Adaptive watermarking – two ways to define it

Abstract

Digital watermarking has been proposed as a solution to the problem of copyright protection of multimedia data in a networked environment. It makes possible to tightly associate to a digital document a code allowing the identification of the data creator, owner, authorized consumer, and so on. Content-based image watermarking techniques bring improvements to the robustness of the watermark and to the reconstruct image quality. In this paper, two different ways of defining the adaptability of the watermark to the host image will be presented. The first one is based on human visual system (HVS) properties and in the second one the areas that will be marked are chosen depending on the image. The obtained results for both schemes show that the techniques are resilient to most common attacks including filtering, lossy JPEG compression, geometric transformations etc.