Protecting Medical Images Using a Zero-Watermarking Approach Based on Fractional Racah Moments by Karim El-Khanchouli, Hanaa Mansouri, Nawal El Ghouate, Hicham Karmouni, Nour-Eddine Joudar, Mhamed Sayyouri, S. S. Askar, Mohamed Abouhawwash

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