Research On Irreversible Blind Watermarking Algorithm Based On Visual Cryptography

With the development of Internet technology,digital watermarking technology has become one of the important solutions for digital copyright protection.In view of the fact that the non-blind watermarking algorithm in digital watermarking technology needs the protection of a third party,which is not secure compared to the blind watermarking while the blind watermarking algorithm has reversible characteristics,this research combines the non-blind watermarking algorithm with the blind watermarking algorithm to apply the irreversible algorithm to the blind watermarking algorithm.In watermarking,visual cipher,repetitive code,DCT conversion and Schur technology are simultaneously used to realize an irreversible blind watermarking algorithm that does not require third-party protection.First,use the vision system channel to decompose the image,perform DCT transformation and Schur decomposition on the original image,get the feature matrix to be embedded in channel one(R),and use the DCT intermediate frequency domain exchange method to embed the feature matrix into channel two(G).Secondly,the watermark information is embedded in the first channel(R)and the third channel(B)with a specific embedding coefficient and embedding strength.finally,the first channel(R)is subjected to Schur decomposition to obtain the feature matrix,which is used with the second channel(R).The channel(G)decomposes the feature matrix,and extracts the watermark information through specific embedding coefficients.At the same time,the watermark is extracted in the third channel(B)by embedding the strength coefficient,and the best way to extract the watermark is selected by voting.After comparative experimental research,this method of solving the above problems has a normalized correlation coefficient of about 99%,and a false alarm rate of about 0.5,so it has better robustness and higher security.There are 20 figures,6 tables and 60 references in this paper.