A Novel Color Multi-Secret Visual Cryptography Scheme

In this paper a color multi-secret visual cryptography scheme specifically for (3, 4, 5) access structure is proposed with random colors and XOR operation being leveraged to generate the sharing images. The recovery images with size invariant are obtained by the XOR operation of specific combination of shares. In order to achieve ideal perceptual quality, we present the optimization algorithm with which the visual quality of recovery images is improved significantly without sacrificing computation complexity. Experimental results demonstrate the effectiveness of the proposed scheme.