Invariant Digital Image Watermarking Scheme in the Projected-Frequency Domain

摘要

The development of Internet and computer technologies facilitates the data processing and transmission but also they make the data vulnerable to hacking and illegal modification. In fact, the development of an effective way for data protection represents an important research focus. For this reason, three techniques for data security are proposed, which are: cryptography, steganography and watermarking. In this order, we propose to develop a new blind watermarking approach based on new hybrid decomposition. Our contribution is defined by two steps: The first one is to construct the projected-frequency domain. This domain is described by its invariance face to noises, JPG compression and asynchronous attacks. Also, the transformed image to this field is represented by a larger size and higher coefficients than the original image. Based on these proprieties, we defined our second contribution which consists to develop a blind and robust watermarking scheme in the given field. Simulation results and comparative study prove the robustness and the imperceptibility of the proposed water-marking approach.