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Processing method of image latent writing based on auxiliary pixel

A technology of auxiliary pixels and processing methods, applied in the field of information security, to achieve the effect of improving carrier utilization and embedding capacity

Inactive Publication Date: 2009-06-10
WUXI HUASAI INFORMATION TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0009] Existing steganographic algorithms have a lot of room for improvement in terms of information embedding capacity and robustness of steganographic algorithms

Method used

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  • Processing method of image latent writing based on auxiliary pixel
  • Processing method of image latent writing based on auxiliary pixel
  • Processing method of image latent writing based on auxiliary pixel

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Experimental program
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Embodiment Construction

[0040] specific implementation plan

[0041] The present invention will be further described below in conjunction with accompanying drawing and example.

[0042] 1 Information embedding steps

[0043] In the embedding process, firstly, the pseudo-random number generator generates a pseudo-random number sequence, and uses the pseudo-random number sequence to randomize the bit stream of the original secret information to be embedded as the secret information bit to be embedded. In addition, an 8-bit pseudo-random number sequence is generated to generate a binary sequence of auxiliary pixel gray value a, which is in one-to-one correspondence with the binary sequence of pixel gray value p of the carrier image.

[0044] Such as figure 1 As shown in (a), the 8-bit auxiliary pixel gray value a generated by the pseudo-random number generator and the pixel gray value p of the carrier image are converted, and p is p 7 p 6 p 5 p 4 p3 p 2 p 1 p 0 , a is a 7 a 6 a 5 a 4 a 3 a...

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Abstract

The invention relates to an auxiliary pixel-based image steganographic processing method, which embeds two pieces of secret information into one pixel of a carrier image at the same time. The method comprises: using integer pseudo random number between 0 and 255 generated a pseudo random number generator as a gray value of an auxiliary pixel; embedding the two pieces of secret information into the gray value of the carrier image and an auxiliary pixel value; and transferring the information of the auxiliary pixel value to a pixel value of the carrier image. The invention has the advantages of greatly improving embedment capacity due to the embedment of two pieces secret information into one pixel, improving the utilization rate while keeping a certain embedment rate, improving the encryption capacity of the algorithm due to the adoption of a pseudo random sequence for scrambling steganographic information and generating the auxiliary pixel, increasing the difficulty in the extraction of the secret information from the a steganographic image and improving the anti-attack ability of the algorithm.

Description

technical field [0001] The invention relates to an image steganography processing method based on auxiliary pixels (AP_LSB, AuxiliaryPixel LSB), which belongs to the technical field of information security. Background technique [0002] Information hiding is to embed additional information into digital media, such as digital images, to achieve covert communication without excessively affecting the carrier signal. The most common method of information hiding technology is the LSB (Least Significant Bits) embedding method. It transforms the secret information into a binary data stream, and then replaces the lowest bit of the pixel gray value of the carrier image respectively. Since the modification of the LSB plane (the plane composed of the lowest bits of the binary description of all pixels) has the least impact on the gray distribution of pixels, this method hides a large amount of data and is not easy to be detected by the senses, so it is widely used in practice. The me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 周治平惠卯卯康辉
Owner WUXI HUASAI INFORMATION TECH
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