The Algorithm Research Of Information Hiding Based On Image Segmentation And Wavelet Transformation

Following with development of information technology, information security receives more and more emphases. Information hiding technology can hide secret information in the non-secret information (such as audio, video, static graphics and text) thus people will have no sense with the change about the information hiding carrier. In recent years, information hiding technology has a high speed development, people proposes many information hiding method and algorithm. Now information hiding technology has already had widespread application in multimedia information copyright protection and information security etc..Along with development of information hiding technology, people proposed various information hiding method and plan. Classifies by hiding technique, these methods may divide into spatial domain and transform domain method. Spatial domain algorithm is simple and can hide amount of information but algorithm robustness is bad, the secret message can be very easily destroyed by the filter, the image quantification, the transforming geometry. Transform domain algorithm has the strong anti- attack capability, but this kind of algorithm has more complex operations on hiding and withdrawing information, so the quantity of the secret information cannot be very big.This paper researches the algorithm and application of information hiding, the algorithm of information hiding based on picture division and wavelet transformation, information hiding algorithm was proposed. The works are following:(1) Research the essential feature, principle and present domestic and international research current situation of information hiding., including classification of the information hiding, have summed up the basic frame of the information hiding system. Generality has learned the common information hiding algorithm at present. And study Wavelet Transform definition, Continue Wavelet Transform and Discrete Wavelet Transform.(2) According to the characteristic of spatial domain and wavelet domain, the algorithm of information hiding based on picture division and wavelet transformation information hiding algorithm was proposed. First, a hidden picture is Arnoldtransformed,the main picture is divided into n X n regions in which discrete wavelet transformation is used for three times. Then the hiding information is embedded into the middle frequency sub-band and the high frequency sub-band in every region by using algorithm, the robustness can be increased by using information hiding in places.(3) According to the algorithm the simulation experiment is carried out, and the picture embedded information undergoes various attacking testing .The corresponding modulus has fallen down , but the watermark still can be detected. The experiment shows that the embedded information has invisibility and fair robustness.