DWT based Digital Watermarking Fidelity and Robustness Evaluation

ABSTRACT An Image Adaptive Watermarking,method,based on the Discrete Wavelet Transform is presented in this paper. The robustness and fidelity of the proposed,method,are evaluated and the method,is compared,to state-of-the-art watermarking,techniques available in the literature. For the evaluation of watermark transparency, an image fidelity factor based on a perceptual distortion metric is introduced. On the other hand, a degradation factor is introduced for the evaluation of watermark,robustness against JPEG com- pression and resizing. The new,fidelity metric allows a perceptually aware objective quantification of image,fi- delity. The suitability of the proposed metric for the fidelity evaluation of still image watermarking is supported by sim- ulation results. Keywords: Digital Watermarking, Discrete Wavelet Trans- form, Perceptual Metrics.