Method and device for identifying black and smelly water

Abstract

The invention provides a method and a device for identifying black and smelly water. The method comprise the following steps: preprocessing an initial high-spatial-resolution remote sensing image to obtain a preprocessed high-spatial-resolution remote sensing image; extracting each pixel of the water from the preprocessed high-spatial-resolution remote sensing image, and obtaining Rayleigh scattering reflectivity of blue light band, Rayleigh scattering reflectivity of green light band and Rayleigh scattering reflectivity of red light band of each pixel of the water; calculating BOI index valueof each pixel according to the Rayleigh scattering reflectivity of blue light band, the Rayleigh scattering reflectivity of green light band, the Rayleigh scattering reflectivity of red light band and a preset BOI index model; comparing the BOI index values with a preset threshold value to determine the black odor level of each pixel in the water. Thus, the black and smelly water is identified with a remote sensing technology on the basis of the Rayleigh scattering reflectivity of different bands and the BOI indexes without accurate atmospheric correction.

Description

technical field [0001] The invention relates to the field of identification of black and odorous water bodies, in particular to an identification method and device for black and odorous water bodies. Background technique [0002] Urban black and odorous water body refers to the general term for unpleasant colors and / or unpleasant odors in urban construction areas. Urban black and odorous water bodies are generally dark black, dark gray, dark brown, yellowish brown and gray green, etc. . Urban black and odorous water not only seriously damages the ecosystem of urban water system, but also seriously affects the health and quality of life of residents. [0003] At present, with the development of remote sensing technology, remote sensing monitoring has realized low-cost and high-efficiency monitoring of rivers, and my country's remote sensing monitoring technology has reached the sub-meter level, and it also has monitoring capabilities for relatively small rivers. Therefore, R...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the commonly used atmospheric correction reflectance R rs To identify the black and odorous degree of water body, however, the atmospheric correction reflectance R rs Accurate atmospheric correction is required to achieve accurate atmospheric correction, and accurate atmospheric correction requires measured aerosol optical depth data

However, at present, remote sensing technology for blue, green, red, and near-red band satellites does not have a good atmospheric correction method, and it is difficult to achieve accurate atmospheric correction, which increases the difficulty of identifying black and odorous water bodies through remote sensing technology

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