Publications Scientifiques

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Author: search.filters.author.Boutalbi, Mohammed ChakerHas files: Yes

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    High-capacity DWT-SVD watermarking for MRI images embedding MITR medical information
    (Elsevier, 2025) Benyoucef, Aicha; Goudjil, Aya; Hamadouche, M'Hamed; Boutalbi, Mohammed Chaker; Ammar, Mohammed; El Habib Daho, Mostafa
    Securing Medical Imaging Test Reports (MITRs) during digital transmission is a growing concern in the era of telemedicine. Conventional watermarking methods often face a trade-off between imperceptibility, robustness, and payload capacity, especially in the context of sensitive medical data. To address this challenge, we propose an efficient and secure watermarking technique tailored for MRI brain images, using a combination of Discrete Wavelet Transform (DWT) and Singular Value Decomposition (SVD). The core idea involves embedding four sub-watermarks—a QR-encoded MITR, patient photo, and hospital logos—into strategically selected Region of Non-Interest (RONI) blocks of the cover image, while preserving the diagnostic Region of Interest (ROI). This region-based design ensures both high payload capacity and minimal visual distortion, even under hardware constraints. Experimental evaluations demonstrate that our method maintains high imperceptibility (PSNR > 67 dB, SSIM = 1.000), robustness (NC > 0.9430), and zero Bit Error Rate (BER = 0.1120) under common image processing attacks. Additionally, the use of QR codes for encoding the MITR improves the security and confidentiality of patient data. Compared to recent approaches, our method achieves better performance in both visual quality and robustness, confirming its effectiveness for secure medical image transmission in clinical and telehealth applications
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    A summary of the existing challenges in the design of a routing protocol in UAVs network
    (IEEE, 2020) Boutalbi, Mohammed Chaker; Riahla, Mohamed Amine; Ahriche, Aimad
    The difficulties in the routing mechanism in UAV's networks are taking interest in these last years. The challenge is still up to come up with full solutions for the developed constraints that have been raised with the high dynamicity and link disconnections in this type of ad hoc network. Large and detailed surveys have been proposed in the literature, where they essentially focus on the taxonomy of a vast number of proposed solutions. Based on this, and from a different angle of view, in this paper, we summarize the existing challenges in the design of a routing protocol for UAVs network. Unlike the other works, our approach focuses on collecting and illustrating all routing constraints that a drone can face in the decision-making process, also, we argue on how an appropriate design of a FANET routing protocol should be to provide a generic and efficient evaluation platform for future works.