Enhance the image sharing with steganography and authentication

Recently, Yang et al. showed that the Lin-Tsai scheme has three weaknesses and further proposed improvements in 2007. They are not only improve authentication ability and image quality of stego-image, but also introduce a lossless image sharing scheme for secret image. Unfortunately, the embedding algorithm in their scheme is obviously not optimal. To enhance Yang et al. 's scheme, a novel secret image sharing scheme based on the simple LSB substitution and an optimal pixel adjustment process will be proposed in this paper. The experimental results show that the proposed scheme has significantly better image quality than others. In other words, our scheme not only maintains secret image sharing and authentication ability but also enhances the image quality.