Iman Abduljabbar Saad, Hussein Abed Hilal, Suleiman Saadon Fawzy, Ziad Mohammed Abood. “Hiding Text in Optimal Color of Color Image Using Dct and Ai Algorithms”. Design Engineering, May 2021, pp. 366 -75, http://www.thedesignengineering.com/index.php/DE/article/view/1543.