A Rumination of Error Diffusions in Color Extended Visual Cryptography
نویسندگان
چکیده
Color visual cryptography (VC) is a secret sharing scheme which uses to encrypt a secret message into n halftone image shares. The users can recover the secret image by stacking their shares, and then secret image can be revealed. In extended visual cryptography, the share images are constructed to contain meaningful cover images. Halftoning and visual information pixel (VIP) is the important feature, which provides immunity at the early stage of cryptography. In this paper we make a rumination of various error diffusions and visual information pixel (VIP) synchronization techniques to generate meaningful color shares with high visual quality and compare the respective algorithms for parameters such as PSNR and perceived error. Keywords— Color meaningful shares, halftoning, error diffusion, visual cryptography (VC)..
منابع مشابه
Contrast Enhancement in Color Extended Visual Cryptography
Visual cryptography is a secret sharing technique mainly used for image sharing. In the case of extended visual cryptography we use meaningful shares to hide image. Contrast loss in decrypted image is a major problem. Here we use Additional basis matrix and perfect white pixel reconstruction to improve the contrast in color extended visual cryptography. Keywords— Visual Cryptography (VC), Halft...
متن کاملExtended Visual Cryptography for Color Shares using Random Number Generators
Visual cryptography is a special image encryption technique. It is different from traditional cryptography, because it does not need complex computation to decrypt. The benefit of the visual secret sharing scheme is in its decryption process where without any complex cryptographic computation encrypted data is decrypted using Human Visual System (HVS). But the encryption technique proposed here...
متن کاملA Novel Secured Transmission Of Color Extended Visual Images Using Error Diffusion
Cryptography is the science of writing in secret code and is an ancient art. Cryptography not only protects data from theft or alteration, but can also be used for user authentication.visual cryptography is a technique which allows visual information to be encrypted in such a way that the decryption can be performed by the human visual system. This paper introduces the concept of visual informa...
متن کاملمطالعهای بر رمزنگاری بصری و ارائه‌ی روش پیشنهادی برای رمزنگاری تصاویر رنگی
Visual cryptography is a method that makes use of the characteristics of human vision and it requires neither the knowledge of cryptography nor the complex calculations. This method was first proposed by Naor and Shamir, its implementation is simple, it has been extended to an secrect sharing (k, n) in which n shares are made from the image and they are distributed among n participants. Moreov...
متن کاملOn the Analysis and Generalization of Extended Visual Cryptography Schemes
An Extended Visual Cryptography Scheme (EVCS) was proposed by Ateniese et al. [3] to protect a binary secret image with meaningful (innocent-looking) shares. This is implemented by concatenating an extended matrix to each basis matrix. The minimum size of the extended matrix was obtained from a hypergraph coloring model and the scheme was designed for binary images only [3]. In this paper, we g...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2014