Robust Digital Watermarking in Videos Based on Geometric Transformations

In the efforts to fight piracy of high-valued media content, forensic digital watermarking as a passive content security scheme is a potential alternative to current, restrictive ap-proaches like DRM. In this paper, we present a novel water-marking scheme for videos based on affine geometric trans-formations. Frames can be modified in an imperceptible manner by applying a small rotation, translation, or zoom-ing, which can be detected later on by comparison with the originals. To compensate geometric distortions that have been introduced while a video travels down legal as well as il-legal distribution chains, a spatio-temporal synchronization is performed using our video registration toolkit application. To evaluate our approach, we compare it with several other schemes regarding the robustness against common attacks, including camcorder capture