A reversible information hiding method based on self-adaptive expansion of a two-dimensional prediction error histogram

A prediction error and histogram technology, applied in the field of information security, can solve problems such as the inability to reflect the advantages of high-dimensional histograms and optimal mapping strategies, and the lack of flexibility in algorithm design, so as to improve the embedding performance and ensure the embedding capacity.

Active Publication Date: 2019-06-28
BEIJING JIAOTONG UNIV
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Problems solved by technology

However, the exploration of mapping strategies by current algorithms is still relatively basic, and most of the considerations are low-dimensional histograms, so the flexibility of algorithm design is insufficient, and the advantages of using high-dimensional histograms and optimal mapping strategies cannot be reflected.

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  • A reversible information hiding method based on self-adaptive expansion of a two-dimensional prediction error histogram
  • A reversible information hiding method based on self-adaptive expansion of a two-dimensional prediction error histogram
  • A reversible information hiding method based on self-adaptive expansion of a two-dimensional prediction error histogram

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[0047] For different natural images, their different degrees of smoothness will lead to different characteristics of histograms, and the number of prediction error pairs and the corresponding modification will greatly affect the capacity and distortion brought by the embedding. In the traditional prediction error expansion (Prediction-Error Expansion, PEE), usually, the prediction error histogram will obey the Laplace-like distribution centered on 0 or close to 0, then the histogram 0 and -1 There is a high probability that the area where the pixels are located is large enough and smooth enough to be used for embedding. Therefore, we select all pixels with prediction error values ​​of 0 and -1 to embed, and the other points with larger prediction error values ​​are not embedded, but only shifted, without increasing the capacity. However, if the peaks of the histogram are concentrated between 0 and 1, then the optimal embedding positions should be 0 and 1, and the number of emb...

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Abstract

The invention provides a reversible information hiding method based on self-adaptive expansion of a two-dimensional prediction error histogram, and the method comprises the steps: dividing an originalimage into a black pixel layer and a white pixel layer in a checkerboard mode, and sequentially carrying out the following steps on the black pixel layer and the white pixel layer; pairing the adjacent pixels in the same layer of pixels, predicting pixel values, and obtaining a two-dimensional prediction error histogram; searching an optimal reversible mapping strategy through an adaptive optimization method according to the two-dimensional prediction error histogram; and performing secret information embedding on the image according to the optimal reversible mapping strategy. According to the method, the optimal reversible mapping strategy is found out in a self-adaptive optimization mode, on the premise that the embedding capacity is guaranteed, embedding distortion is reduced, and theembedding performance is improved.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a reversible information hiding method based on self-adaptive expansion of a two-dimensional prediction error histogram. Background technique [0002] In recent years, with the rapid development of computer science and communication technology, digital products have developed from simple text to pictures and texts, such as images, videos and streaming media. With the advancement of perception technologies such as images and videos and the popularization of acquisition methods, the number and types of these digital media are increasing substantially, becoming an important part of network information. Because these digital media have the characteristics of copying without distortion and being easy to edit and modify, while bringing information and providing better services, they have also caused many problems such as copyright disputes, content authenticity, and inform...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00H04N1/32
Inventor 赵耀李晓龙常琪
Owner BEIJING JIAOTONG UNIV
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