Adaptive Digital Watermarking for Copyright Protection of Digital Images in Wavelet Domain

Digital image watermarking is the process of embedding watermark into a digital image for authentication and thereby protecting the digital image from copyright violation. In this paper, an adaptive invisible watermarking scheme is proposed in wavelet domain. The proposed method is adaptive in the sense that the scaling and embedding factors are calculated using Bhattacharyya distance and the fourth cumulant moment - kurtosis. The proposed method can be easily employed to preserve the ownership rights and in addition for piracy of digital data prevention. The proposed method is robust to all image and signal processing attacks and highly secured for the protection of copyright information as the process is executed in wavelet domain. Experimental results and statistical evaluation of the results shows the efficacy of the proposed method.