期刊名称：International Journal of Research in Computer Engineering & Electronics
印刷版ISSN：2319-376x
出版年度：2014
卷号：3
期号：3
语种：English
出版社：BHOPAL INSTITUTE OF PROFESSIONAL STUDIES
摘要：The Visual Cryptography Scheme (VCS) is a secret sharing scheme which is used to secure the secret images.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 image. After Studying existing Dithering technique of half toning, Otsus Thresholding method is proposed. Least 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 Otsu’s Thresholding method for halftoning 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 steganography with Otsu’s method to develop an efficient EEVCS system
