Jalal Yousif A. A DISCRETE COSINE TRANSFORM BASED WATERMARKING SCHEME FOR COLOR IMAGE USING YCbCr SPACE. J. eng. sustain. dev. 2018;22(6):1-12. Accessed April 19, 2025. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/339