Optimized Watermarking for Light Field Rendering based Free- View TV

In Free-View Television the viewers select freely the viewing position and angle of the transmitted multiview video. It is apparent that copyright and copy protection problems exist, since a video of this arbitrarily selected view can be recorded and then misused. In this context, the watermark in FTV should not only be resistant to common video processing and multi-view video processing operations (as in 2D case), but it should also be extracted from a generated video of an arbitrary view. Based on this remark, this paper focuses on this problem by evaluating the functionality and the efficiency of the watermarks and their corresponding Mathematical Distributions, in terms of “robustness” and “successful detection” from new constructed views of FTV, using Light Field Rendering (LFR) techniques. We studied the values which characterize the watermark’s performance and the parameters introduced by the watermark’s insertion-extraction scheme. Therefore, we ended up to the best five Mathematical Distributions, and we concluded that the watermark’s robustness in FTV case does not depend only on the FTV image’s characteristics, but it also relies on the characteristics of the Mathematical Distribution that is used as watermark generator. Evlampios Apostolidis • Tsampikos Kounalakis • Charalampos Manifavas • and Georgios A. Triantafyllidis ( ) 1 Information Technologies Institute, ITI-CERTH, Thessaloniki, Greece 2 Electronic and Computer Engineering Dept, Brunel University, London, UK 3 Applied Informatics and Multimedia Dept, TEI of Crete, Heraklion, Greece 4 Medialogy Section, Aalborg University, Copenhagen, Denmark E-mail: [email protected]