Jo. Cherian, and Mereena Achu Thomas. 2016. “A SURVEY ON DWT AND LWT BASED DIGITAL IMAGE WATERMARKING”. INTERNATIONAL JOURNAL OF RESEARCH IN COMPUTER APPLICATIONS AND INFORMATION TECHNOLOGY (IJRCAIT) 4 (3): 27-32. http://ijrcait.com/index.php/home/article/view/IJRCAIT_04_03_005.