Color-blind Watermarking Method Based on Hamming Code, Eigenvalue Decomposition and Image Correction

Abstract

The invention combines Hamming code theory and eigenvalue decomposition, and discloses a color-blind watermark method based on Hamming code, eigenvalue decomposition and image correction. First, according to the characteristics of eigenvalue decomposition, the present invention obtains all the eigenvalues ​​of the pixel block, and completes the embedding and blind extraction of the digital watermark by quantifying the sum of the absolute values ​​of the eigenvalues; Geometry attribute, rectifies images after various geometric attacks. The invention can embed the color image digital watermark into the color host image, which not only has good watermark concealment and high security, but also has strong robustness and large embedding capacity, and is suitable for strong robust Occasions for copyright protection of large-capacity color digital images.

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...

Examples

Embodiment Construction

[0071] The purpose of the present invention is to provide a color-blind watermarking method based on Hamming code, eigenvalue decomposition and image correction, which is characterized in that it is realized through four processes, specifically including a preprocessing process, a watermark embedding process, an image correction process and a watermarking process. Extraction process:

[0072] Process 1: Preprocessing process, the specific steps are described as follows:

[0073] Step 1: Preprocessing of the color host image: Perform dimensionality reduction processing on the 3D color host image H with a size of 512×512×3 to obtain three 2D layered host images H of red, green and blue p , and divide the pixels in each layer into 2×2 non-overlapping pixel blocks, p=1, 2, 3 respectively represent three layers of red, green and blue;

[0074] Step 2: Preprocessing of the color watermark image: Perform dimensionality reduction processing on the 3D color watermark image W with a si...

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...

Examples

Embodiment Construction

[0071] The purpose of the present invention is to provide a color-blind watermarking method based on Hamming code, eigenvalue decomposition and image correction, which is characterized in that it is realized through four processes, specifically including a preprocessing process, a watermark embedding process, an image correction process and a watermarking process. Extraction process:

[0072] Process 1: Preprocessing process, the specific steps are described as follows:

[0073] Step 1: Preprocessing of the color host image: Perform dimensionality reduction processing on the 3D color host image H with a size of 512×512×3 to obtain three 2D layered host images H of red, green and blue p , and divide the pixels in each layer into 2×2 non-overlapping pixel blocks, p=1, 2, 3 respectively represent three layers of red, green and blue;

[0074] Step 2: Preprocessing of the color watermark image: Perform dimensionality reduction processing on the 3D color watermark image W with a si...

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