Watermarking Algorithm Based On Wavelet Transform

Recently, multimedia copyright has become very important following the merge of the developing IT, electric-business and multimedia in the business. A lot of researchers in abroad have proposed series of new thought in security information, especially, acknowledge copyright and information inside-insert. This information hiding and digital technology is a kind of new thought of digital media protection. The situation is being given rise to the human interest and attention. We study watermark is embed in one image, watermark attacked and the whole watermark system designed. The algorithm is raised on wavelet transform.The paper absorb the spirit that some researchers put for different words that watermark should be embed in low frequency or middle that or high that. The writer proposes that watermark should be distinguished to handle in three areas by according to the situation through wavelet analyzed. This improves the robustness of the algorithm. Meanwhile, the wavelet transform and human sight model are connected and determine the factor quantity adaptable. The factors assure to avoid the decrease of image when watermark is embedded. The algorithm has strongly robustness and has defended the ability of image compressed and cut.