Research On Colour Digital Image Information Hiding Algorithm

Following the information age's coming, Network technology has permeated all fields, transmitted in the network is not only characters information, more and more is multi-media information(conclude voice,image,video and so on), and multi-media information interchange become more and more plentiful. In the meantime, while the network offer convenience for the people also deliver the insecurity shadow. Information leaking and faking, lawless embezzling and distorting in the electronic commerce, encroaching copyright in the multi-media works, lawless people invading and so on. Information security has become influencing personal interest,society stabilization,country safety's important problem.In this terrain, has fake character's new information security technology ----information hiding technology emerge as the times require, become protecting the multi-media's effective method.In this paper, on account of traditional secret image hiding method, we hide colour secret image in colour carrier image's space region and alternate region and propose a dual colour secret image hiding method. In this paper, the main research content and as following:We use the common space region hiding algorithm , DCT region hiding algorithm and DWT region hiding algorithm to do some simulate experiment.The secret image information is multiple iterational mixed into the carrier image can completely hide the secret image information into the carrier image, The mixed image is scrambling encrypted. Based on the middle frequency wavelet region embedded hiding algorithm. Get through simulating and doing some experiment the algorithm in this paper put forwarded and space region hiding algorithm and DCT region hiding algorithm, the result indicate that this algorithm has improved in hiding character,hiding information volume and resist statistics and analysis ability, therefore has good practical value. The innovating achievement of this paper is we propose a dual colour secret image hiding method. First of all, we iterational mixed the secret colour image into the colour carrier image one by the logistic chaos order, this is the first hiding. Then we bidirectional Arnold disordered the mixed image, we embed the disordered image into colour carrier image two by discrete wavelet transforming, achieve deep hiding's aim. In the meantime, this hiding algorithm has very good conceal character, also can resist histogram statistics analysis.