Colored visual cryptography without color darkening

New Visual Cryptography Algorithm For Colored Image

Visual Cryptography is a special encryption technique to hide information in images, which divide secret image into multiple layers. Each layer holds some information. The receiver aligns the layers and the secret information is revealed by human vision without any complex computation. The proposed algorithm is for color image, that presents a system which takes four pictures as an input and ge...

Visual Cryptography Using Color Images

Information security has become a major issue as information technology is ruling the world. Cryptography using mathematical techniques is providing information security but requires complex algorithms, intensive mathematical computations and efficient computational resources. To avoid such intensive and complex algorithms a new scheme known as Visual cryptography (VC) was introduced by Naor an...

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...

A Secure Visual Cryptography for Color Images

-A visual cryptography scheme is a secret sharing scheme to encode a secret image SI in such a way that any qualified subset of participants can ―visually‖ recover the secret image, while forbidden subsets have no information on SI. A ―visual‖ recovery consists of xeroxing the shares, which are shadow images, onto transparencies and stacking them one on the top of the others. The participants i...

What, if Anything, is Colored?: Color Perceptions - Color Judgments - Without Color