Digital Image Watermarking Using Holograms
In image watermarking, holography usage is a very novel approach. Holography, in fact, is a method to store three-dimensional (3-D) information of an object, however, many of its properties make it very applicable in use of watermarking. In this work, a new blind image watermarking approach is proposed, which embeds a hologram as the watermark into a host image. Moreover, the robustness of the method is examined against some attacks like, JPEG compression, noise addition and cropping