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A method and system for extracting coastline secondary types based on multi-scale features

A multi-scale feature and coastline technology, applied in the direction of instrumentation, scene recognition, calculation, etc., can solve the problems of uncertainty, low efficiency and low accuracy of secondary classification

Active Publication Date: 2021-09-24
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0003] Aiming at the shortcomings of not considering the uncertainty in the coastline extraction process and the low efficiency and accuracy of the secondary classification, the present invention provides a method and system for extracting the secondary types of coastlines based on multi-scale features. The method includes the following steps:

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  • A method and system for extracting coastline secondary types based on multi-scale features
  • A method and system for extracting coastline secondary types based on multi-scale features
  • A method and system for extracting coastline secondary types based on multi-scale features

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[0050] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The overall flowchart of the method used in this embodiment is shown in figure 1 . First, obtain the initial coastline image map to determine the coastline, and propose an uncertainty-considering coastline position location method (uncertainty-considering coastline detection, UCCD). Spectral difference, the water body index calculation results in this embodiment see figure 2 , normalize the calculation results of the water body index in the image map, and perform histogram statistics to obtain the histogram distribution of pure land pixels, uncertain pixels, and pure water body pixels. For the statistical histogram results of the normalized water body index, see Figure 3(a), the mixed pixel extraction results (white part) are shown in Figure 3(b)...

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Abstract

The invention discloses a method and system for extracting secondary types of coastlines based on multi-scale features. The method adopted includes obtaining the coastline image map, determining the coastline position through the coastline position positioning method that takes into account the uncertainty, and obtaining the coastline position result image and the water and land segmentation result image, and through the coastline extraction algorithm based on multi-scale features, it is realized in the secondary type Coastline classification and extraction on a scale; the algorithm considers the geometric and spatial structure characteristics of the coastline scale invariance, the present invention can take into account the uncertainty factors well, obtain a more accurate coastline position, and extract the geometric features of the coastline scale invariance and spatial structure features to realize the extraction of the secondary type of coastline, which is more efficient and more accurate.

Description

technical field [0001] The invention belongs to the field of coastline extraction, and relates to a method and system for extracting secondary types of coastlines based on multi-scale features. Background technique [0002] As a direct reflection of urban development and human activities, the coastline of an urban area is of great significance and value to the development drive of coastal cities, the degree of development of the coastal zone, and the ecological environment of the coastal zone. Due to complex and frequent human activities and urban development needs, complex artificial coastlines have become the main type of coastlines in coastal cities. The extraction and classification of coastlines and the analysis of temporal and spatial changes are the focus of current research. At present, coastline extraction methods mainly include threshold segmentation method, edge detection method, target-based region growth method, supervised classification method, etc., to separa...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/46G06K9/62
CPCG06V20/13G06V10/44G06V10/50G06F18/24
Inventor 宋妍艾烨霜
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)