Color blind watermarking method based on Hamming code, eigenvalue decomposition and image correction

Abstract

The invention discloses a color blind watermarking method based on Hamming codes, eigenvalue decomposition and image correction by combining a Hamming coding theory and eigenvalue decomposition. Firstly, all characteristic values of a pixel block are obtained according to characteristics of characteristic value decomposition, and embedding and blind extraction of a digital watermark are completedby quantizing the sum of absolute values of the characteristic values; secondly, according to the geometric attributes of the image containing the watermark, the image after various geometric attackscan be corrected. According to the method, the digital watermark of the color image can be embedded into the color host image, so that the method not only has better watermark concealment and higher safety, but also has stronger robustness and larger embedding capacity, and is suitable for occasions of copyright protection of high-capacity color digital images with strong robustness.

Description

technical field [0001] The invention belongs to the field of network space security and relates to the copyright protection of color digital images as watermarks. Background technique [0002] With the rapid development of Internet technology, the amount of information on the network is increasing rapidly, and color digital images, as carriers of large amounts of information, are increasingly entering people's lives, bringing great convenience to people. At the same time, the network Some illegal infringements such as distortion, tampering, and plagiarism on the Internet have also followed. In addition, the carrier image with a large amount of information is more likely to be disturbed by noise. The robustness of the watermark algorithm is facing severe challenges. The copyright of color digital images The problem of protection has been widely concerned by people; at the same time, the damage to the watermark contained in the carrier by image geometric processing makes it mo...

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Problems solved by technology

[0002] With the rapid development of Internet technology, the amount of information on the network is increasing rapidly, and color digital images, as carriers of large amounts of information, are increasingly entering people's lives, bringing great convenience to people. At the same time, the network Some illegal infringements such as distortion, tampering, and plagiarism on the Internet have also followed. In addition, the carrier image with a large amount of information is more likely to be disturbed by noise. The robustness of the watermark algorithm is facing severe challenges. The copyright of color digital images The protection problem has been widely concerned by people; at the same time, the damage of image geometry processing to the watermark contained in the carrier makes it more difficult to blindly detect the watermark

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