Multichannel digital watermarking of color images using SVD

In this paper we propose a new invisible, non-blind digital watermarking scheme for color images based on singular vector domain (SVD). In this new approach, same or different watermarks can be embedded into the three color channels (R, G, B) of the host image in order to increase the robustness of the watermark. The proposed method demonstrates that color image watermarking is possible without affecting its visual quality and also allows for reasonable compromise between robustness and invisibility of watermarks. This research, based on our earlier work, consists of embedding a gray watermark into a gray host and a color watermark into a color host based on the singular vector domain. The main feature of our scheme is to use all channels of RGB color space to embed watermarks. Hence we are embedding maximum amount of watermark and also make it more secure. The other feature of our scheme is that it can be used for a variety of applications since we can perform single channel embedding to multichannel embedding. We then show our simulation results for one channel, two channel and three channel and also results for how it behaves under various attacks.