General quality maintenance module for motion picture watermarking

Because the picture quality of watermarked motion pictures must not be degraded by the watermarking, this paper describes a new module that controls watermarking processes. The module uses a new human sight model to optimize watermark strength for each frame of a motion picture, and it prevents flickering by limiting the frame-to-frame change in watermark strength. Another advantage of this module is that it can he used in a wide range of watermarking systems. The effectiveness of the proposed module has been demonstrated in five watermarking systems.