Quality Enhancement of Visual Cryptography for Secret Sharing of Binary, Gray and Color Images

Obscuring the important message before disseminating become obligatory. In a traditional (n,k) threshold visual secret sharing(VSS), size of the reassembled secret is more than the original secret image and the reassembled secret image consist of lots of noise. An (n,k)-threshold visual secret sharing system is more appropriate for binary, gray and color secret images when the reassembled secret is identical with the original secret in size and content. In the former techniques, the reassembled binary image loses contrast and the gray and color image are reassembled with a huge amount of noise which is greater in size w.r.t original secret image. The proposed approach significantly improve the quality and constructs original size of the reassembled secret image