A Lossless and Visible Watermarking Algorithm

A loss less and visible watermarking algorithm is proposed. The carrier image can restored loss less. The exterior appearance is like to mark by use of image addition technique. The visible watermarking can replace the mark. Because of self-recovery, it offers the original data to the validated user. The Hash function of RH arithmetic operator is constructed by Rijndael encryption algorithm. By using this kind of arithmetic operator, the 1 bit error can be spread to the entire image. It is shown that a wide prospect for this algorithm can guarantee the quality of the image and the safety of the watermark.