Pattern based robust digital watermarking scheme for images

Digital Watermarking is an effective and popular technique to discourage illegal copying and distribution of copyrighted digital image information. The important attributes are the picture quality of the watermarked image (similarity to the original) and robustness to attacks such as cropping. We propose a transform-domain robust digital watermarking technique which uses a pattern-based compression of the watermark image, an intelligent dynamic embedding of the signature bits and a post-watermarking content-based visual masking technique to deliver high image quality and robustness in retaining watermark content against attacks (cropping).