An image spread spectrum watermark embedding method with adaptive embedding strength
A technology of embedding strength and watermark embedding, which is applied in image watermarking, image data processing, image data processing, etc., can solve the problems that embedded strength cannot take into account robustness and invisibility, host signal interference, etc., and achieves shielding host signal interference. , Improve solution efficiency, resist image processing attacks and geometric attacks
Active Publication Date: 2019-02-01
TAIYUAN UNIV OF TECH
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[0007] In order to solve the problems of host signal interference in the spread spectrum method and the inability to take into account the robustness and invisibility using a fixed embedding strength, the present invention proposes a spread spectrum with adaptive embedding strength for the application scenario of embedding watermarks in the DCT domain. Frequency Watermark Embedding Method
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[0042] The following is a clear and complete description of the technical problems solved by the embodiments of the present invention, the adopted technical solutions and the achieved technical effects in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in the present application, all other equivalent or obviously modified embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the invention can be embodied in many different ways as defined and covered by the claims.
[0043] It should be noted that, in the following description, many specific details are given for the convenience of understanding. It may be evident, however, that the present invention may be practiced without these specific details.
[0044] It should be note...
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The invention discloses a spread spectrum watermark embedding method with adaptive embedding strength. The embedding method comprises the following steps: designing a spread spectrum watermark capableof completely shielding the interference of the host signal by utilizing the prior knowledge of the interference of the host signal; And adaptively adjusting the value of the embedding strength in the spread spectrum watermark according to different carrier images, so that the robustness of the watermark can be maximized while the invisibility of each image is guaranteed; At last, that spread spectrum watermark is embed into the carrier image. The invention not only can completely shield the interference of the host signal, but also can effectively resist various common image processing attacks and geometric attacks, at the same time, all images embedded with the watermark can obtain consistent invisibility. And the invention can be applied to various watermarking techniques based on discrete cosine transform.
Description
technical field [0001] The embodiment of the invention relates to the technical field of digital image copyright protection, in particular to a method for embedding a spread spectrum watermark with adaptive embedding strength. Background technique [0002] With the rapid development of computer, Internet and digital media technology, digital media content including images can be easily produced, disseminated, copied and modified on the network, which brings convenience to people, but also causes serious Internet copyright issues. In recent years, more and more attention has been paid to online digital copyrights. People have clearly felt the great impact of online piracy and infringement on the interests of rights owners. The demands of the world and academia to resist online piracy and infringement are becoming more and more prominent. Image watermarking technology provides a good solution to the problem of digital image copyright protection. It embeds a digital mark iden...
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CPCG06T1/0028G06T1/0064G06T2201/0202G06T2201/0052G06T1/005G06T1/0092G06T2201/0051H04B17/318
Inventor 牛保宁黄樱关虎张树武刘杰
Owner TAIYUAN UNIV OF TECH