Robust And Blind Watermarking Based On Multi-Channel Of Color Image

Following the sharply development of intetnet and digital multi-media information,people's life has been enriched dramaticly.However,copyright protection has become more difficult than before. Digital watermarking is a valuable way on copyright protection of digital multi-media information.,therefore,many scholars are attracted to study it.In this thesis,I devote myself to the reseach of images watermarking. A novel image scrambling method based on the model of the law of gravity is presented as a initial stage of watermarking image processing which can reach good scrambling effect.This thesis also propose a new watermarking technique , in which watermarks are embeded into three color channels simultaneously.We can draw watermarks without original iamge..The experimental results and attack analysis show that the watermark algorithm is robust against some image processing operations,such as JPEG lossy compression , rotation,cropping and noise adding.