Reversible Secret Image Sharing Based on Shamir´s Scheme

A novel secret image sharing scheme was proposed by Lin and Tsai in 2004. They claimed that their scheme can achieve the goal of secret image sharing with the additional capabilities of steganography and authentication. After that, Yang et al. indicated that the Lin-Tsai scheme has three weaknesses, and further proposed an improved scheme in 2007. This scheme not only achieved authentication ability and improved stego-image quality but also introduced a lossless image sharing scheme for secret images. However, none of these stego-images can be recovered in their original state in these schemes. In this paper, we propose a new scheme which not only maintains all advantages in Lin-Tsai´s and Yang et al.´s schemes, but also overcomes this problem. According to the experimental simulations and discussions, we can prove that the proposed scheme has significantly better performance than the others.