The Research On Digital Watermarking Algorithm Of Colorful Image Based On FCM And SVD

The watermarking technology has gotten rapid development with the great progress and wide application of multimedia technology and become an hot topic in the field of today's multimedia security.Digital watermarking is a technology that it inserts some certain invisible digital information,so-called watermarking,into the multimedia data like image and video and so on.As a result,we can protect the authenticity of and the exclusive copyrights to digital products.The watermarking information can be all sorts of digital information such as text and logo and image and trademark and the like.When the watermarking is being embed,it couples tightly to the media data and is hidden and becomes an inseparable part of media data.Advantages of this technology are that watermarking information will not cause any influence on the data to display and lead the quality of media data to reduction and do harm to its value in use and the inserted watermarking will not be eliminated or lost after the special Treatment to multimedia data.In this paper,we do the research on the DWTSSIM that is applied to the protection of Graphics copyrights and analyze the principles of digital watermarking,and then point out the following two types DWTSSIM algorithm of digital watermarking,based on the disadvantages of the present digital watermarking technology:The first algorithm is digital watermarking algorithm of colorful image based on human visual masking properties and adaptive chaotic encryption.With human visual system as the foundation,using the fuzzy clustering algorithm,establish reasonable fuzzy rules,combining with the characteristics of image and adaptive watermark,and dynamically modulate the watermark strength.The algorithm adopts the integer wavelet transform,the image of three-level wavelet decomposition,the LH2,HH2 area(radius 3 tiles)to be partitioned,with fuzzy algorithm to choose suitable for watermark embedded wavelet blocks,on the choice of the wavelet blocks and serial number,select embedded watermarking chaotic sequence wavelet blocks,fuzzy clustering algorithm is used to calculate each block of the watermark embedding strength,finally realizes the watermark embedding.The second algorithm is a kind of color image based on singular value decomposition(SVD adaptive digital watermarking algorithm,adaptive selection of watermark embedding by FCM wavelet blocks,and then to select the wavelet block SVD decomposition of singular value of each block,the singular value of the sort,and select one of the largest singular value.Using the chaos sequence scrambling,finally realizes the watermark embedding.This paper gives the algorithm to perform a number of experiments,and the results of performance analysis.The experimental results show that these two algorithms have good robustness,but also a good guarantee the invisibility of the watermark.