A method for identifying urban black and odorous water bodies based on remote sensing spectrum

Abstract

The invention discloses a method for identifying urban black and odorous water bodies based on remote sensing spectra, comprising the following steps: step S1: acquiring remote sensing spectral data of points to be identified on the water surface; step S2: data preprocessing; step S3: extracting images to distinguish black and odorous water bodies Features, the distinguishing features of black and odorous water bodies include extracting the angle at the green band (Green) and the red band (Red) in the relationship between remote sensing reflectance and wavelength, and the angle at the green band (Green) is α. 1 , the angle at the red band (Red) is α 2 ; Step S4: preset angle α 1 and α 2 The interval of black and odorous water is judged. The invention provides a new method for identifying urban black and odorous water bodies. The angle α between the green band and the red band in the relationship between the reflectivity and wavelength of remote sensing 1 and α 2 The size of is characterized, and α is calculated by the formula 1 and α 2 The size of the angle, and according to the set α 1 and α 2 This method can identify black and odorous water bodies through remote sensing technology, and has promotion value.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image processing, and in particular relates to a method for identifying urban black and odorous water bodies based on remote sensing spectrum. Background technique [0002] Black and odorous water is a water body that has lost its ecological function, mainly formed by excessive water pollution. The black and odorous river water is characterized by abnormal smell and color, reduced aquatic life, and serious deterioration of the structure and function of the river ecosystem. With the acceleration of urbanization, black and odorous water bodies have received more and more attention internationally, especially in China. [0003] At present, the identification of black and odorous water bodies in my country is mainly in the form of questionnaires based on human subjective judgments and evaluation indicators based on water quality testing data. Although these methods can accurately judge whethe...

AI Technical Summary

Problems solved by technology

Although these methods can accurately judge whether the water body is black and smelly, they need to consume a lot of manpower, material and financial resources, and it is difficult to find out in time and supervise at any time

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