INFORMATION THEORETIC APPROACH IN SPATIAL IMAGE WATERMARKING

An information theoretic approach is used to hide a visually meaningful and recognizable two level watermark symbol in the spatial domain. Watermark insertion regions are selected using both Shannon’s entropy measure as well as non-Shannonian entropy for image data. Experimental results confirm the robustness of the proposed scheme against several kinds of attacks, such as lossy compression, filtering, image rescaling, noise addition, cropping and translation etc.. Computational simplicity, less visual distortion and blind detection are the other advantages of the proposed technique.