Improvement of the host image quality in the watermarking technique using the middle frequency domain of the DCT.
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https://doi.org/10.15625/1813-9663/22/3/1108Abstract
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N. V. Tảo and B. T. Hồng, “Improvement of the host image quality in the watermarking technique using the middle frequency domain of the DCT”., JCC, vol. 22, no. 3, pp. 282–291, Jun. 2012.
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