Image synchronization using watermark as RST invariant descriptors

This paper proposed a method that using watermarking signal as the invariant descriptor, in order to locate the rotation, scale and translation that applied to the host image. The method uses the RST invariant Fourier-Mellin transform and Phase only symmetric matched filter as fundamental concept. It also presents the method that applies the watermark symbols at proper geometric locations which can reveal the watermarked image portion. The simulation results show that the proposed method is very effective to allocate the image portion that has been marked by the synchronization watermark.