Abstract
In the continuous development of computer network technology, multimedia technology and information technology, digitization has become the main means of displaying information, thus facilitating the storage, copying and dissemination of digital multimedia information. In this context, there are no restrictions on arbitrary editing, copying, modification, and dissemination of digital images, music, etc., which leads to various social problems such as information security, copyright disputes, and piracy. With the advancement of networks and multimedia, digital watermarking technology has received worldwide attention as an effective method of copyright protection. Improving the anti-geometric attack ability of digital watermarking algorithms using image feature-based algorithms have received extensive attention. This paper proposes a novel robust watermarking algorithm based on SURF-DCT perceptual hashing (Speeded Up Robust Features and Discrete Cosine Transform), namely blind watermarking. The algorithm firstly uses the affine transformation with a feature matrix and chaotic encryption technology to preprocess the watermark image, enhance the confidentiality of the watermark, and perform block and DCT coefficients extraction on the carrier image, and then uses the positive and negative quantization rules to modify the DCT coefficients. The embedding of the watermark is completed, and the blind extraction of the watermark realized. Experiments show that the algorithm has good invisibility and strong robustness against conventional and geometric attacks and can effectively protect the security of images with NC value more than 90%.
Highlights
In recent years, with the development of network communication and multimedia technology, the copyright protection and content authentication of digital products have received more and more attention
Advance hybrid medical watermarking algorithm and we proposed algorithm based on similar approach by dividing the image in different blocks of low frequency and high frequency
Cedillo-Hernandez et al [19] proposed a new method by using the discrete Fourier transform (DFT) whereby watermarking is done by embedding it in the middle frequency band amplitude of the image and using Speedup Robust Feature (SURF) for selecting object regions as features which helps in restoring the watermark even if the image is distorted
Summary
With the development of network communication and multimedia technology, the copyright protection and content authentication of digital products have received more and more attention. Advance hybrid medical watermarking algorithm integrity of digital products, how to ensure the protection of the copyright of digital products It is crucial that the information is robust and resistant to detection. Many anti-geometric attack algorithms have emerged, making anti-geometric attack watermarking algorithms a hot topic of research Such algorithms generally use the invariance of feature points, or the invariance of moments to correct the image under attack, and extract the watermark. Digital watermark can effectively protect the actual copyright, and it has become a key content in the research of multimedia information security [5]. Digital watermark can use the corresponding algorithm to integrate secret information into the protected digital multimedia, that is, watermark, which represents the behavior of copyright ownership and tracking infringement [6]. A proposed algorithm and experiment were performed, followed by a conclusion and future research directions
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