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An automatic coastline extraction and classification method based on satellite images

A classification method and automatic extraction technology, applied in the field of marine surveying and remote sensing, can solve the problems of low efficiency, high manpower and material resources, long working cycle, etc., and achieve the effect of rich image color and automatic fast extraction

Active Publication Date: 2019-07-05
THE CHINESE PEOPLES LIBERATION ARMY 92859 TROOPS
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  • Application Information

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Problems solved by technology

In addition, the operating environment of conventional measurement methods is relatively dangerous and requires a lot of manpower and material resources, low efficiency, long working cycle, and it is difficult to quickly reflect the dynamic changes of the coastline

Method used

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  • An automatic coastline extraction and classification method based on satellite images
  • An automatic coastline extraction and classification method based on satellite images
  • An automatic coastline extraction and classification method based on satellite images

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Embodiment Construction

[0048] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0049] An automatic coastline extraction and classification method based on satellite images, such as figure 1 and figure 2 shown, including the following steps:

[0050] Step 1. After precise registration with the coastal zone area, such as image 3 The multispectral image shown is used as the data source, combined with the NDWI normalized water index and the level set model to obtain the precise outline of the water edge.

[0051] The waterside line refers to the instantaneous intersection line between the undulating sea surface and the land at a certain moment. Its extraction is of great significance for the subsequent study of coastline acquisition, intertidal zone classification and water depth inversion. The essence of waterside line extraction is the sea and land image. segmentation.

[0052] The concrete steps of described step 1 are: ...

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Abstract

The present invention relates to an automatic coastline extraction and classification method based on satellite images, and its technical characteristics include the following steps: Step 1, using the multi-spectral image after accurate registration of the coastal area as a data source, combined with NDWI normalized water The index and level set model obtains the precise outline of the water edge; step 2, object-oriented segmentation of the land area, and extracts the basic unit of coastline coastal features through the spatial position topological relationship of each basic unit; step 3, based on the decision tree for each coastline Determine and classify the basic unit of coastal features; step 4, determine the coastline position according to the coastline interpretation rules; step 5, based on the coastline position results and property information based on the multispectral image in step 4, output the high-resolution panchromatic image coastline vector. The invention can quickly, accurately and comprehensively survey and map the position of the coastline and dynamically monitor its changes.

Description

technical field [0001] The invention belongs to the technical field of marine surveying and remote sensing, and relates to various image processing and analysis technologies, in particular to an automatic coastline extraction and classification method based on satellite images. Background technique [0002] As the dividing line between ocean and land, the coastline is one of the most important topographical elements on land and sea maps, and is listed as one of the 27 most important surface features by the International Geographic Information Committee (IGDC). Coastline measurement is an important part of map surveying, hydrographic surveying, coastal zone survey, coastal evolution research, coast and sea area management, and is also an important basic geographic data. The coastlines mentioned in the present invention all refer to the National Standards of the People's Republic of China [such as "Oceanographic Terminology Marine Geology" (GB / T 18190-2000) \ "Chinese Sea Char...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/46G06K9/62
CPCG06V20/13G06V10/44G06F18/24
Inventor 闸旋滕惠忠申家双李海滨赵健叶秋果王耿峰
Owner THE CHINESE PEOPLES LIBERATION ARMY 92859 TROOPS
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