Self-adaptive reversible watermark method and system

An adaptive, watermarking technology, applied in the direction of instrumentation, computing, image data processing, etc., can solve the problems of low security of hidden data, high embedding distortion, and low data embedding capacity, and achieve high embedding capacity, low embedding distortion, and safe sex high effect

Inactive Publication Date: 2018-11-23
PEKING UNIV +2
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The present invention provides an adaptive reversible watermarking method and system to solve the problems of low data embedding capacity, high embedding distortion and low security of hidden data in the watermarking method in the prior art

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  • Self-adaptive reversible watermark method and system
  • Self-adaptive reversible watermark method and system
  • Self-adaptive reversible watermark method and system

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Embodiment Construction

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0033] figure 1 This is a schematic flow chart of an adaptive reversible watermarking method provided by Embodiment 1 of the present invention, such as figure 1 As shown, the method includes the following steps:

[0034] 11. Divide the carrier image into multiple non-overlapping pixel pairs (x, y), two pixels in each pixel pair are adjacent, where x is the pixel value of the previous pixel and y is the next The pixel value of the pixel.

[...

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Abstract

The invention provides a self-adaptive reversible watermark method and system. The method comprises the following steps of: dividing a carrier image into a plurality of adjacent pixel pairs which arenot coincident; calculating corresponding difference values by utilizing a gradient prediction method and generating a two-dimensional difference value histogram; selecting an optimum path in the two-dimensional difference value histogram by adoption of a dynamic planning algorithm, and establishing a first corresponding relationship between pixels corresponding to a difference value pair on the optimum path and bit information carried by a to-be-embedded watermark; if the difference value corresponding to the pixel pair is not on the optimum path, modifying the pixel pair according to a preset first rule; if the difference value corresponding to the pixel is on the optimum path and a value of the bit information corresponding to the pixel pair is 1, modifying the pixel pair according to the preset first rule and the first corresponding relationship; and if the value of the bit information corresponding to the pixel pair is 0, not modifying the pixel pair. The method and system are high in data embedding capacity, low in embedding distortion and high in hidden data safety.

Description

Technical field [0001] The present invention relates to the technical field of digital watermarking, in particular to an adaptive reversible watermarking method and system. Background technique [0002] As modern society enters the Internet information era, multimedia digital carriers such as images, audio, and video have become the main media for carrying information. With the rapid development of computer science and technology and the popularization of the Internet, more and more information is widely produced, disseminated and shared through these multimedia carriers. Correspondingly, the openness and sharing of the Internet age has caused a series of security problems in the process of digital information dissemination, such as illegal copying and illegal tampering. In addition, the concealment and protection of confidential information that disseminators do not want to disclose has also become an important requirement. In response to such problems, information hiding tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0028G06T2201/0203
Inventor 薛博文李晓龙郭宗明
Owner PEKING UNIV
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