Visual-cryptography-based blind watermarking scheme for copyright protection

摘要

In this paper, a blind watermarking scheme based on Visual Cryptography (VC) is proposed. A sub-image is extracted from the host image and master share is generated by combining the luminance features and edge features of this sub-image. Ownership share is constructed by using a binary secret image together with the master share. When the owner needs to be identified, we can stack these two shares to recover the secret image to validate the ownership. Experimental results demonstrate that the proposed scheme is robust against various image-processing operations, geometric attacks and JPEG compression.