期刊名称：International Journal of Engineering Research
印刷版ISSN：2319-6890
出版年度：2014
卷号：3
期号：1
页码：31-33
出版社：IJER
摘要：The Visual Cryptography Scheme (VCS) is a kind of secret sharing scheme that focuses on sharing secret im- ages. The basic idea of the visual cryptography scheme is to split a secret image into number of random shares (printed on transparencies) which separately reveals no information about the secret image other than the size of the secret image. The secret image can be reconstructed by stacking the shares. The underlying operation of this scheme is logical OR operation. The Embedded Extended Visual Cryptography Scheme (EEVCS) uses meaningful covering shares. The scheme EEVCS can be implemented by embedding random shares of secret image into meaningful cover images.The halftoning method is used to convert the gray scale image into binary im- age. After Studying existing Dithering technique of half ton- ing, Otsus Thresholding method is proposed. Lea st Significant Bit (LSB) matching steganography technique is used to hide the secret pixel information into the covering images.Related works on visual cryptography scheme are also investigated and it was observed that visual quality of recovered secret images are low by using existing dithering halftone based EEVCS techniques.Including Otsus Thresholding method for halfton- ing of an image can produce bright image in a better way. LSB matching steganography is a useful method to hide the secret image. This research aims at employing LSB matching stega- nography with Otsu's method to d evelop an efficient EEVCS system.
