Water body remote sensing identification method based on U-net

Abstract

The invention discloses a water body remote sensing identification method based on U-net. The method comprises the following steps: A, carrying out data collection and preprocessing; b, carrying out preliminary extraction of a water body; c, processing a water body extraction result; d, making training and verification samples; e, training a U-net neural network model; and f, extracting water body. Two water body preliminary extraction algorithms are set through spectral analysis of different ground objects in each wave band of an image, all water bodies and part of other ground objects can beextracted, and a public truth value area, namely a preliminary water body result, is reserved. Classification post-processing, format conversion, modification, training and verification sample makingare carried out on an extraction result, a model is obtained through training of a U-net neural network model, and a water body is predicted. The method is suitable for regions with complex surface structures, is simple to operate and high in universality, can better eliminate interference of shadows, buildings and farmlands in the field steeping period, has a good extraction effect on small lakes and small ponds, and realizes accurate extraction of water bodies.

Description

Technical field [0001] The invention relates to a method for extracting water bodies using satellite remote sensing images, in particular to a method for using U-net to perform water body remote sensing recognition. Background technique [0002] About 70% of the earth's surface is covered by water. Water is not only a resource, but also an environmental factor. Water bodies mainly include rivers, lakes, ponds, reservoirs, channels, etc. With the continuous development of economy, the demand for the living environment of mankind is increasing. Due to the combined effect of people's production activities and climate change, the water environment has undergone tremendous changes. People are paying more and more attention to the monitoring, management and analysis of water resources. Satellite remote sensing technology plays an important role in many fields such as resource survey, environmental monitoring, disaster prevention and mitigation with many advantages such as macroscopic,...

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Problems solved by technology

[0006] Therefore, for the areas affected by mountains, buildings, cloud shadows, cultivated land in the soaking period, and water extraction in areas with small lakes and ponds, the above methods have serious errors and omissions.

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