A Watermark Algorithm on Relativity Examination Based on Fourier Transform
Hao Chen · Computer Knowledge and Technology · 2008
This thesis provides a meaning watermark algorithm based on DFT. The watermark data was scrammed with Arnold transform before embedding,then modify the high and the middle frequency part to embedding, embedding watermark adopt embedding two not related.The experiment results shows that,this algorithim enhances the security, increases the accurate rate of the traditional relativity examination and the robustness.