Water body extraction method based on red light-near infrared spectrum feature space
A near-infrared spectrum and feature space technology, which is applied in the field of water body extraction based on the feature space of red light-near-infrared spectrum, can solve problems such as the failure to form a remote sensing monitoring method for surface water bodies, and achieve universal applicability and avoid inapplicability Effect
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[0022] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and examples of implementation.
[0023] Using the NIR and Red band reflectance data of the OLI image in the case area (Hongjiannao) to construct the NIR-Red spectral feature space ( figure 1 b). figure 1 a is the spectral curves of four typical features of vegetation, water, bare soil, and buildings in each band of the TM image in the study area. It can be seen that the reflectance of vegetation has a reflection peak in the near-infrared band, the reflectance of bare soil, buildings, and sand increases with the increase of wavelength, and the reflectance of water is lower than that of the other four ground features in each band. . Therefore, in the NIR-Red spectral feature space, the water body ( figure 1 The circle part in b) is in the area closest to the coordinate origin O, and other objects with certain reflection capabilities are in the...
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