Coastline detection method based on regional active outline model

Abstract

The invention proposes a coastline detection method based on a regional active outline model, and the method has the following steps: employing the difference between a neighborhood pixel value of a false point in an image and the pixel value of the false point to calculate a correction value for correcting the false point, and obtaining a corrected remote sensing image; enabling the corrected remote sensing image to be imported into a mean value decreasing energy functional model, and obtaining an improved mean value decreasing energy functional; calculating the parameters of the remote sensing image through an improved active outline model according to the improved energy functional after the false point is modified, and obtaining a level set updating equation; enabling the improved active outline model to automatically expand or withdraw according to the level set updating equation, and completing the detection of a coastline when the absolute value of two adjacent iteration differences of an outline is less than a specific value and the outline movement stops. The whole process is not affected by an initial outline, and the method solves a problem of false point interference through a false point removal method during the segmenting of a remote sensing image through an existing active outline model, and enables the outline of the coastline to be clear and unique.

Description

technical field [0001] The present invention relates to the technical field of coastline detection, in particular to a coastline detection method based on an area active contour model. Relating to patent classification G06 Computing; Calculations; Counting G06K Data identification; Data representation; Record carriers; / 46 Extraction of image features or characteristics. Background technique [0002] The coastline is located at the junction of the ocean and the land, and with its unique geographical advantages, it has become an important area for human development. Along with coastal siltation, erosion, sea level rise caused by climate warming, and the influence of social factors such as human beings building dams and filling earth and rocks in the coastal zone, the coastline is constantly expanding or shrinking, with complexity and variability. The detection of environmental protection is one of the key objects of detection by the environmental department. Coastline dete...

AI Technical Summary

Problems solved by technology

[0008] The invention aims at the problem that the traditional segmentation method based on the active contour model is difficult to segment complex remote sensing images, and there are too many false points in the remote sensing images due to the strong inhomogeneity of the density, and the average value of vegetation, hills and other areas on land is different from that of sea areas. The mean values ​​are similar, and these factors have seriously affected the coastline detection results of remote sensing images. A coastline detection method based on the regional active contour model is proposed, including the following steps:

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