Research On Image Digital Watermarking Algorithm Based On Chaotic Theory And Wavelet Transform

With the rapid development of Internet and digital media, which greatly promotedsocial progress, and convenient for people to use digital equipment to deal with images,text, voice and other media information, However, due to digital with accurate,large-scale replication features, which makes unlawful attacks have a chance to attack,brought a new challenge-copyright issues. Copyright protection way of digitalwatermarking seems to have become an urgent problem. Copyright effective digitalwatermarking technology embedded into the original works, without affecting the useand aesthetic value of the original works, so this technology as an effective copyrightprotection means has attented and researched by most of sholars.First of all, digital watermarking technologyis generalized of the system, followedby two aspects of digital watermarking algorithm from chaos theory and discretewavelet transform. Color image watermarking algorithm based on chaos theory andwavelet transform based on the basis of the above theory, it is the advantage that thewatermarking is encrypted with chaotic way before embed. the security of thewatermarking algorithm is increased and the invisibility of the watermarking isimproved by using advantage of chaotic systems initial sensitivity and the large keyspace., Finally a series of simulation studies by using Matlab on the proposed algorithm,experiments show that the algorithm has good robustness and invisibility.