Method for extracting plane geometric indexes and topological structures of rivers

A technology of plane geometry and topology, applied in image data processing, instrument, character and pattern recognition, etc., can solve problems such as high cost and low efficiency, and achieve the effect of ensuring diversity, strong practicability, and saving manpower and material resources.

Pending Publication Date: 2022-01-28
YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high cost and low efficiency in the process of extracting river plane indicators by traditional on-site measurement means, and under the premise of ensuring the continuity of the extracted river course and the diversity of index data, a new method is proposed. Automatic Extraction Method of River Plane Geometric Index and Topological Structure Based on Complex Network Analysis Technology

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  • Method for extracting plane geometric indexes and topological structures of rivers
  • Method for extracting plane geometric indexes and topological structures of rivers
  • Method for extracting plane geometric indexes and topological structures of rivers

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Embodiment Construction

[0031] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0032] The invention provides a method for extracting the plane geometric index and topological structure of a river, including the extraction of river water bodies, the depiction of the river centerline skeleton, the identification and detection of river branch points and endpoints, and the extraction of river network topological structure and plane geometric index Extract four parts, such as figure 1 As shown, it specifically includes the following steps:

[0033] S1. Determine the input image and calibrate the initial parameters.

[0034] This step specifically includes the following sub-steps:

[0035] S11, the input image format is a satellite image (taking the Landasat satellite image as an example), first determine the resolution of the input image I, and the image size M * N (wherein, M, N are the number of pixel rows and the number of columns ...

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Abstract

The invention discloses a method for extracting plane geometric indexes and topological structures of rivers. The IPC classification number of the method is E02B1 / 00. The method is based on a complex network analysis technology, takes a satellite picture as an input quantity, and is composed of four main parts of extraction of a river channel water body, description of a river center line skeleton, identification and detection of river branching points and end points, and extraction of a river network topology structure and plane geometric indexes. The continuity of the extracted river channel is ensured as much as possible while the influence of a sand dam and the like on the plane form of the river channel is avoided, so that the method also has relatively high applicability to braided rivers, deformed river bays and the like with complex plane forms. A large amount of manpower and material resources cost brought by field measurement is saved, the accuracy and diversity of the obtained data are considered, and technical support is provided for river research.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to an automatic extraction method of a river plane geometric index and topological structure based on complex network analysis technology, and its IPC classification number is E02B1 / 00. Background technique [0002] River systems on Earth often have different planar forms, which are often considered to be closely related to river behavior. One of the main contents of river bed evolution is to study the relationship between the above two. For this reason, it is necessary to define a series of quantitative indicators including channel width, channel length, branch angle, tortuosity and migration rate to distinguish and describe Different river plan forms. Therefore, it has always been one of the hot issues in river research to efficiently and accurately map and evaluate the planar morphology of rivers and extract corresponding geometric indicators fr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06V20/13G06V10/26G06V10/28G06V10/30G06V10/34G06V10/44
CPCG06T5/30
Inventor 刘彦晖江恩慧王远见李军华高梓轩田世民屈博许琳娟来志强张向萍李新杰任智慧闫振峰王子路王欣张翎张世安
Owner YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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