Application Of Digital Watermarking Technology In "Second Survey" Remote Sensing Data Sharing

In response to the policy requirements of the country, in order to management and application of the "Second land survey" data. The departments to develop "the system of resources data-centric of second land survey to distributed management and sharing of data of Xinjiang." This paper part of the sensing systemis related to the image data sharing. In global Internet with the rapid development of information technology, information transmission becomes quick and easy. Data security issues are also increasingly prominent. To share data sharing must be safe, digital watermarking technology is secure image sharing emerging technologies.Remote sensing is an important source of base geospatial data. With the fast development of remote sensing technology and shoved their applications are increasingly widespread, its value is also growing attention. But remote sensing data security issues facing the increasingly serious, so the security of remote sensing images without delay. In recent years the application of digital watermarking technology in remote sensing image is a hot topic.digital watermarking technology research has made some achievements. However, remote sensing image is different from the image, it is a amount of data, complex texture is not only the image data but also implied large amounts of information. This requirement of remote sensing image digital watermarking technology should take full account of their own image characteristics and application requirements. The technical principle is: embedded in the remote sensing images to identify the copyright information signal watermark, when a copyright dispute, we can extract the watermark information to determine copyright ownership.Suggestions for improvement of LSB digital watermarking algorithm based on the design of remote sensing image digital watermarking algorithm anti-cut, the paper content and results of the research include:(1) digital watermark embedded position has changed times lower least significant bit embedded embedded, thus ensuring watermark algorithm invisibility and accuracy of remote sensing image data;(2) watermark information itself and adding processes by means of an exclusive oR operation, and add watermark information while adding sentry position to effectively improve the efficiency and robustness of watermarking algorithm;(3) future anti-cropping algorithm to improve the robustness of the attack, the image block, and then the watermark is embedded in each sub-image;(4) watermarking system by designing experiments to verify this watermarking algorithm,, subjective and objective aspects have good imperceptibility, attacks on the crop is robust enough to satisfy the requirements of efficiency and accuracy of remote sensing data of the algorithm.