A METHOD FOR GENERATING AND DECODING IMAGE DEPENDENT WATERMARKS

摘要

A method for generating image dependent watermarks is described. The method is based on a novel magnitude coding technique which renders the watermark dependent of the image. In addition, it is shown how to incorporate constraints on the visibility of the watermark as well as constraints arising from the fact that pixels must be specified within the range 0 and 255. Furthermore, it is demonstrated that the method is flexible and easily applicable to any combination of transform and/or spatial domain watermarks and/or constraints.