ResearchBib Share Your Research, Maximize Your Social Impacts
Sign for Notice Everyday Sign up >> Login

Improving Image Quality In Extended Visual Cryptography For Halftone Images With No Pixel Expansion

Journal: International Journal of Scientific & Technology Research (Vol.3, No. 4)

Publication Date:

Authors : ; ; ;

Page : 126-131

Keywords : Index Terms extended visual cryptography; image processing; improving image quality; secret sharing; visual cryptography;

Source : Downloadexternal Find it from : Google Scholarexternal


Abstract Visual cryptography is a secret sharing scheme that divides secret images into shares such that when the shares are superimposed a hidden secret image is revealed. In extended visual cryptography an extra security is provided by giving cover images to the shares. However in either case loss of resolution contrast and image size expansion are challenging problems that the researchers are facing. In this paper we propose a method for processing halftone images that improves the quality of the recovered images and also avoids pixel expansion. The resulting scheme maintains the perfect security of the original extended visual cryptography approach and also provides a better result.

Last modified: 2015-06-28 03:54:56