Non-decimated wavelet domain based robust blind digital image watermarking scheme using singular value decomposition

In this manuscript, a new method for blind digital image watermarking scheme in Non-decimated wavelet transform domain is proposed, and that may be generalized to digital audio, video and documents. Digital image watermarking is to add some hidden message for maintaining the copyright data secure. Proposed algorithm combines the information of low frequency wavelet coefficients and the watermark image without any change in the information present in the original image. Key is combination and is used to extract the watermark. The proposed method will not affect the quality of the image because of no change in the information present in the original image. The efficiency of the proposed method in terms of robustness and imperceptibility is shown by using some of the historically adopted parameters like peak signal to noise ratio (PSNR); normalized cross correlation (NCC) and compared with some of the conventional methods.