Spatial domain color image blind watermarking method fused with Haar transform

A color image, blind watermarking technology, applied in image watermarking, image data processing, image data processing and other directions, can solve the problems of watermark embedding and extraction time lengthening

Active Publication Date: 2019-11-05
LUDONG UNIVERSITY
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Problems solved by technology

[0002] With the development of network technology, the Internet has entered people's lives irresistibly, and people can obtain and release a large amount of information through the network; color digital images, as a carrier of large amounts of information, are increasingly entering people's network life; however, Some illegal infringements such as distortion, tampering and plagiarism on the Internet have als

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  • Spatial domain color image blind watermarking method fused with Haar transform
  • Spatial domain color image blind watermarking method fused with Haar transform
  • Spatial domain color image blind watermarking method fused with Haar transform

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Embodiment Construction

[0042] The purpose of the present invention is to provide a kind of space-domain color image blind watermarking method that combines Haar transform, comprises the embedding process and extraction process of color image digital watermark, and the specific process of its watermark embedding is described as follows:

[0043] Step 1: Preprocessing of the color host image: convert a 24-bit color host image with a size of 512×512 H Perform layered processing to obtain three layered host images of red, green, and blue H p , and divide the pixels in each layer into 2×2 non-overlapping image blocks, p =1,2,3 represent red, green and blue respectively;

[0044] Step 2: Preprocessing of color watermark images: 24-bit color watermark images with a size of 32×32 W Do layered processing to obtain three layered watermark images of red, green, and blue, and then perform a private key-based K p The affine transformation of the scrambled layered watermark image W p , p = 1, 2, 3 represe...

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Abstract

The invention discloses a spatial domain color image blind watermarking method fused with Haar transform by combining the advantages of good concealment of an airspace digital watermarking algorithm and strong robustness of a frequency domain digital watermarking algorithm. According to the method, based on the characteristic that Haar transform has correlation between space-frequency domains, themaximum energy coefficient in a matrix of an image block after Haar transform is directly obtained in a space domain. The embedding and blind extraction of digital watermarks are completed by quantizing the maximum energy coefficient. According to the method, the color image digital watermark can be embedded into the color host image. The method has the advantages of being high in robustness, good in watermark concealment, high in safety, high in execution efficiency and high in embedding amount. The method is suitable for occasions of high-concealment high-capacity color digital image rapidcopyright protection.

Description

technical field [0001] The invention belongs to the technical field of network space security, and relates to the copyright protection of color digital images as watermarks. Background technique [0002] With the development of network technology, the Internet has entered people's lives irresistibly, and people can obtain and release a large amount of information through the network; color digital images, as a carrier of large amounts of information, are increasingly entering people's network life; however, Some illegal infringements such as distortion, tampering, and plagiarism on the Internet have also followed, and the copyright protection of color digital images has attracted widespread attention. The size of the color copyright logo image is getting larger and larger, and the embedding and extraction time of the watermark is getting longer, and the execution efficiency of the watermarking algorithm is facing challenges; at the same time, the watermark capacity and water...

Claims

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Application Information

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IPC IPC(8): G06T1/00
CPCG06T1/005
Inventor 苏庆堂刘得成袁子涵王刚王环英徐效美张雪婷
Owner LUDONG UNIVERSITY
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