Noura Aherrahrou

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The Discrete Cosine Transform (DCT) based watermarking scheme is a common and popular technique that has been used for long time for image watermarking. In this work, we aimed to further improve the commonly used DCT based watermarking method by combining the DCT with the PDE (Partial Differential Equation) method or with the FABEMD (Fast and Adaptive(More)
BACKGROUND This work deals with copyright protection of digital images, an issue that needs protection of intellectual property rights. It is an important issue with a large number of medical images interchanged on the Internet every day. So, it is a challenging task to ensure the integrity of received images as well as authenticity. Digital watermarking(More)
The Discrete Cosine Transform (DCT) based watermarking scheme is a common and popular technique that has been used for long time for image watermarking. This technique is based on embedding watermark information in the middle frequency band of the DCT blocks of the host image. In this work, we aimed to further improve the commonly used DCT based(More)
The FABEMD decomposition is a method based on decomposing an image into multiple hierarchical components known as Bidimensional Intrinsic Mode Functions (BIMFs) and residue. In this work we aimed to improve this method. A new robust digital image-watermarking method is proposed, which integrates Discrete Cosine Transform (DCT), as well as Fast and Adaptive(More)
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