Watermarking Based on Iterated Function Systems

This paper presents an original approach for watermarking of digital images using Iterated function Systems (IFS) to generate positions maps used by Least Significant Bit method (LSB). The new approach exploits the main feature of fractals (generated by IFS): infinite magnification. The map generated by only one IFS can be used in images of different sizes. Furthermore, to avoid the image distortion by the embedding process, the data are inserted in non-homogeneous regions, to obtain this behavior, the Harris feature detector was modified. Obtaining a watermarking scheme robust to visual attack.