A method for extracting ship contours from optical remote sensing images based on sketch information

Abstract

The invention discloses a method for extracting ship contours from an optical remote sensing image based on sketch information. First, a sketch of an optical remote sensing image within a rectangular frame containing a ship target is generated, and the structural relationship between the sketch line segments and the prior knowledge of the ship are used to The sketch line segment is screened and supplemented to extract the sketch line segment around the ship; then the initial area of ​​the ship is obtained through the interconnection of the sketch line segment endpoints and image hole filling; finally, the ship area is corrected by the superpixel segmentation method to obtain the ship precise contours. The ship contour extraction method proposed by the invention is not affected by the internal structure of the ship, and can effectively extract high-quality ship contours.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for extracting a ship outline from an optical remote sensing image based on sketch information, which can be used to extract the outline of a ship target in the optical remote sensing image and obtain the precise position of the ship target. Background technique [0002] As a carrier of maritime transportation, ships are an important tool for utilizing the ocean and developing the ocean. Automatically extracting the outline of ships in optical remote sensing images to obtain the precise position of ships has broad application prospects in both civil and military fields. has very important practical significance. In terms of civil use, it can be used to monitor ports, dispatch sea ships, dredge sea traffic to improve sea traffic efficiency, cooperate with relevant departments to monitor and combat illegal fishing, smuggling and other illegal activitie...

AI Technical Summary

Problems solved by technology

The method based on the Snake algorithm first sets the initial outline of the ship, and then minimizes the energy function to make the initial outline deformation continuously approach the ship boundary, and finally obtains the accurate outline of the ship, but this type of method needs to artificially set the initial outline , the quality of the initial contour has a great influence on the quality of the final contour, and many parameters need to be set, and the results obtained by different parameters are quite different

The method based on saliency detection believes that the saliency of the ship is higher than that of the sea surface. The saliency map is obtained by the saliency detection of the sea surface, and the area where the ship is located is obtained by thresholding the saliency map. Sexuality detection usually pays more attention to the brighter places on the ship, and the darker places are not obvious and will be ignored. For ships with large color differences in various parts, the ship outline obtained by this method only includes part of the ship. not precise enough

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