Digital image watermarking method based on visual perception characteristics

A digital image and visual perception technology, which is applied in the field of digital image watermarking based on human visual perception, can solve the problem of less research on algorithms that balance the robustness and imperceptibility of digital watermarking

Inactive Publication Date: 2011-04-20
LIAONING NORMAL UNIVERSITY
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  • Abstract
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Problems solved by technology

[0004] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to study and design a novel digital image watermarking method based on visual perception characteristics,

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  • Digital image watermarking method based on visual perception characteristics
  • Digital image watermarking method based on visual perception characteristics
  • Digital image watermarking method based on visual perception characteristics

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Embodiment Construction

[0105] Specific embodiments of the present invention are shown in the accompanying drawings, with figure 1 The flow chart of the digital image watermarking method based on visual perception characteristics is shown, including the following five steps: digital image watermark preprocessing; extracting important regions; establishing a visual perception model; embedding digital image watermark; digital image watermark detection.

[0106] 1. Digital image watermark preprocessing

[0107] The first step is to form a one-dimensional vector from the binary watermark image by line scanning;

[0108] The second step is to use the logistic map to generate the chaotic key, and encrypt the one-dimensional digital image watermark sequence.

[0109] 2. Extract important areas

[0110] (1) Normalization of the original carrier image

[0111] The basic working principle of moment-based image normalization technology is as follows: firstly, use the moment invariant to affine transformation...

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Abstract

A digital image watermarking method based on visual perception characteristics provided by the invention relates to the technical field of information hiding and digital watermarking in multimedia information security, and mainly comprises the following five steps: preprocessing a digital image watermark; extracting an important region; creating a visual perceptual model; embedding the digital image watermark; and detecting the digital image watermark. A specific flow comprises the following steps: firstly, mapping a carrier image into a geometrical invariant space by using an image normalization method based on moment, and determining the important region in the normalized image by combining an invariant centroid theory; and then, establishing the visual perceptual model according to the visual perception characteristics; and finally, combining the visual perceptual model, and using a special adaptive quantization modulation policy to adaptively embed a 256-bit readable watermark in a DFT (discrete Fourier transformation) area of the important region. An original carrier is unnecessary for extracting out the watermark, so that blind detection is realized well. The method is not only good in transparency, but also has better robustness.

Description

technical field [0001] The digital image watermarking method based on visual perception characteristics of the present invention relates to the technical field of information hiding and digital watermarking in multimedia information security, and specifically relates to a digital image watermarking method based on human visual perception. Background technique [0002] At present, digital watermarking (Digital Watermarking), as an effective supplementary method to traditional encryption methods, is a new technology that can protect copyright and authentication source and integrity in an open network environment. a hotspot of research. The so-called digital image watermark is to hide a mark (watermark) with a specific meaning in a digital image product by means of data embedding, so as to prove the creator's ownership of his work and serve as a basis for identification and prosecution of illegal infringement. Through the detection and analysis of the watermark to ensure the i...

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Application Information

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IPC IPC(8): G06T1/00
Inventor 王向阳王晶
Owner LIAONING NORMAL UNIVERSITY
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