Research On Color Zero Watermarking Algorithm Based On RGB Space

As an important carrier of current information exchange,color image is great significance for copyright protection.Zero watermarking has a very good advantage in solving the problem of content integrity,and the promotion of zero watermarking of color images has become a key technology for copyright protection.Aiming at the problems of against the poor robustness of traditional zero watermarking algorithms,a color zero watermarking algorithm based on RGB space is proposed,firstly,in order to obtain the binary feature matrix of the three components of a color image,Arnold scrambling and block processing are performed on each of the three components,and then the average value of each sub-block in each color component is calculated to form a decimal mean matrix.Each decimal number in the average matrix is represented by a binary number,and finally a binary feature matrix is generated.At the same time,three color watermark components are obtained by color separation of the color copyright labels,and then Arnold scrambling is performed on them,and each color component is converted into 8-bit binary watermark information.Finally,the three watermarks are bitwise XOR with the three binary feature matrices of the carrier image to generate three binary zero watermarks.The three binary watermarks are converted into a decimal zero watermark using inverse encoding technology,and three decimal zero watermarks are generated.Coincidence can result in a color zero watermark,and the color zero watermark is registered to copyright protection center.Seven color images with different structural information are selected as the carrier image,and the color copyright identification is selected as the watermark image for simulation experiments.The false alarm rate experiment,geometric attack,non-geometric attack and combined attack experiment are mainly performed.Experimental results manifest that compared with the existing zero-watermarking algorithm,this algorithm has a good advantage against robust attacks and has better security.