TẢO, Nguyễn Văn; HỒNG, Bùi Thế. Improvement of the host image quality in the watermarking technique using the middle frequency domain of the DCT. <b>Journal of Computer Science and Cybernetics</b>, <i>[S. l.]</i>, v. 22, n. 3, p. 282–291, 2012. DOI: 10.15625/1813-9663/22/3/1108. Disponível em: https://jcc.vast.vn/jcc/article/view/1108. Acesso em: 4 nov. 2025.