Digital watermark technology based copyright protection method orienting to remote sensing tile data

Abstract

The invention discloses a digital watermark technology based copyright protection method orienting to remote sensing tile data. According to the method, based on the analysis of the characteristics of the remote sensing tile data and the requirements of the remote sensing tile data for copyright protection, watermark information is not lost in the spliced watermark-containing remote sensing data and is only changed in coordinate positions, and the synchronization relationship between raw data and the watermark information is effectively guaranteed by virtue of an established watermark embedding rule. During watermark detection, image blocks containing the watermark information are rapidly and accurately located by adopting a golden section method search mechanism, and the watermark information is extracted from the image blocks. According to the copyright protection method disclosed by the invention, the characteristics of pixel values of the remote sensing tile data before and after splicing are fully utilized to realize the correct extraction of the watermark information subjected to splicing, so that the robustness of a watermark algorithm is greatly increased, the problem that the tile data cannot resist splicing attacks at present is solved, and the copyright of the tile data is protected effectively.

Description

technical field [0001] The invention belongs to the field of geographic information copyright protection, and in particular relates to a digital watermarking method using the golden section method for remote sensing image data of tiles, so as to improve the splicing resistance of the digital watermarking algorithm of remote sensing images and realize copyright protection of remote sensing data of tiles. Background technique [0002] With the development of network technology, the application of geographic data is more extensive. Many websites such as Baidu and Google provide electronic map services, especially the popularization of geographic data publishing software represented by GoogleEarth, which greatly promotes the development of geographic information industry. . my country is also vigorously developing network geographic information services. The National Bureau of Surveying, Mapping and Geoinformation jointly developed the "Tiantu Map" website, which actively promot...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose an anti-splicing watermarking algorithm based on the golden section method in view of the fact that the current tile remote sensing data watermarking technology cannot solve the synchronization of watermark information, is difficult to resist splicing attacks, and cannot effectively protect the copyright of tile remote sensing data. On the basis of maintaining the anti-geometric attack, the algorithm can effectively resist the splicing attack of tile data, thus improving the robustness of the algorithm

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