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
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[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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