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System and method for remote sensing automatic extraction of large-scale water body information based on rules

A technology for automatic extraction of water body information, applied in the field of information processing, can solve the problems of decreased analysis efficiency, failure to disclose a large range of water body information, and the accuracy of information extraction with a lot of labor and labor, and achieves the effect of high precision and accurate extraction.

Active Publication Date: 2017-06-16
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Description
  • Claims
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Problems solved by technology

[0004] In the prior art, there is no disclosed technical solution that can solve large-scale water body information extraction. In the process of data research and analysis, technicians in related fields can only use specific extraction algorithms for specific areas to analyze or use manual methods to complete water body information extraction. Information extraction, analysis efficiency is greatly reduced, and a lot of manpower is required at the same time, and the accuracy of information extraction is low

Method used

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  • System and method for remote sensing automatic extraction of large-scale water body information based on rules
  • System and method for remote sensing automatic extraction of large-scale water body information based on rules
  • System and method for remote sensing automatic extraction of large-scale water body information based on rules

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Embodiment 1

[0048] figure 1 Shown is a flow chart of the method for automatic remote sensing of large-scale water body information based on rules according to the present invention. First, the system loads remote sensing image data, wherein any film or photo that only records the size of electromagnetic waves of various ground objects is called remote sensing. Image, in remote sensing, mainly refers to aerial photos and satellite photos. After the system finishes loading the image, it performs preliminary preprocessing on the image data. The preprocessing here mainly includes geometric correction, image registration and image enhancement.

[0049] Geometric correction: During remote sensing imaging, due to the influence of factors such as the attitude, altitude, speed, and earth rotation of the aircraft, the image is geometrically distorted relative to the ground target. The error correction for geometric distortion is geometric correction. It usually refers to the correction and elimin...

Embodiment 2

[0073] Such as figure 2 Shown is the rule set query interface diagram, including query time period, query watershed, query administrative area, query custom area and query coordinate range. The start time is January 1, 2000, and the end time is September 2, 2014; the query basin is Taihu Lake; the query administrative region is Heilongjiang Province; the query coordinate range is minimum longitude 75 maximum longitude 135, minimum dimension 4 maximum Dimension 53. Query result matching rules and corresponding rule expressions such as image 3 As shown, the water (water body) rule number 13, the expression is ( MEAN_L4 - MEAN_L2) / ( MEAN_L4 + MEAN_L2) 29.7; cloud (cloud) rule number 13, the expression is ( MEAN_L3 + MEAN_L2 + MEAN_L1) / 3 > 800.

[0074] In this embodiment, the corresponding rule set for automatic matching is obtained by inputting relevant image acquisition information. The rule set completes the feature extraction of water body information through corres...

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Abstract

The invention relates to a rule-based remote-sensing automatic extraction system and method of wide-range water body information. The system comprises a data loading module, a preprocessing module, an image segmentation module, a rule retrieval module and an information extraction module. The method comprises the following steps: loading remote-sensing data; preprocessing the loaded remote-sensing data; carrying out multi-scale segmentation to the preprocessed data; extracting a rule in a water body information rule set; and according to a water body information extraction rule, finishing the automatic information extraction of data subjected to the multi-scale segmentation. The invention comprehensively considers the spectral features and the texture features of the water body as well as relevant features between the water body and surrounding surface features in a surface feature recognition process, and more conforms to the thinking model of people during surface feature recognition, and information extraction precision is high. According to a water body information rule screening principle, an optimal rule suitable for current image data water body information extraction is matched, and the wide-range water body information under different time and geographic and geological conditions can be accurately extracted.

Description

technical field [0001] The invention relates to the technical field of information processing, in particular to a rule-based remote sensing automatic extraction system and method for large-scale water body information. Background technique [0002] Water body information extraction is an important means of water resources investigation, macroscopic monitoring of water resources, disaster forecasting and wetland protection. It is also a prerequisite for building hydrological models, hydrological simulations and other related research. At the same time, good water body information extraction results can provide the best data processing and business analysis for water conservancy professionals. [0003] The existing remote sensing image water body extraction methods are mainly divided into the following four categories: feature segmentation methods, pattern classification methods, contour line detection methods and multi-source data comprehensive analysis methods. Feature segm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00G06T7/11
Inventor 李小涛黄诗峰李蓉辛景峰李琳
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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