An Improved Image Sharing Scheme for Colour Images

Secret sharing is a method for distributing a secret amongst a group of participants, each of which is allocated a share of the secret. Many secret image sharing schemes based on visual cryptography and interpolation methods have been proposed in the literature. All the schemes facilitate generating and reconstructing the shares to produce the original image. In this paper, visual cryptography (VC) and Shamir's Lagrange's Interpolation (LIP) based schemes have been discussed and analysed first. Then an improved Shamir's image sharing scheme with Barycentric Interpolation (BIP) method has been proposed for colour images. All three schemes have been compared over different performance parameter like computation time, mean value and standard deviation. Results shows that the proposed scheme is better as compare to others.