Ernawan F, Ramalingam M, Sadiq AS, Mustaffa Z. An Improved Imperceptibility and Robustness of 4x4 DCT-SVD Image Watermarking with a Modified Entropy. JTEC [Internet]. 2017Sep.1 [cited 2024Apr.27];9(2-7):111-6. Available from: https://jtec.utem.edu.my/jtec/article/view/2602