Host: Transdisciplinary Federation of Science and Technology
Digital watermarking has been proposed as a solution to the problem of copyright protection of multimedia documents in networked environments. It embeds an imperceptible signal into data such as audio, video and images, for a variety of purposes, including captioning and copyright control. In this paper, we present a new digital image watermarking method base on DWT and JND (just noticed difference), by taking full advantage of the masking characteristics of the human visual system. The experimental results show that the proposed algorithm is effective and robust to common image processing operations and some geometric distortions such as cropping, pinching, pixel-shift, and so on, especially, it receives better robustness under signal enhancement operations. So a conclusion can be made that the proposed technique is practical.
