Color Image Watermarking using DWT and DCT Coefficients of R, G, B Color Components
Eswaraiah Rayachoti, Sai Alekya Edara, Edara Sreenivasa Reddy · International Journal of Computer Applications · 2012
Digital image watermarking is the technology used to protect copy right information of multimedia objects.This paper presents a more secure method for copyright protection.In this scheme color image is decomposed into R, G, B channels and then DWT and DCT transformations are applied on these channels separately.The bits of watermark image are embedded into middle frequency coefficients of transformed R, G, B channels.Results reveal the performance of proposed algorithm using the metrics Peak Signal to Noise Ratio and Normalized Correlation and comparison of proposed scheme with the existing methods which used DWT-DCT transformations.