Based On The The Shamir Theory In The Wavelet Domain Chaotic Digital Watermark

Network and multi-media have made a great progress. That makes the information exchange and media copying easier and easier. Digital watermark is a good method to protect copyrights to encroach..In this article, the authors analyzed the configuration the common digital watermark arithmetic, and draw some conclusion of the analyzing. In the MPEG-4, DWT is advised to dispose digital image, so in this article, the author choose the DWT to be the field where the watermark would be embed. What's more, that we can get the four sub-images after DWT transform and we can embed secrete-sharing information to them.Anorld transform and chaos also are introduced in this article. Fast-Anorld transform make the digital image anomaly, then transact the anomaly image by chaos sequence. Chaos sequence makes the anomaly easier to embed. Secrete share is use to make the asthmatic more robust. Based on these theory and method, the author mention a new arithmetic, and all these could help to enhance the robustness of the watermark. During the reconstructed the watermark, for the characters of the HVS, the image process method was used to short the time of the reconstruct. New arithmetic of the reconstruct could hold calculation down and cut time short.