Video watermarking scheme resistant to geometric attacks
The robustness against geometrical attacks remains one of the most challenging issues in watermarking of images and video. This paper presents several improvements of the video watermarking approach presented in Haitsma et al. (2001), namely (i) using a temporally low-pass watermark and (ii) synchronization to resist attacks along the temporal axis. In order to improve the watermark detection performance, we propose to use an amplitude-limiting filter and a whitening filter during the watermark extraction process. Experimental results show that the proposed techniques achieve good performance.