... ad ditif : vers la se lection d’un es pace d’insertion optimal,” Coresa03, 2003. [9] S. Rastegar, F. Namazi, K. Yaghmaie and A. Aliabadian, “Hybrid watermarking algorithm based on singular value ... also that the HH sub-band robustness is enhanced with the proposed scheme. IV. CONCLUSION In this paper, we have made a contribution to a multiple non-blind watermarking scheme based on the DWT. ... decomposition, the two dimen sional DWT is applied to the LL sub-band. The detail images are called the vertical (LH), the horizontal (HL) and the diagon al (HH) sub- bands, they represent the mid and...