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Reversible information hiding method based on dynamic prediction of pixel value

A dynamic prediction and information hiding technology, applied in the field of information security, can solve the problems of large image distortion and small information capacity

Active Publication Date: 2019-02-26
GUANGXI NORMAL UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] In the existing several types of reversible information hiding algorithms, although the reversible hiding of secret information can be better realized, the hidden information capacity is small, and the image distortion after hiding the information is relatively large.

Method used

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  • Reversible information hiding method based on dynamic prediction of pixel value
  • Reversible information hiding method based on dynamic prediction of pixel value
  • Reversible information hiding method based on dynamic prediction of pixel value

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Experimental program
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Embodiment

[0059] refer to figure 2 , a reversible information hiding method based on dynamic prediction of pixel values, comprising the following steps:

[0060] 1) Dynamic prediction of pixel values: such as figure 1 As shown, the pixels in the original image are divided into two non-overlapping white area parts and black area parts in the form of a checkerboard, and the set of pixels in the white area is A, and the set of pixels in the black area is B, which is hidden in A Secret information, let x be the current pixel and x∈A, and the 13 adjacent pixels around it are c i , where, i=1,2,…,13, let c 1 ,c 2 ,...,c 13 The variance of is Δ, then:

[0061]

[0062] Among them, c ave means c 1 ,c 2 ,...,c 13 When Δ>T, T is the threshold. In this example, T=5, which means that the current pixel point x is in the texture area, and the point is not predicted. When Δ≤T, it means that the current pixel point x is in smooth area, with c 1 ,c 2 ,...,c 13 The pixels in the dynamic ...

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Abstract

The invention discloses a reversible information hiding method based on dynamic prediction of pixel values. The method is characterized by comprising the following steps: 1) dynamically predicting pixel values; 2) embedding secret information; 3) extracting the secret information and recovering images. The method is high in hiding capacity, and precision of the predicted pixel value is high through dynamically predicting the pixel value, and an optimal embedded value is adjusted according to hidden information capacity, so that image distortion after hiding the information is small, and hidingeffect is good.

Description

technical field [0001] The invention relates to the fields of information security and image processing, in particular to a reversible information hiding method based on dynamic prediction of pixel values. Background technique [0002] With the continuous development of computer and Internet technology, data transmission has become more and more convenient, but at the same time, it is also faced with data interception, tampering, copying and other situations. Therefore, while it is convenient for people to obtain various digital media information, how to protect the security of these media information has become an urgent problem to be solved. As an important means to ensure information security, information hiding technology has made great progress in the past, and has become a hot spot and direction in the field of research. As a new branch of information hiding technology, the reversible information hiding technology that can accurately restore the information of the ori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/467
CPCH04N19/467
Inventor 张显全王德望俞春强唐振军
Owner GUANGXI NORMAL UNIV
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