A Novel Probabilistic Visual Cryptography Scheme Using EDBS for Grayscale Image

摘要: The reconstructed image of probabilistic visual cryptography (VC) is inevitably accompanied by the loss secret information and degradation quality. Since halftone technique can realistically simulate grayscale continuous tone with a binary image, in this paper, combining VC sharing technique, we propose scheme for using EDBS (Efficient Direct Binary Search) to improve quality image. adopted into process, taken as optimization object. Through local optimizations global iterations, optimal finally achieved under established strategy. Theoretically proposed possesses same security strength traditional experimentally comparative analysis verifies effectiveness scheme.