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High-capacity reversible image watermarking algorithm based on multi-scale decomposition and interpolation expansion

A multi-scale decomposition and image watermarking technology, applied in the field of image processing, can solve the problems of low visual quality and embedding capacity, and achieve the effects of good invisibility and payload capacity, expanded capacity, and good visual quality

Active Publication Date: 2020-01-31
HUAIYIN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

[0005] Purpose of the invention: Aiming at the problems of low visual quality and low embedding capacity in the prior art, the present invention provides a large-capacity reversible image watermarking algorithm based on multi-scale decomposition and interpolation expansion. The visual quality of the image is greatly improved, and the original image can be completely restored after the watermark is extracted, realizing the reversibility of the algorithm

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  • High-capacity reversible image watermarking algorithm based on multi-scale decomposition and interpolation expansion

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[0072] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0073] The invention discloses a large-capacity reversible image watermarking algorithm based on multi-scale decomposition and interpolation expansion, which mainly includes two parts: watermark embedding and watermark extraction, which are described in detail below:

[0074] Watermark embedding steps:

[0075] Step S1 performs cat face scrambling transformation on the watermark W to obtain W', and transforms W' into a one-dimensional binary sequence.

[0076] The traditional cat face Arnold scrambling transformation matrix is ​​relatively simple, and it is easy to be decrypted by the attacker to restore the original watermark when it is attacked maliciously. The confidentiality and robustness are not strong enough. In order to enhance the anti-attack robustness and security of the digital image watermarking system, this paper improves the traditional Arnold scrambl...

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Abstract

The invention relates to the technical field of image processing, and discloses a high-capacity reversible image watermarking algorithm based on a multi-scale decomposition and interpolation algorithm, which comprises a watermark embedding part and a watermark extracting part, and is characterized in that the watermark embedding capacity is further increased through multi-scale decomposition and interpolation expansion before watermark embedding; watermark information is embedded through a generalized interpolation expansion method, pixel value overflow of overflowing corresponding image pixelpoints is avoided through gray scale overflow processing, then the embedding capacity is further increased, and watermark extraction is an inverse process of watermark embedding. Compared with the prior art, the method has the advantages that when equivalent watermark information is embedded, good watermark-containing image visual quality is kept, and better invisibility and payload capacity areachieved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a large-capacity reversible image watermarking algorithm based on multi-scale decomposition and interpolation expansion. Background technique [0002] Reversible image watermarking refers to embedding the watermark into the original image under the premise of ensuring the visual quality of the original image, and when the watermark is extracted, the original image can be restored without loss. Compared with traditional digital image watermarking, reversible image watermarking puts forward higher requirements for watermark embedding, and also makes it more widely used in judicial, military, medical and other fields that require high image authenticity and integrity. research and application value. One of the basic goals of reversible image watermarking algorithm research is to obtain the maximum amount of effective information embedding with less distortion. [0003] In...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0021G06T2201/0203
Inventor 张正伟李芬芬陈伯伦肖绍章金圣华
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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