Radha Kumari, R., V. Vijaya Kumar, and K. Rama Naidu. “Optimized DWT Based Digital Image Watermarking and Extraction Using RNN-LSTM”. International Journal of Interactive Multimedia and Artificial Intelligence 7, no. 2 (December 1, 2021): 150–162. Accessed November 18, 2025. https://www.ijimai.org/index.php/ijimai/article/view/635.