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A DISCRETE COSINE TRANSFORM BASED WATERMARKING SCHEME FOR COLOR IMAGE USING YCbCr SPACE. J. eng. sustain. dev. [Internet]. 2018 Nov. 1 [cited 2024 May 3];22(6):1-12. Available from: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/339