An Improved Color Image Watermark Algorithm Based on DWT
Fen Yang · Information Technology and Informatization · 2009
This paper introduced the concepts of digital watermark,and proposed a kind of DWT-based color image watermark algorithm combining with HVS.Firstly,we applied the pre-scrambling encryption to watermark image which enhanced algorithm's security.Then we calculated the amounts of green component,compared it with the pre-determined threshold and chose different embedding modes according to their relations.Different color components will be embeded into different frequency bands.Experiments showed that this algorithm ensured better embedded quantity under the condition of non-visual distortion,and resisted common attack and had better robustness.