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Research and Application of Fractal Image Coding in Information Hiding

Author: ShengZhong
Tutor: ZhengHongYuan
School: Nanjing University of Aeronautics and Astronautics
Course: Applied Computer Technology
Keywords: Fractal coding Information Hiding Human vision system Quadtree Color images Secret communication Robustness
CLC: TN919.81
Type: Master's thesis
Year: 2009
Downloads: 45
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Abstract


The rapid development of the computer network , making the exchange of multimedia information on the network has reached an unprecedented breadth and depth , convenient information exchange also brings the hidden aspects of information security , the traditional cryptography can no longer meet the needs of the current information security . Information hiding technology can be embedded in the digital information of the information can not be perceived , and conceal behavior of the important information is being transmitted to a large extent, improve the security of the information to be transmitted . In this paper, on the basis of the analysis the secret image information of the transmission network security issues for the current image information hiding system to hide information based on fractal image coding system . The system uses hiding algorithm based on fractal coding transform domain , composed of the secret image pre-processing module , the information embedded module , information extraction module , can solve the secret transfer of image information security issues . First of all , on the basis of analysis of the conventional image quadtree segmentation , the characteristics of the human visual system (Human Visual System: HVS) is introduced into the range blocks quadtree division , combined with the color image of R , G, and B three ideological component correlation coding , a use HVS color image fractal coding algorithm , experiments show that in the same compression ratio , the fractal image coding , the proposed algorithm than traditional algorithm can get better images quality , coding time is better than the traditional algorithms . Second, the fractal image coding algorithm based on the use of the HVS based on HVS shaped image coding of information hiding algorithm proved by experiments that the proposed algorithm has good transparency of JPEG compression , adding noise , image sharpening and fuzzy image filtering , image geometric distortion attacks have better robustness . Finally, the environment based on Visual C 2005 and PowerBuilder 9.0 platform , designed and implemented the system and initially applied to a shipping company ship management system , proved in normal circumstances , there are third-party interception , interference attack the successful completion of the secret communications .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication > Image coding
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