Video Watermarking Algorithm Resistant to Geometry Transformation Attacks Based on Contourlet Transform
Lei Pang · Jisuanji fangzhen · 2009
How to resist geometry transformation attacks effectively has become a focus of digital watermarking. A video watermarking scheme resistant to geometry transformation attacks was proposed. In the scheme of watermark embedding, average AC energy (AAE) and the characteristic of spatial-frequency of Contourlet transform were used for the embedding of watermark. While in the extracting scheme, optimum prewhitening filter makes correlation detection more effective. Experimental results show that the proposed scheme can make the watermark resist geometry transformation attacks effectively and keep the visual quality of the video. In addition, it also has enough robustness to resist other attacks, such as lowpass filtering and frame deleting attack.