Research On Video Watermarking Scheme Based On Video Registration

The digital watermarking can protect the integrity of digital product content and the ownership by embedding specific data to original data. And it is widely used in the field of Medical science, legal evidence, notes security, etc. Digital watermark has become a focus in the research area of digital media. The research and application of digital watermark has very important theoretical sense and application value in the aspect of ensuring the information of copyright, data authentication and integrity test, testing integrity and authenticity of data, controlling of radio broadcast, and so on.This thesis discusses the general technology issues of watermarking, described characteristics, the research background, application area, research status, classification, and development trends of video watermark. Base on researching several algorithms that can be used in video watermark, this thesis presents a novel watermarking scheme for videos based on affine geometric transformations. The algorithm can effectively overcome the video frame in the changes that have occurred during transmission, such as rotation, translation, or zooming. Finally, to compensate geometric distortions that have been introduced while a video travels down legal as well as illegal distribution chains, and achieve temporal and spatial synchronization of frames and pixels of two similar videos, we design an experimental system for video watermarking. In this system implements human-computer interaction and visualizes the results of all steps, such as temporal and spatial synchronization, watermark embedding and extraction. The resistance of the novel video watermarking to the temporal distortion is tested and verified in experiments. Experiments show that, the algorithm of this thesis has better robust to most of attack, especially improved the robust that resists the simultaneous attacks in the time and space, collusion attacks.