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Remote sensing image water body identification and extraction method

A technology of remote sensing images and water bodies, applied in scene recognition, character and pattern recognition, instruments, etc., to achieve good precision, simple operation, and overcome the limitations of extraction

Active Publication Date: 2018-09-21
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0011] The technical problem to be solved by the present invention is how to design a solution that can quickly realize the one-time intelligent water extraction of all scales and above in a large-scale multi-water body area

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  • Remote sensing image water body identification and extraction method
  • Remote sensing image water body identification and extraction method
  • Remote sensing image water body identification and extraction method

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Embodiment Construction

[0048] The present invention extracts water body information from data with only RGB bands, and proposes a water body tracking identification and extraction algorithm for the phenomenon of large-scale multi-water body regions, so as to realize the one-time intelligent identification and extraction of water body information of all water bodies above the scale in large-scale multi-water body regions. Overcome the limitations of single water body remote sensing retrieval extraction. The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0049] Such as figure 1 As shown, a kind of remote sensing image water body identification extraction method provided by the present invention comprises the following steps:

[0050] Step S10, considering that the remote sensing image used may not have a near-infrared band, it is first necessary to use RGB values ​​to binarize the remote sensing image to obtain a binarized i...

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Abstract

The invention discloses a remote sensing image water body identification and extraction method which comprises the following steps: performing binaryzation on a remote sensing image by utilizing an RGB value so as to obtain a binary image; traversing the binary image, taking spectral information of each pixel point as a characteristic quantity, judging to obtain pixel points belonging to the waterbody, and taking the pixel points as seed points; tracking pixel points which are the same as the spectral information of the pixel points based on a 4-neighbourhood method of each seed point, and labeling the seed points and the pixel points which are the same as the spectral information; performing automatic chain code identification on the same pixel point, obtaining multiple water body areaswith different identifiers, and realizing simultaneous identification and extraction of integrated multi-water-body information in a large-scale multi-water-body area. According to the method disclosed by the invention, the water bodies of all scales are intelligently and independently identified and extracted in the large-scale multi-water-body area at a time, remote sensing inversion extractionlimitation of a single water body is overcome, the extraction efficiency is high, the operation is simple, and the accuracy is excellent.

Description

technical field [0001] The invention relates to water body information extraction technology, in particular to a method for remote sensing image water body identification and extraction. Background technique [0002] Water is an important part of the ecosystem. The ability to quickly and accurately extract water body information has an important impact on water resource allocation, flood control and drought relief, and environmental detection. [0003] With the development of remote sensing technology, the resolution of remote sensing images is getting higher and higher, and the methods of water body information extraction are becoming more and more diverse. There are roughly the following categories: [0004] (1) Pixel-based water body information extraction for low-resolution images, such as supervised classification, maximum likelihood method, etc.; [0005] (2) The method of setting the threshold value by single band is used to extract the water body information; [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/34G06K9/20
CPCG06V20/13G06V10/22G06V10/267
Inventor 桑学锋翟正丽王建华王浩戴继光赵勇柳长顺杨梅吴娟
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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