AMBTC-based modulo 2 operation and Hamming code information hiding method

An information hiding and Hamming code technology, applied in the field of compressed domain information hiding, can solve problems such as image visual distortion, reduced visual quality of hidden images, and edge block effects.

Active Publication Date: 2019-09-27
绍兴聚量数据技术有限公司
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Problems solved by technology

In 2006, Chuang et al. proposed a steganographic algorithm with high payload based on BTC images, but the visual quality of steganographic images will be significantly reduced
Although the Hammi...

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  • AMBTC-based modulo 2 operation and Hamming code information hiding method

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Embodiment Construction

[0048] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Based on the modulo 2 operation of AMBTC and the information hiding method of Hamming code, the specific steps are described as follows figure 1 Shown in S1~S6. Among them, the codec of AMBTC is as follows figure 2 As shown, the specific steps of the method are described as image 3 Shown:

[0049] Step 1: Divide the original grayscale image GI to be embedded with secret information into n×n non-overlapping sub-image blocks. For the original grayscale image GI in this embodiment, see figure 2 , set n=4, the size of each sub-image block is the same.

[0050] Step 2: Obtain the triple representation (a, b, B) of each sub-image block in the GI according to the AMBTC compression coding, where a and b are the high and low average values ​​of the color quantization level respectively, that is, the high quantization level and the low ...

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Abstract

The invention provides an AMBTC-based modulo 2 operation and Hamming code information hiding algorithm. Firstly, classifying AMBTC compressed codes with different complexities, and adopting different embedding strategies; secondly, in the smooth block, performing modulo 2 division on the secret information and the high four bits of the two quantization levels to obtain a quotient and remainder replacement bitmap; taking low three bits of the two quantization levels, respectively embedding secret information added to the two bits by using Hamming codes (3 and 2), and if the modified quantization level is still in a smooth block range, replacing the original quantization level by using the modified quantization level; thirdly, in the complex block, embedding a bit of secret information by exchanging the sequence of two quantization levels and flipping a bitmap; and finally, obtaining an AMBTC image embedded with secret information according to the AMBTC code. The method not only inherits the advantages of low AMBTC calculation complexity and easy realization, but also is superior to other existing methods in the aspect of embedding capacity, and the hidden image has better visual quality.

Description

technical field [0001] The invention belongs to the field of information hiding in the compressed domain, and specifically relates to an information hiding method based on AMBTC modulo 2 operation and Hamming code. The method can hide information in the AMBTC format in the compressed domain, increase the security of compressed files, and ensure Under the premise of quality, the hidden capacity has been greatly improved. Background technique [0002] With the rapid development and application of the Internet, digital images are widely disseminated and used in various fields, which puts forward new requirements for digital image processing technology. On the one hand, digital images contain a large amount of redundant data, which is a burden on storage and transmission. Therefore, digital images need to be compressed before transmission. On the other hand, in order to protect some important information, digital images are often used as carriers to carry secrets. This is infor...

Claims

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Application Information

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IPC IPC(8): H04N19/467H04N19/46H04N19/176
CPCH04N19/176H04N19/46H04N19/467
Inventor 李黎何敏郭小云苏圣琦孙冕程伟玲
Owner 绍兴聚量数据技术有限公司
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