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Compressed image steganography encoding method based on AMBTC high and low average optimization

A technology of compressing images and high and low average values, which is applied in the field of information security and can solve problems such as image quality degradation

Inactive Publication Date: 2015-01-14
ANHUI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Replacing the smooth block bitmap with the data to be embedded is a good idea to ensure the steganographic capacity of the BTC domain, but at the same time the image quality is also seriously degraded. Under the premise of ensuring the capacity, how to obtain the optimal solution of the high and low mean values ​​that match the embedded data To improve image quality is a new idea

Method used

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  • Compressed image steganography encoding method based on AMBTC high and low average optimization
  • Compressed image steganography encoding method based on AMBTC high and low average optimization
  • Compressed image steganography encoding method based on AMBTC high and low average optimization

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Embodiment 1

[0053] Such as figure 1 and figure 2 As shown, the specific steps of this embodiment are as follows:

[0054] Embedding of data:

[0055] For example Figure 5a The 8×8 grayscale image shown is AMBTC compression coded, the result is as follows Figure 5b As shown, four image blocks are obtained: (161,162, B 1 ), (157,162, B 2 ), (157,162, B 3 ) and (158,161, B 4 ), set the threshold T=1, when the block parameters satisfy h i -l i When ≤ T, it can be determined that the image block is a smooth block. It can be seen that in this embodiment, the block (161, 162, B 1 ) is a smooth block, and Figure 5b An unpacked image such as Figure 5c shown.

[0056] will be like Figure 5d The 16-bit data to be embedded is embedded into the smooth block (161,162, B 1 ), the specific steps are as follows:

[0057] Statistical bitmap according to formula (4) B 1 = { b i 1 ...

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Abstract

The invention discloses a compressed image steganography encoding method based on AMBTC high and low average optimization. According to the compressed image steganography encoding method disclosed by the invention, after the smoothness of an image block is evaluated, data are embedded in smooth blocks one by one to obtain a stego image, wherein the data embedding comprises two steps: replacing a binary bitmap by the data, and optimizing high and low averages according to the embedded data and an original bitmap. With the adoption of the compressed image steganography encoding method, the computing is simple, the method is easy to realize, and a receiving side only needs to directly take out a bitmap of a receiving side, namely the embedded data, by discriminating the smooth blocks according to a secrete key; in addition, requirements on computing resources are low, and the use is convenient, so that the compressed image steganography encoding method has a good application prospect in the real-time field, mobile terminals with limited computing resources, and the like.

Description

technical field [0001] The invention relates to the fields of information security, secure communication and multimedia applications, in particular to a steganographic coding method for compressed images based on the optimization of AMBTC high and low average values. Background technique [0002] Modern information steganography technology is an important direction in the field of information security in the digital information age. Data steganography technology uses the coding redundancy and structural redundancy of digital media itself, as well as the insensitivity of human sensory organs, to hide data in carrier data. , the carrier signal can be text, image, video, audio, etc. Steganography technology can be further combined with cryptography, information processing technology, network technology, physiology and psychology and other multi-disciplinary fields, and has broad application prospects in industry, business and military circles, such as covert communication, info...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/46H04N19/467H04N19/154
Inventor 殷赵霞洪维恩王良民马猛夏彦曹泽坤牛雪静
Owner ANHUI UNIVERSITY
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