Invisible Digital Watermarking using Discrete Wavelet Transformation and Singular Value Decomposition
Keywords:
Authentication, copyright protection, digital watermarking, discrete wavelet transform (DWT), singular value decomposition (SVD).Abstract
The main goal of developing an invisible digital watermarking algorithm is to satisfy an
imperceptibility requirement. Imperceptibility implies that embedded watermark is invisible to naked
eyes. To achieve this objective, a hybrid image watermarking scheme based on discrete wavelet
transformation (DWT) and singular value decomposition (SVD) is proposed in this paper. In our
proposed method, the watermark is not directly embedded on the watermark coefficients. But here
first we apply DWT and SVD to cover image and watermark image, modify the singular value of the
cover image with singular value of watermark image using sub bands and then perform inverse DWT
to get the Watermarked image. We have obtained the experimental results by calculating PSNR values
of sample images. Experimental results illustrate that higher the PSNR values we gets less
degradations in watermarked image using our proposed method.
