Research On Digital Media Information Hiding Technology

Digital media has a great application with the development of web and multimedia technology. In order to protect the safety of digital media, information hiding and pretensions has been a hot topic in the world. This paper proposed a watermarking method to resist JPEG compression, a new image information hiding method through JPEG carries, an English text compression algorithm, an encryption algorithm of color image and an algorithm of watermarking, these algorithms are all based on Fibonacci series and Quaternion. The mainly work of this paper contains five parts as follows:1) The new watermarking method to resist JPEG compression is based on integer Fibonacci expression and rabbit sequences. This algorithm conveniently solved the conflict of image compression quality and watermarking robust, and the algorithm has good robustness to JPEG compression.2) Image information hidden methods used JPEG as its carries mainly solved a technical problems that hidden data cannot be extracted nondestructively in JPEG carries information hiding, we greatly improved the hidden capability in the premise of assurance the JPEG carries visual quality, and we developed folder and database a bulk hidden software, and completed the Department of Country Safe assignment perfectly.3) English text compression algorithm based on Fibonacci coding can express the frequency characters with less bits. The result shows that the algorithm has good compression rate, and the longer the text, the higher frequency the character, and the high compression rate.4) Color image digital watermarking algorithm uses pure quaternion to express the three channels of the color image. Through Quaternion Fourier Transform, we corrected the mid-low frequency coefficient to embed the watermarking information. The result shows that the algorithm has good robustness to usual cut, noise and JPEG compression.5) In the course of information transform, information encryption is very important. We proposed a color image encrypt algorithm by using quaternion rotation. Its secondary encryption, the complexity and random of the encryption key assurance the algorithm has stronger security.This paper proposed five new information and disguise algorithms by studying Fibonacci and Quaternion. It has great significance to the information hiding technology.