Dual zero watermark method and system of vector map, storage medium and server

Abstract

The invention discloses a dual zero watermark method of a vector map, wherein the dual zero watermark method comprises: extracting feature points and non-feature points from the vector map to obtain the feature points and the non-feature points of the vector map; after a series of data mining processes is performed on the feature points, obtaining an angle value sequence of a triangle composed ofthe feature points; after a series of data mining processes is performed on the non-feature points, obtaining a binary table of the non-feature points; obtaining a watermark sequence after a series ofprocesses is performed on an initial watermark; performing XOR operations on the watermark sequence and the angle value sequence and on the watermark sequence and the binary table separately, and then performing graphical and merging process to obtain the dual-watermark vector map. In the embodiment of the present invention, the vector map uses dual watermarks so as to solve the poor watermark robustness in case of feature point attack. The present invention also provides a dual zero watermark system of the vector map, a storage medium and a server.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a double zero watermark method, system, storage medium and server for vector maps. Background technique [0002] Two-dimensional vector maps have extremely high application value in many fields such as engineering construction, urban planning, military affairs, and navigation, but they are expensive to manufacture, and are easily copied, tampered, and embezzled in the process of network dissemination, thereby causing serious damage to the holders. The immeasurable loss; with the increasing demand for copyright protection, digital watermarking, as an important method of copyright protection, has developed rapidly in recent years; the research on digital watermarking of images was the first to be carried out, mainly focusing on the design of watermark embedding algorithms in a targeted manner. To improve the invisibility or robustness of watermarking, the rich research res...

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Problems solved by technology

[0005] The object of the present invention is to overcome the deficiencies of the prior art. The present invention provides a double zero watermark method, system, storage medium and server of a vector map, by extracting the sequence information of the feature points and non-feature points of the vector map, respectively Perform XOR operation with the watermark sequence information to obtain a double zero watermark image, which solves the lack of watermark robustness when attacking feature points

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