Research on Application of Reversible Digital Watermark Algorithm

For many years information hiding has captured the imagination of researchers. Digital watermarking and steganography tools are used to address digital rights management, protect information, and conceal secrets. This paper study the immunity digital watermark algorithm, which also revises Tian algorithm, it propose expands the lossless digital watermark algorithm based on the error correction control code´s differential value. This algorithm avoided the picture quality which was nonessential to the image revises brings dropping. It has the distinct enhancement including the India picture quality. The reversible digital watermark may use in the digital product the promotion.