Enhanced Digital Image Watermarking Scheme based on DWT and SVD
Satendra Kumar, Jaydeep Kishore, Nitin Arora · 2012
Digital watermarking is a technique of embedding some information (usually hidden copyright notices) into an image. Number of applications has been found in various fields like copyright protection, content authentication, document annotation, medical imaging. So, an enhanced semi-blind, hybrid digital image watermarking scheme based on discrete wavelet transform (DWT) and singular value decomposition (SVD) is our proposed approach in this paper. To increase and control the strength of the watermark, we used a scale factor. our proposed approach, the watermark is not embedded directly on the wavelet coefficients but rather than watermark wavelet coefficient are inserted on singular values of the cover images with modifying wavelet transform (DWT) HL1 sub band. Experimental results clearly show that this proposed scheme is quite resilient to various image processing attacks.