Sanjeevani Subhash Kagade and Sudhir S. Kanade, “ROBUST DIGITAL IMAGE WATERMARKING BY USING DCT TECHNIQUE ”, Int. j. innov. eng. res. technol., pp. 1–7, Mar. 2021, Accessed: Jun. 29, 2025. [Online]. Available: https://repo.ijiert.org/index.php/ijiert/article/view/707