specifically comprises the steps of processing original remote sensing and geographic base data; calculating the NDVI and the LSWI according to the remote sensing data; constructing a wetland information extracting model according to decision making of the model to realize extraction of the wetland information; and evaluating the precision of the wetland information extraction of the model disclosed by the invention through comparing the method with other information extraction methods. The method is maximally characterized by fully utilizing the NDVI and the LSWI, and capable of realizing extraction of the wetland information without being restricted by seasons. The method disclosed by the invention realizes extraction of the wetland information effectively, simply and conveniently, and the results can provide data support and scientific basis for effectively carrying out wetland drafting and monitoring and planning, protecting and managing the wetland ecological environment.

Description

technical field [0001] The invention relates to the technical field of wetland information extraction, in particular to a wetland information extraction method based on the combination of NDVI and LSWI. Background technique [0002] In recent years, the degree of inconsistency between the stability of the ecological environment and the development of human society has increased significantly, which has caused a series of ecological environmental problems, such as the degradation and fragmentation of wetlands caused by natural and human factors, which have seriously affected the security of the ecosystem. Wetlands are an important part of important ecosystems and play an important role in maintaining the stability of ecosystems. However, the high-intensity agricultural development of human beings has seriously damaged the wetland environment, and at the same time, it has also caused great pressure on the wetland ecological environment. Therefore, in order to restore the stab...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06K9/46
Inventor 董张玉王宗明刘殿伟任春颖贾明明丁智
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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