Description

ABSTRACT

A novel visual cryptography scheme called region incrementing visual cryptography (RIVC), for

sharing visual secrets with multiple secrecy levels in a single image. The encoding basis matrices

of RIVCS for an image containing three to five regions have been reported in the literature, but no

construction method has ever been studied. The proposed system developed a novel and efficient

construction for RIVCS using linear programming in this paper. The proposed integer linear

program aims at the minimization of the pixel expansion under the constraints for being a RIVCS.

Experimental results demonstrate the feasibility, applicability, and flexibility of our construction.

The pixel expansions and contrasts derived from our scheme are also better than the previous

results.