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Extraction method and system for bedrock coast line

An extraction method and extraction system technology, applied in the field of bedrock coastline extraction, can solve the problems of no extraction results of different membership functions, comparative analysis, scattered distribution, etc., to achieve strong global search capabilities and robustness, Good resolution and extraction and zoom-in, easy to achieve the effect

Active Publication Date: 2018-01-09
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

At present, there are many membership functions that can be used for fuzzy classification, but there is still no definite criterion for solving the problem of bedrock coastline extraction, and there is no relevant comparative analysis of the extraction results of different membership functions.
For fuzzy classification algorithms, the results of classification using commonly used membership functions often face problems such as blurred edges, insufficient local convergence, severe patch fragmentation, and more scattered distributions.

Method used

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  • Extraction method and system for bedrock coast line
  • Extraction method and system for bedrock coast line
  • Extraction method and system for bedrock coast line

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Embodiment Construction

[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0050] refer to figure 1 As shown, it is a flow chart of a preferred embodiment of the method for extracting bedrock coastline provided by Embodiment 1 of the present invention.

[0051] Step S11, using an object-oriented method to perform multi-scale segmentation on the remote sensing image data of the bedrock coastline to be extracted.

[0052] The present invention adopts the classification method of face-to-face objects. The smallest unit processed by the object-oriented classification method is an object composed of multiple pixels containing more semantic information, rather than a single pixel processed by the pixel-oriented classification method. Compared with pixels, objects contain not only spectral information, but also richer semantic information such as geometric information, texture information, topological information...

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Abstract

The invention relates to an extraction method for a bedrock coast line, comprising: based on an object-oriented method, performing multi-scale segmentation on remote sensing image data from which thebedrock coast line is going to be extracted; establishing operating characteristics according to the remote sensing image data after the multi-scale segmentation; establishing a membership functionaccording to the established operating characteristics; setting adiscrimination interval of the membership function for discriminating seawater by using a fuzzy rule, and assigning the membership function by using the discrimination interval; classifying the assigned membership function, and extracting a seawater object to obtain the bedrock coast line. The invention further relates to an extractionsystem for a bedrock coast line. The method and the system have strong global search capability and robustness, can better distinguish, extract and amplify the characteristics useful for classification, and are clear in classification result contour and low in degree of fragmentation of classification results.

Description

technical field [0001] The invention relates to a method and system for extracting bedrock coastline. Background technique [0002] The bedrock coast is an important part of the natural coast, which is usually composed of hard rocks with clear and distinct outer contours, and usually contains protruding headlands, and there are bays deep into the land between the headlands and other natural coastlines. In comparison, the shorelines of bedrock coasts tend to be particularly tortuous and complex. Bedrock coasts are often relatively steep, with very large slopes, and some areas are almost vertical. Therefore, even if the sea tide level changes greatly, the fluctuation of the water boundary line in the horizontal direction of the bedrock coast is not significant. Rocky shoreline extraction has minimal impact. In addition, the rock beach on the offshore side of the bedrock coast has the function of preventing seawater intrusion and corrosion, so the upwash of the spring tide ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62
Inventor 韩宇陈劲松郭善昕张彦南姜小砾
Owner SHENZHEN INST OF ADVANCED TECH
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