Research And Implementation Of Digital Watermarking System Based On Copyright Protection

With the development of the network,the popularity of intelligent terminal devices such as computers,smart phones and tablets is getting higher and higher.Digitized information has become the main way for people to obtain all kinds of information by virtue of its diversified media manifestations,various ways of transmission and efficient and convenient channels of transmission.While providing convenient services,digital information has become the main way for people to obtain all kinds of information.The security of digital information is gradually concerned,and the generation of digital watermarking provides a reliable and effective means for people to solve copyright problems.Digital watermarking technology embeds some identification information into the carrier,which can protect the security of the carrier and prevent unauthorized users from using it.In addition to the common invisible watermarking,the research of visual watermarking is a hot and difficult topic in the field of information security.In addition,most of the common watermarking systems are single watermarking,and the function of single watermarking algorithm is relatively single.It is difficult to satisfy the many important requirements of copyright protection and tampering prevention put forward by users,so the research of double watermarking system has been developed.With the development of image application technology in professional fields,such as aerospace and medical images,the original image must not be destroyed while guaranteeing copyright information,but the robustness of reversible watermarking algorithm is generally poor,so robust reversible watermarking becomes an urgent problem in watermarking research.The system is divided into three functional modules,which are video dual watermarking module based on copyright protection,medical image visual reversible watermarking module based on copyright protection and visual watermarking tamper-proof detection module based on copyright protection.Firstly,the video Dual-Watermarking module based on copyright protection constructs robust watermarking by using the rotation invariance and anti-interference of singular values,and constructs fragile watermarking by restoring the original image with a small amount of compressed sensing data.The module proposes a Dual-Watermarking algorithm,which can guarantee the stability and anti-attack of video data.The Dual-Watermarking algorithm can also guarantee the security and integrity of video information.The visual reversible watermarking module of medical image based on copyright protection mainly aims at medical image.The module uses regression support vector machine to construct visual reversible watermarking,and uses global localization map and texture grade to enhance the robustness and visibility of the watermarking algorithm.The module proposes a visual reversible watermarking algorithm,which can protect the reversibility and privacy of medical image.The tamper-proof detection module of visual watermarking based on copyright protection mainly uses the least square method to remove the visual watermarking.This algorithm can realize the security detection of the visual watermarking on the premise of using fewer samples.