Jo. Cherian and Mereena Achu Thomas, “A SURVEY ON DWT AND LWT BASED DIGITAL IMAGE WATERMARKING”, IJRCAIT, vol. 4, no. 3, pp. 27–32, May 2016, Accessed: Sep. 01, 2025. [Online]. Available: http://ijrcait.com/index.php/home/article/view/IJRCAIT_04_03_005