Immune and digital image watermarking method for leveled rights management of digital works

Abstract

The invention relates to an immune and digital image watermarking method for leveled rights management of digital works. The method comprises a part of watermark embedded and leveled quality lock control processing and a part of leveled rights management and protection; watermark embedded and leveled quality lock control processing is composed of a watermark embedding process and a leveled quality lock control process; the watermark embedding process comprises watermark pre-processing, copyright watermark embedding, rights watermark embedding and quality lock and control thereof, and after watermark embedding, different levels of image qualities are locked and controlled in the leveled manner; and leveled rights management and protection is formed by key distribution and rights distribution. According to the invention, leveled using rights and copyright rights protection are realized, related rights are separated effectively and are thus not overlapped, attacks according to similarity of adjacent pixels can be prevented effectively, and thus, the method serves as a rights management mode in the authorization mode, is highly safe, and provides technical support for safe sharing of digital image works in a digital community.

Description

technical field [0001] The invention belongs to the field of information technology, and relates to a digital image digital watermarking method, in particular to an immune image digital watermarking method oriented to digital works hierarchical rights management. Background technique [0002] Generally speaking, digital watermarking methods for protecting digital image-related rights and interests can be divided into two categories: one is to realize the function of protecting image copyright rights and interests by embedding digital watermark information into digital images, which is the so-called robust watermarking method; Correlating the watermark information with the content of the image itself and embedding it into the easily damaged area of ​​the image can be used to protect the integrity of the image content, that is, the fragile watermark method. The basic assumption is that the watermark is invisible, that is, after the watermark is embedded, the image quality is n...

AI Technical Summary

Problems solved by technology

Obviously, any attack will lead to the loss of SSRC information, making it impossible to restore IA, so that the watermark has a natural "immune" feature

However, the existing immune watermarking method has the following disadvantages: (1) It is limited to the protection of rights of use, and can only implement corresponding protection of rights of use, and cannot protect the original copyright of the work, because once the user obtains the authorization key, the image will be restored After the original image is converted, the watermark is completely removed, and its copyright cannot be protected

(2) Limited to one-time protection of rights and interests, unable to implement hierarchical protection management

(3) Two key factors lead to its low security: (a) its watermark embedding formula is based on a linear relationship, the attacker can estimate the value of α according to the correlation of adjacent pixels, and crack IA';( b) Experiments show that the controllable range of the watermark embedding depth α value is small. Generally speaking, in order to ensure that the image after embedding the watermark can be restored, α should not exceed 0.3, so it is vulnerable to guessing attacks

Images