Ernawan, Ferda, Mritha Ramalingam, Ali Safa Sadiq, and Zuriani Mustaffa. “An Improved Imperceptibility and Robustness of 4x4 DCT-SVD Image Watermarking With a Modified Entropy”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 9, no. 2-7 (September 1, 2017): 111–116. Accessed April 26, 2024. https://jtec.utem.edu.my/jtec/article/view/2602.