Watermarking in Transform Domains (WTD)

In this paper two separate models of watermarking has been proposed based on wavelet and Z domain along with comparative study in terms of PSNR, MSE and IF. The cover image is passed through transformation based on 2 x 2 mask as sliding window manner in row major order to convert the spatial components of cover image into frequency coefficients. Four bits of authenticating image pixels are embedded into transform coefficients of each mask as watermark of the scheme to achieve the payload of one bpB (bit per Byte). Extraction is made in reverse manner. Results are computed and compared between two steganographic models in terms of Mean Square Error (MSE), Peak Signal to Noise Ratio (PSNR), and Image Fidelity (IF) which show better performances in Z-domain with enhanced fidelity.