Robust Watermarking Using DWT and Weighted SVD

This paper presents a robust watermarking technique based on Discrete Wavelet Transform (DWT) and weighted Singular Value Decomposition (SVD). Watermark is embedded in the selected wavelet band using weighted SVD. Band selection is made based on the characteristics of the watermark. Two different sizes of watermarks are used to ensure the security of the image. The efficacy of the algorithm is tested in terms of Peak Signal to Noise Ratio (PSNR) and NCC (normalized Correlation Coefficient).