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Self-adaptive reversible information hiding method based on pixel replacement

An information hiding and self-adaptive technology, applied in image coding, image data processing, image data processing, etc., can solve problems such as inability to guarantee human-readable ciphertext, large key size, etc.

Inactive Publication Date: 2018-03-20
ZHEJIANG UNIV OF FINANCE & ECONOMICS
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the wide application of text encryption technology in the field of network security, its shortcomings are becoming more and more obvious. For example, there are more and more cracking analyzes for text encryption, and the key size required for text encryption is getting larger and larger. There is little guarantee that the ciphertext is also human readable

Method used

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  • Self-adaptive reversible information hiding method based on pixel replacement
  • Self-adaptive reversible information hiding method based on pixel replacement
  • Self-adaptive reversible information hiding method based on pixel replacement

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Experimental program
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Embodiment Construction

[0078] The specific steps of the adaptive reversible information hiding method based on pixel replacement are:

[0079] Step 1: Embeddable Pixel Pair Search

[0080] Embedded Pixel Pair (EPP) is a dense-bit embedding unit proposed by the algorithm in this paper. In the spatial domain, the grayscale carrier image can be regarded as a rectangular array composed of pixel grayscale values ​​arranged in a certain order. First, if figure 1 As shown, the array is divided into several non-overlapping 2×3 pixel blocks.

[0081] If a small part of pixels cannot constitute a 2×3 pixel block due to the size of the carrier image, then no subsequent processing will be performed on this part of the pixels. Therefore, assuming that the pixel size of the carrier image is M×N, the calculation formula for the number of pixel blocks n is as follows:

[0082]

[0083] Then, each bit of the pseudo-random binary sequence (key) shared by the sender and the receiver is assigned to each pixel blo...

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Abstract

The invention relates to a self-adaptive reversible information hiding method based on pixel replacement. According to the method, a more effective embeddable unit is constructed, differentiation encoding is conducted on the gray level trend of an embeddable region of the embeddable unit according to characteristics of different carrier images, and finally information is embedded through pixel replacement. According to the algorithm, according to embeddable conditions, the embedding capacity is improved while overlarge influences of the steganography process on the visual quality of the imagesare avoided. Besides, the embeddable pixel pair self-adaptive re-encoding process based on the gray level trend characteristics is added, and the algorithm embedding capacity is improved to the largest extent. Finally, the mil is embedded in a pixel replacement mode, so that the algorithm has a gray level histogram stability.

Description

technical field [0001] The invention relates to an adaptive reversible information hiding method based on pixel replacement. Background technique [0002] With the wide application of text encryption technology in the field of network security, its shortcomings are becoming more and more obvious. For example, there are more and more cracking analyzes for text encryption, and the key size required for text encryption is getting larger and larger. There is little guarantee that the ciphertext is also human readable. Therefore, in order to meet the higher requirements of information security, image information hiding, also known as image steganography, has become a new hot spot in the field of network security. [0003] According to whether the algorithm is reversible, image information hiding can be divided into reversible information hiding and irreversible information hiding. Reversibility means that the steganographic image can be restored to the carrier image before the ...

Claims

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Application Information

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IPC IPC(8): G06F21/60G06T1/00G06T9/00
CPCG06F21/602G06T1/0028G06T9/005
Inventor 王继林冯小青孙啸
Owner ZHEJIANG UNIV OF FINANCE & ECONOMICS
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