The Study In Digitial Watermarking Algorithm Based On Wavelet Transform And The Capacity Of Watermarking

Digital image watermarking technology is a new field of research in our country and abroad,which put watermark information used to inspect into digital image,it is used to prove ownership of the media or completeness of information,and by its detection to track the spread of the image,in order to prevent piracy of image. Although watermarking has been used in commercial software, but its robustness and watermark capacity remains to be further research.In this paper,choose static images for the study,on the robustness and capacity of lines studied , by analysis the classic algorithm of digital watermarking and it's capacity,use discrete wavelet transform as the tool of image procession,as while as considering the embed place and the embed strength of digital image watermarking and the choosing the capacity of the watermarking.Firstly ,in this paper , a high-capacity digital image watermarking algorithm is proposed by discrete wavelet transform. The algorithm makes meaningful binary image watermarking by Arnold scrambling transformation,gets the scrambling image of watermarking with safety,uses the advantage of wavelet transform to decompose the original image by wavelet of Haar in image processing,through fusion embedded way,put information of watermarking into the subband of wavelet decomposition.Secondly,the experimental results show that large capacity watermarking information is embed in original image,still on the shear, compression and noise attacks with robustness,the simulation results are given as follow,prove that the algorithm has good prospects.At last,in view of current the methods in capacity of digital image watermarking are compared as channels of watermarking system,transmission through analog channels to calculate the size of the watermarking can be embedded in the capacity of the channel,therefore, the results obtained smaller. In this paper,Weber-Fechner's law is used into the area of image watermarking,a method is based on the threshold of wavelet coefficients in a vector image and the threshold of the vector image which is used to solve watermarking capacity calculation. The method uses the human eye determined by Weber's law can feel change in the amount of visual threshold projected empirical formula for calculating the watermarking capacity. Experimental results show that the method for calculating the capacity of still image watermarking proposed a new method.