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Performance of Error Filters on Shares in Halftone Visual Cryptography via Error Diffusion

by Anshul Sharma, Sunil Agrawal
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 45 - Number 12
Year of Publication: 2012
Authors: Anshul Sharma, Sunil Agrawal
10.5120/6832-9420

Anshul Sharma, Sunil Agrawal . Performance of Error Filters on Shares in Halftone Visual Cryptography via Error Diffusion. International Journal of Computer Applications. 45, 12 ( May 2012), 23-30. DOI=10.5120/6832-9420

@article{ 10.5120/6832-9420,
author = { Anshul Sharma, Sunil Agrawal },
title = { Performance of Error Filters on Shares in Halftone Visual Cryptography via Error Diffusion },
journal = { International Journal of Computer Applications },
issue_date = { May 2012 },
volume = { 45 },
number = { 12 },
month = { May },
year = { 2012 },
issn = { 0975-8887 },
pages = { 23-30 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume45/number12/6832-9420/ },
doi = { 10.5120/6832-9420 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T20:38:34.014750+05:30
%A Anshul Sharma
%A Sunil Agrawal
%T Performance of Error Filters on Shares in Halftone Visual Cryptography via Error Diffusion
%J International Journal of Computer Applications
%@ 0975-8887
%V 45
%N 12
%P 23-30
%D 2012
%I Foundation of Computer Science (FCS), NY, USA
Abstract

Visual cryptography encodes a secret binary image (SI) into shares of random binary patterns. The decoding process of a visual cryptography scheme, which differs from traditional secret sharing, does not need any cryptographic algorithms like symmetric and asymmetric algorithms. Visual cryptography is based on the images and is obtained by sending pixel information and stacking of pixels for recovery of the secret image. Instead of using binary patterns of the shares, which does not give any visual meaning and hinder the objectives of visual cryptography, halftone visual cryptography via error diffusion is used that encodes a secret binary image into n halftone shares (images) carrying significant visual information. When secrecy is important factor rather than the quality of recovered image the shares must be of better visual quality. Error diffusion has low complexity and provides halftone shares with good image quality. Different filters such as Floyd-Steinberg, Jarvis, Stuki, Burkes, Sierra, and Stevenson's-Arce are used and their impact on visual quality of shares is seen. The simulation shows that error filters used in error diffusion lays a great impact on the visual quality of the shares and better shares can be obtained by using complex filters without affecting the objectives of visual cryptography.

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Index Terms

Computer Science
Information Sciences

Keywords

Visual Cryptography Error Diffusion Halftone Visual Cryptography Secret Sharing

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