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Self-adaptive reversible information hiding method based on JPEG image

An information hiding and self-adaptive technology, applied in the field of information security, can solve the problems of image information reversible information hiding design difficulties, prior knowledge is not considered, reversible information hiding technology has no reference value, etc.

Active Publication Date: 2019-06-28
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, compared with uncompressed images, JPEG transforms the signal from the spatial domain to the frequency domain, discarding high-frequency information, and the reduction of image information makes it difficult to use image redundancy for effective reversible information hiding design
On the other hand, prior knowledge about uncompressed images does not consider the impact of quantization and entropy coding in JPEG, and has no reference value for JPEG-based reversible information hiding techniques

Method used

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  • Self-adaptive reversible information hiding method based on JPEG image
  • Self-adaptive reversible information hiding method based on JPEG image
  • Self-adaptive reversible information hiding method based on JPEG image

Examples

Experimental program
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Embodiment 1

[0045] figure 1 It is a flow chart of an adaptive reversible information hiding method based on JPEG images in this embodiment, figure 2 For the overall block diagram of the embedding process of this embodiment, refer to figure 1 and figure 2 , the method includes:

[0046] S1 generates multiple histograms according to the quantized discrete cosine transform (Discrete Cosine Transform, DCT) coefficients of the JPEG image.

[0047] The quantized DCT coefficients are divided into DC coefficients (Direct current coefficients, DC) and AC coefficients (Alternating current coefficients, AC), and the obtained JPEG image quantized DCT coefficients are divided into multiple 8×8 sub-blocks, according to The Z-type scanning sequentially counts the first multiple AC coefficients of each sub-block, and correspondingly generates multiple histograms. The first plurality of AC coefficients here are the low-IF region of the sub-block. Usually, the quantization step size corresponding to...

Embodiment 2

[0091] This embodiment is a simulation example of an adaptive reversible information hiding method based on a JPEG image. Adopt the self-adaptive reversible information hiding method based on JPEG image of the present invention to obtain following result:

[0092] The following tables 1 and 2 are the best parameter sets for different images when the quality factor is 90 when the given embedding capacity is 10,000bits and 20,000bits, respectively. Table 3 and table 4 are the given embedding capacities of 10,000bits and 20,000 respectively. The best set of parameters for different images at a quality factor of 70 in bits.

[0093] Table 1

[0094]

[0095] Table 2

[0096]

[0097] table 3

[0098]

[0099]

[0100] Table 4

[0101]

[0102] 70 and 90 are common JPEG compression quality factors in program applications, which are more representative. Among them, the parameter ∞ indicates that the histogram is not modified, because keeping the histogram unchang...

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Abstract

The invention provides a self-adaptive reversible information hiding method based on a JPEG image, and the method comprises the steps: generating a plurality of histograms according to discrete cosinetransform coefficients after the JPEG image is quantized; determining an optimal modification parameter of each histogram in the plurality of histograms; and according to the optimal modification parameter, modifying the DCT coefficient corresponding to each histogram, and embedding the information and the DCT coefficients into the carrier image to obtain the marked JPEG image. By adopting the method provided by the invention, the visual quality and the embedding capacity of the carrier can be improved while the size of the JPEG file is not increased as much as possible.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to an adaptive reversible information hiding method based on JPEG images. Background technique [0002] With the wide application of digital multimedia technology and the popularization of the Internet, people can not only download and copy digital media information through the network conveniently, but also modify the original data content with powerful multimedia tools. Therefore, a series of potential information security problems such as copyright protection, information integrity certification, authenticity certification and unauthorized copying have been brought about. Currently, there are many ways to help keep information safe from attacks and reduce the risk of information being exposed to unauthorized persons. Among them, an important method is information hiding, which uses the redundancy of digital media information to pre-embed some secret information into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/32
Inventor 赵耀李晓龙肖梦瑶
Owner BEIJING JIAOTONG UNIV
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