A reversible information hiding method based on ambtc compression technology and Huffman coding
A technology of Huffman coding and information hiding, which is used in image communication, digital video signal modification, electrical components and other directions to achieve the effect of improving security
Active Publication Date: 2022-04-22
绍兴聚量数据技术有限公司 +1
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Problems solved by technology
The above methods generally use the relationship between two quantized values to select the information hiding block, and seldom think purely from the perspective of the statistical characteristics of the bitmap to select the hideable information block.
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[0076] In this embodiment, reversible information hiding is carried out according to the aforementioned steps S1-S8, and the specific results are shown as follows:
[0077] Table 1 shows that when the average threshold TH is 7, the information hiding ability of each test image is the highest, about 40000 bits. In Table 1, the average code length is 7 bits, and the bitmap is 16 bits, so each embeddable bitmap has 9 bits available for secret information hiding. The amount of secret information in this scheme is equal to the total amount of secret information minus the number of compressed code bits of the Huffman code table, that is, S=S A -R. There is a certain trade-off relationship between the visual quality of the image and the amount of information hiding. When the hidden capacity of the scheme shown in Table 1 is the largest, the visual quality of the image is low, but Figure 6 Eight steganographic images are shown, and the image quality of the visible steganographic im...
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The invention proposes a reversible information hiding method based on AMBTC compression technology and Huffman coding. First, use AMBTC to compress the original grayscale image, and each block has two quantization levels and one bitmap. Next, the bitmap of each block is converted to a decimal number, which is used to calculate the frequency of occurrence of the decimal number. A user-defined threshold is used to classify blocks into two cases, embeddable blocks and non-embeddable blocks. If the frequency of the decimal number is greater than or equal to the threshold, the corresponding bitmap is embeddable and then compressed using Huffman coding technique. If the frequency of a decimal number is less than the threshold, the corresponding bitmap is not embeddable. The invention uses the Huffman code to replace the original bitmap, freeing up the remaining space of each block bitmap for embedding secret information. Compared with other methods, this method has a better amount of information hiding and acceptable image visual quality.
Description
technical field [0001] The invention belongs to the field of information reversible hiding, in particular relates to a compressed domain, and proposes a reversible information hiding method based on AMBTC compression technology and Huffman coding. Background technique [0002] With the rapid development of multimedia technology, everyone can access various multimedia information resources more conveniently and faster, including audio, video, text files, images and other information. However, this has also brought about many information security issues, including tampering of image information, malicious attacks and interception of public digital information, etc. In order to solve these problems, experts and scholars have proposed many digital data hiding schemes in recent years. [0003] Data hiding refers to embedding secret data that needs to be protected in the carrier, and passing the secret information to legitimate users and authorized institutions through public cha...
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IPC IPC(8): H04N19/91H04N19/467H04N19/184
CPCH04N19/91H04N19/467H04N19/184
Inventor 夏婷婷张靖群林娟吕慈纯李黎陆剑锋张善卿
Owner 绍兴聚量数据技术有限公司