M. Abduldaim, Areej, and Mohammed Qasim Hamid. “Robust Image Watermarking Based on QR Factorization and LWT”. International Journal of Engineering and Technology 7, no. 4 (March 28, 2019): 5358–5362. Accessed May 19, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/23661.