An adaptive Second Level Hybrid Image Watermarking Technique using DWT-SVD in Low Frequency Band

Abstract: Day by day the increase in technology and other multimedia systems has created an urgent need for copyright ownership of multimedia contents. Digital Image Watermarking is one such technology that has been developed to protect digital images from illegal manipulations. To achieve this goal, here we present a hybrid image watermarking algorithm based on Discrete Wavelet Transforms and Singular Value Decomposition to protect the watermark image information or hide such that assumption made like visible image is cover image and other is watermark image for content ownership. The singular value is going to embedded with watermark singular values making use of scaling factor (a). The experimental results show the effectiveness of hybrid image watermarking scheme. Performance of methodology is evaluated using different fidelity parameters like as peak signal noise ratio (PSNR) and normalized cross correlation (NCC).

Keywords: Image watermarking, discrete wavelet transforms, SVD, PSNR; CC.