1.Tảo NV, Hồng BT. Improvement of the host image quality in the watermarking technique using the middle frequency domain of the DCT. J. Comput. Sci. Cybern. [Internet]. 2012 Jun. 23 [cited 2025 Dec. 5];22(3):282-91. Available from: https://vjs.ac.vn/jcc/article/view/1108