TẢO, N. V.; HỒNG, B. T. Improvement of the host image quality in the watermarking technique using the middle frequency domain of the DCT. Journal of Computer Science and Cybernetics, [S. l.], v. 22, n. 3, p. 282–291, 2012. DOI: 10.15625/1813-9663/22/3/1108. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/1108. Acesso em: 12 may. 2024.