Method for eliminating shadow interference during urban water body extraction through remote sensing images
A technology for remote sensing images and water bodies, applied in the field of remote sensing, can solve the problem of indistinguishability between urban water bodies and shadows, and achieve the effect of eliminating shadow interference and simplifying the technical process.
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[0064] Embodiment 1: A method for eliminating shadow interference when extracting urban water bodies from remote sensing images of this embodiment is carried out in the following steps:
[0065] (1) Remote sensing image preprocessing: Carry out radiometric calibration and atmospheric correction on the original Landsat 8 image, take Changchun City, Jilin Province as the research area, and crop the image according to the research area to obtain the urban area image;
[0066] (2) Spectral fusion and calculation of MNDWI: In the Landsat 8 image of the urban area, the image of the panchromatic band with a spatial resolution of 15 meters is used for the image of the green band (Green) with a spatial resolution of 30 meters and the spatial resolution Perform spectral fusion for 30-meter short-wave infrared 1-band (SWIR1) images, enhance the spatial resolution of green-band and SWIR 1-band images to 15 meters, and use ENVI5.3 software to calculate and correct the normalized water index...
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