A watermarking scheme for digital images based on visual cryptography

Abstract

A robust and blind watermarking scheme based on visual cryptography for copyright protection of digital images is proposed in this paper. It generates two shares of the secret image based on visual cryptography by comparing the pixel value of the image with the mean of the pixel values in each image block. The experimental results show that the proposed scheme clearly verifies the copyright of the digital images and is more robust in comparison with other visual cryptography based watermarking methods on a variety of attacks.