“…Selected literature in watermarking research, whose scope is more close to the research presented in this paper, is discussed now. In [35,9,18], several software-based DRM and watermarking systems are proposed which are more or less ready-to-use. Visible watermarking algorithms which are absolutely essential for many applications, including protection of publicly available images and video broadcasting, are presented in [2,21,15,25,19,12,36,14,37,4,42,8].…”