Cellular automata-based blind watermark implementing method

A technology of cellular automaton and implementation method, which is applied in the field of watermark processing, can solve problems such as loss of precision images, complex key information, and complex implementation, and achieve large information capacity, high decoding reliability, and strong error correction capabilities Effect

Inactive Publication Date: 2010-07-14
TIANJIN YIBU SCI & TECH DEV
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AI Technical Summary

Problems solved by technology

In the specific implementation, the DCT method is easy to cause blocking effect, and the DFT method is easy to cause the loss of precision and cannot accurately reconstruct the image.
Some people have proposed to use Independent Component Analysis (ICA) to realize blind watermarking, but because the algorithm is complex to implement, the amount of calculation is large, and it needs to generate more complex key information, it is difficult to implement

Method used

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  • Cellular automata-based blind watermark implementing method
  • Cellular automata-based blind watermark implementing method
  • Cellular automata-based blind watermark implementing method

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Embodiment Construction

[0054] 1. The process of embedding watermark:

[0055] The watermark embedding process is divided into four steps, including: lifting wavelet transform for the original image, cellular automata operation, watermark image processing, and digital watermark embedding operation. The implementation process is as follows: figure 2 shown.

[0056] 1. Lifting wavelet transform for the original image

[0057] Assuming that the size of the host image O is N×N pixels, the host image O is subjected to lifting wavelet transform, and four components of the lifting wavelet transform are obtained, denoted as Oa, Oh, Ov, Od, and the sizes of the four components are N× N / 4. The forward lifting process of lifting wavelet can be decomposed into three processes: splitting, prediction and correction. The specific implementation process is as follows:

[0058] (1) split. Decompose the sequence set of images O into two smaller subsets, λ -1 and gamma -1 , for odd and even sets.

[0059] (2) P...

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Abstract

The invention relates to a cellular automata-based blind watermark implementing method, and relates to the technical fields of digital watermark processing and the like. The scheme of the invention comprises a watermark embedding process and a watermark extracting process, wherein the watermark embedding process comprises the following four steps: performing lifting wavelet transform on an original image; performing cellular automata operation; processing a watermark image; and performing digital watermark embedding operation; and the watermark extracting process comprises the following four steps: performing lifting wavelet transform; processing by a cellular automata; extracting watermark information; and decoding PDF417 two-dimension codes. The blind watermark implementing method provided by the invention has the advantages of strong robustness and simple operation, and solves the problem of implementing the blind watermark.

Description

technical field [0001] The invention relates to a method for realizing a blind watermark based on a cellular automaton, and relates to technical fields such as watermark processing. Background technique [0002] According to whether the extraction process needs the original image, digital watermarking can be divided into blind watermarking and non-blind watermarking. Blind watermarking does not require the participation of the original image in the extraction process, while non-blind watermarking requires the participation of the original image in the detection process. At present, most digital watermarking research is based on non-blind watermarking, that is, the extraction process requires the participation of the original image, which makes these methods very limited in implementation. In the research of blind watermarking, some people propose to implement blind watermarking through methods such as discrete cosine transform (Discrete Cosine Transform, referred to as DCT ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 李立宗韩艳慧
Owner TIANJIN YIBU SCI & TECH DEV
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