Satellite data transmission method based on image information hiding
A technology for satellite data and transmission methods, applied in the field of communication, can solve the problems of poor quality of dense images and low capacity of information hiding methods, and achieve the effects of improving robustness, improving the quality of carrier images, and improving anti-compression capabilities.
Active Publication Date: 2014-09-24
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology
[0007] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a satellite data transmission method based on image information hiding, and to solve the problems of relatively low capacity of current information hiding methods and relatively poor quality of dense images, While ensuring the accurate transmission of secret information, it does not affect the quality of use of the entire data transmission system
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[0052] In order to verify the performance of the algorithm proposed in this paper, the experiment uses a number of 8-bit grayscale images with a size of 512×512 for simulation, and the block size is 32. Here, only the test images for the simulation of the present invention are given. After hiding the secret information The degree of change of the carrier image is represented by the peak-to-voice ratio (PSNR), and the peak-to-voice ratio (PSNR) can reach more than 30dB.
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The invention discloses a satellite data transmission method based on image information hiding. According to the satellite data transmission method based on image information hiding, carrier images are classified according to the blocking characteristics of the carrier images, information to be transmitted is divided into groups of different lengths and is embedded into different types, and different types of image blocks are embedded with different capacities by adopting different sub-image partition methods, thereby realizing hidden transmission of high-capacity, anti-compression and high-restoration-quality. A satellite data transmission system based on image information hiding comprises a satellite information grouper, a carrier image classifier, a multi-information hider, a satellite data transmitter, a ground data receiver and a ground hidden information extractor. Hiding of information is realized through the multi-information hider, and the efficiency and security of satellite data transmission are increased and improved under the condition of not increasing the transmission rate.
Description
technical field [0001] The invention relates to an image communication method, in particular to a satellite data transmission method based on image information hiding, and belongs to the field of communication (such as data communication technology, etc.). Background technique [0002] With the development of science and technology, people's demand for satellite data transmission is increasing, and using the existing data transmission system to transmit more data is the goal pursued by people. If the satellite data (secret information) is hidden in the satellite data transmission system (mainly image data) for transmission, the security and secrecy of satellite data transmission can be improved without increasing the transmission rate (or without increasing the amount of transmitted data). The quality of information transmitted. [0003] At present, the international satellite image data hiding methods and systems have the following problems: [0004] 1) The hidden capacit...
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IPC IPC(8): H04N19/46H04N1/32
Inventor 周诠黎军张怡呼延烺李静玲崔涛魏佳圆梁薇
Owner XIAN INSTITUE OF SPACE RADIO TECH