Abstract
Region Incrementing Visual Cryptography (RIVC) was first introduced by R Z Wang in 2009. (2, n) region incrementing visual cryptographic scheme gradually reconstructs the secrets in a single image with multiple security levels. But Wang's scheme suffers from color reversal and pixel expansion. Later, in 2012, k out of n region incrementing scheme and Efficient Construction for Region Incrementing Visual Cryptography using linear programming are also introduced. But all of these have a large pixel expansion problem and some of the methods suffer from colour reversal also. In this paper, efficient construction method of (2, 3) RIVCS is introduced without any pixel expansion and increased contrast. The following are the important features of the proposed system. a) It has no pixel expansion b) Increased contrast c) The color reversal problem is completely eliminated.
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