Enhancement of Underwater Image Quality using Speckle Reducing Anisotropic Diffusion Algorithm Aju John K.K., Supriya M.H., P.R. Saseendran Pillai Department of Electronics, Cochin University of Science and Technology, Kerala, India,682022 ajujohnkk@gmail.com, supriya@cusat.ac.in, prspillai@cusat.ac.in