Regional water body rapid dynamic extraction method combining optics and radar

Abstract

The invention discloses a regional water body rapid dynamic extraction method combining optics and radar. The method comprises the following steps: obtaining optical remote sensing image data of a monitoring region; obtaining radar remote sensing image data of the monitoring area; preprocessing the optical remote sensing image data and the radar remote sensing image data respectively; obtaining aspectral index based on the preprocessed optical remote sensing image data; extracting an optical remote sensing area water body classification map based on the spectral index; based on the optical remote sensing area water body classification map, extracting a radar remote sensing area water body classification map in the preprocessed radar remote sensing image data; and obtaining a monitoring area water body map based on the optical remote sensing area water body classification map and the radar remote sensing area water body classification map. According to the invention, dynamic extractionand monitoring of water bodies in a regional range can be realized.

Description

technical field [0001] The invention relates to the field of water body monitoring, in particular to a method and system for fast and dynamic extraction of regional water bodies combined with optics and radar. Background technique [0002] The dynamic monitoring and identification of regional water bodies is an important basis for flood monitoring and evaluation, regional drought monitoring and early warning, water resource management and scheduling, agricultural irrigation management and other application fields. The dynamic change information of regional water bodies can provide important underlying surface status information for professionals in water conservancy, agriculture, ecology, and natural resources, and provide important support information for auxiliary decision-making. Remote sensing technology has the characteristics of macroscopic, fast, and economical, and is widely used in the monitoring of lake water resources, water environment, and water policy supervisi...

AI Technical Summary

Problems solved by technology

Thirdly, the radar-based water dynamic monitoring method involves the microwave imaging mechanism. Mountain and terrain changes cause some features to be similar to water bodies. The water body extraction method that relies on the threshold method has obvious misjudgment of water bodies.

At present, there is still no method for water body extraction and dynamic monitoring based on remote sensing that can effectively solve large-scale water body extraction and monitoring in complex and non-uniform areas.

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