A digital watermarking technique using neural networks

Watermarking techniques are primarily used for copyright protection. We invented a digital watermarking technique which is based on neural networks, cryptography, and image processing techniques. Our scheme can achieve the following two goals. One is that the illegal users do not know the locations of an embedded watermark in the image. The other is that a legal user can retrieve the embedded watermark from an altered (filtering, lossy compression, and scaling) image. In particular, the original image is not necessary for watermarking retrieving.