Coastline super-resolution mapping method and coastline super-resolution mapping system based on semi-global optimization

Abstract

The invention provides a coastline super-resolution mapping method and a coastline super-resolution mapping system based on semi-global optimization. The method mainly comprises the following steps ofacquiring an initial coastline image and a reference image, performing image preprocessing, image fusion and image registration, combining the change trend of an overall coastline form and the gray level change of the periphery of an initial coastline, extracting the change control point of the coastline, and dividing the initial coastline into a plurality of coastline segments; in each of the plurality of coastline segments, acquiring a sub-pixel positioning result in a coastline neighborhood window, and fitting the sub-pixel positioning coordinates of all points in the same section into a smooth curve section; combining all curve segments together to obtain a complete coastline vector result, and completing the super-resolution mapping of the coastline. According to the invention, a sub-pixel positioning method based on a sub-pixel positioning method of a local area and capable of being adapted to a high-curvature coastline environment is provided. The method is high in positioningprecision and can be applied to coastlines with different curvatures. The result accuracy of the method is improved.

Description

Technical field [0001] The invention belongs to the field of coastline image processing, and relates to a coastline super-resolution mapping method and system based on semi-global optimization. Background technique [0002] The coastline is the dividing line between the sea and the land, and is one of the most important 27 surface features. The coastline is affected by natural and man-made factors, resulting in changes in form and nature. Changes in natural conditions such as sea water dynamics (including tidal currents, etc.), geo-meteorological disasters, and sea level rise caused by climate warming have led to coastal silting and erosion; the impact of human activities such as human reclamation, land reclamation, and ocean engineering, At the same time as the coastline type changed, the direction and length of the coastline also changed significantly. [0003] Therefore, coastline mapping and change detection are the basic tasks of coastal erosion monitoring, coastal resource ...

AI Technical Summary

Problems solved by technology

[0011] Aiming at the shortcomings and deficiencies of the existing technical problems, the present invention provides a coastline super-resolution mapping method and system based on semi-global optimization, which is used to solve the technical problems that the positioning accuracy is not high and cannot adapt to the high-curvature coastline environment

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