Abstract: “Digital watermarking is a technology that hides information in image to provide authentication. Information hiding is done by the tempering content of the image. The embedding process has to be such that the tempering of the media are invisible. The proposed work presents a novel DWT based self-embedding color image watermarking scheme by using cubic interpolation of mean difference matrices of the image and used it asa watermark. Cubic interpolation is used for up-sampling the image. Proposed scheme assure the self-embedding of original image and also assure extraction of watermark information with satisfied visual criteria. Two level DWT decomposition of original for embedding watermark information ensure Robustness of proposed scheme. Experimental results show that the proposed scheme is more efficient and robust.”

Keywords: Color image: Digital watermark, Discrete Wavelet Transform (DWT) , Cubic interpolation