ACM SIGGRAPH 2004 Papers
Implementation of Watermark Detection System for Hardware Based Video Watermark Embedder
ICCIT '08 Proceedings of the 2008 Third International Conference on Convergence and Hybrid Information Technology - Volume 02
Digital Watermarking and Steganography
Digital Watermarking and Steganography
Optical Watermarking for Printed Document Authentication
IEEE Transactions on Information Forensics and Security
Digital rights management and watermarking of multimedia content for m-commerce applications
IEEE Communications Magazine
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We propose using emergable watermarks as copy indicators that become visible in video content that has been copied under designated conditions. A watermark pattern is designed that is sensitive to image processing specific to illegal copying. This is done on the basis of the aliasing effect, which causes image distortion when the re-sampling frequency is low. Watermarks using such patterns are embedded in the original video. They become visible only if the copy had been illegally generated by re-encoding with designated scaling. They show, for example, copy indicators, warning the viewer that the video had been illegally copied, and distort the image quality. Testing of a prototype implementation demonstrated the effectiveness of this method. The peak-signal-to-noise-ratio in watermarked video was adjustable by more than 28 dB. Use of this method should help deter the illegal copying and/or distributing of copyrighted videos.