A lossless watermarking using visual cryptography authentication

To take advantage of visual cryptography, in this paper, a lossless watermarking method using visual cryptography authentication without pixel expansion for color image in frequency domain is proposed. The watermark can be recognized directly using visual cryptography scheme. The watermarked image is lossless and robust to serious attacks. The experimental results show that the proposed method can achieve the watermark verification visually. It also can achieve the authentication through third party.