Robust digital image watermarking based on normalization and complex wavelet transform

In this study, a new digital image watermarking algorithm based on moment-based image normalization and the two dimensional dual tree complex wavelet transform (2D DT-CWT) was developed. Normalization provides robustness against geometrical distortions, whereas 2D DT-CWT increases robustness for attacks such as additive noise, linear and nonlinear filtering, JPEG compression. It was accomplished that added watermark achieves both transparency and robustness requirements by taking the properties of the human visual system account.